U.S. patent application number 11/598761 was filed with the patent office on 2007-06-14 for step over walking aid.
Invention is credited to Bernard Levy, David Wald.
Application Number | 20070130804 11/598761 |
Document ID | / |
Family ID | 38137844 |
Filed Date | 2007-06-14 |
United States Patent
Application |
20070130804 |
Kind Code |
A1 |
Levy; Bernard ; et
al. |
June 14, 2007 |
Step over walking aid
Abstract
An ambulatory assistance system includes an article of footwear
adapted to be worn on a foot of a user or walking aid devices; and
a barrier coupled to the article of footwear such that, when the
article of footwear is worn on a foot of the user, at least a
portion of the barrier extends into a visually engagable region
that is adjacent to a medial side of the one foot of the user, that
is visible to the user, and that lies in a path of movement of
another foot of the user. Further, the barrier may be coupled to
the article of footwear via an attachment. Moreover, the ambulatory
assistance system may be adapted for use with one or two articles
of footwear.
Inventors: |
Levy; Bernard; (San Diego,
CA) ; Wald; David; (Santa Clara, CA) |
Correspondence
Address: |
Gary M. Nath;NATH & ASSOCIATES PLLC
112 South West Street
Alexandria
VA
22314
US
|
Family ID: |
38137844 |
Appl. No.: |
11/598761 |
Filed: |
November 14, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11347476 |
Feb 3, 2006 |
|
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11598761 |
Nov 14, 2006 |
|
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60750486 |
Dec 14, 2005 |
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Current U.S.
Class: |
36/136 ;
36/1 |
Current CPC
Class: |
A43B 1/0027 20130101;
A43B 3/0005 20130101; A61H 2201/1642 20130101; A43B 3/00 20130101;
A61H 3/04 20130101; A61H 3/00 20130101 |
Class at
Publication: |
036/136 ;
036/001 |
International
Class: |
A43B 3/00 20060101
A43B003/00; A43B 23/00 20060101 A43B023/00 |
Claims
1-25. (canceled)
26. An ambulatory assistance system, comprising: a walking
assistance device; and at least one barrier attached to said
walking assistance device such that at least a portion of the
barrier extends into a visually engageable region of the user that
is adjacent to a medial side of the walking assistance device and
that lies in a path of movement of a foot of the user, the barrier
proximate a walking surface when the walking assistance device is
in contact with the walking surface.
27. The ambulatory assistance system according to claim 26, wherein
the walking assistance device is a walker.
28. An ambulatory assistance system according to claim 27, wherein
said walker has first and second legs for contacting ground to be
located adjacent opposite sides of a user.
29. An ambulatory assistance system according to claim 28, wherein
said leg has a body portion affixed to a lower end thereof and
wherein each said body portion has one said barrier affixed
thereto.
30. An ambulatory assistance system according to claim 29, wherein
said walker comprises a wheel mounted to a lower end of each of
said first and second legs and each said leg further comprising a
downwardly extending extension to which one said barrier is mounted
and wherein said extension maintains said barrier adjacent a
walking surface such that a user may step over said barrier.
31. The ambulatory assistance system according to claim 26, wherein
said walking assistance device comprises a cane.
32. The ambulatory assistance system according to claim 31, wherein
said walking assistance device comprises first and second
canes.
33. The ambulatory assistance system according to claim 26, wherein
said walking assistance device comprises a shoe.
34. The ambulatory assistance system according to claim 26, wherein
said walking assistance device comprises a pair of shoes.
35. An ambulatory assistance system according to claim 26, wherein
the barrier is rigid.
36. An ambulatory assistance system according to claim 26, wherein
the barrier is flexible.
37. An ambulatory assistance system according to claim 26, wherein
the barrier is magnetically coupled to the walking assistance
device.
38. An ambulatory assistance system according to claim 26, wherein
wherein the barrier is elongated and has an axial length of about
11/2-6 inches.
39. The ambulatory assistance system of claim 26, wherein the
barrier has a maximum transverse dimension of about 1/4-2
inches.
40. The ambulatory assistance system of claim 26, wherein the
barrier is a coil spring.
41. The ambulatory assistance system of claim 26, wherein the
barrier is immovably fixed to the walking assistance device.
42. The ambulatory assistance system of claim 26, wherein the
barrier is rotatably fixed to the walking assistance device.
43. The ambulatory assistance system of claim 26, wherein the
barrier is capable of detachment from the walking assistance
device.
44. The ambulatory assistance system of claim 43, wherein the
barrier further comprises an attachment member.
45. An ambulatory assistance system, comprising: a walker having a
first side and a second side, the first side having a first side
front support portion, a first side rear support portion, and a
first side handle portion, the second side having a second side
front support portion, a second side rear support portion, and a
second side handle portion; at least one cross support member,
wherein the first side and the second side are joined by the at
least one cross support member; at least one barrier attached to at
least one of the first side front support portion or the second
side front support portion such that at least a portion of the
barrier extends into a visually engageable region of the user that
that lies in a path of movement of a foot of the user, the barrier
proximate a walking surface when the walker is in contact with a
walking surface.
46. An ambulatory assistance system, comprising: a walking
assistance device; a visual stimulation means for visually
stimulating a user, wherein the visual stimulation means is
attached to said walking assistance device such that at least a
portion of the visual stimulation means extends into a visually
engageable region that is adjacent to a medial side of said walking
assistance device, that is visible to the user, and that lies in a
path of movement of a foot of the user, said means for coupling
maintaining said visual stimulation means proximate a walking
surface when said walking assistance device is in contact with the
walking surface.
Description
[0001] This application claims the benefit of U.S. Provisional
Application No. 60/750,486, filed Dec. 14, 2005, which is
incorporated in its entirety herein by reference.
BACKGROUND
[0002] 1. Field of Invention
[0003] Embodiments exemplarily disclosed herein relate generally to
ambulatory assistance systems adapted to assist persons afflicted
with diseases such as Parkinsonism, Parkinson's disease, etc., in
overcoming a sudden loss of mobility or motor block episode, i.e.,
"freezing."
[0004] 2. Discussion of the Related Art
[0005] Parkinsonism, Parkinson's disease, and other similar
diseases are neurological disorders caused by imbalance of chemical
messengers in the central nervous system. This disease can result
in loss of control over voluntary movement in the patient. People
who suffer from Parkinson's disease and Parkinsonism but are often
not positively affected by medication. Some of the well known
symptoms are resting tremor, i.e., shaking; muscular rigidity or
stiffness; slowness of movement, i.e., bradykinesia; inability to
initiate movement, stopping (freezing), i.e., akinesia; impairment
of a postural righting reflex, i.e., balance; and other mobility
difficulties. Other symptoms may include changes in gait while
walking, including shuffling of feet, short steps, difficulty with
turns, and decreased arm swing on the affected side. The usual
medical management strategy involves medication, and this often may
lead to a satisfactory and productive quality of life. A regular
exercise regimen will often be beneficial in reducing these
symptoms, as the muscular and skeletal system are not directly
affected by this disease, and exercise such as regular walking
increases blood flow to areas of the brain associated with learning
and remembering, formation of new connections between nerve cells,
and release of a family of proteins known as "nerve growth factors"
keeps the mind and body healthy. See, for example, "Mind, Mood
& Memory," Massachusetts General Hospital, vol. 1, no. 2, pp.
1-7, September 2005. However, walking can still be affected by
immobility or freezing.
[0006] Many people with Parkinson's Disease, or PD, periodically
experience a motor block episode, often called "freezing," (i.e.,
akinesa) in which the person is made immobile, with a feeling as if
his or her feet are "glued" to the floor. This can happen while
walking (e.g., when walking towards an obstacle or as others walk
towards them), and can lead to loss of balance and falls. The
occurrence of freezing is controlled somewhat by the patient's
medication, but can occur without warning in more advanced cases,
or in less advanced cases where the medication wears off. Adjusting
the PD medication will not always solve this problem. Freezing
episodes are sometimes triggered by visual stimuli, such as a
change in flooring patterns, or from observing a doorway or an
elevator door closing or opening. Freezing occurs rather frequently
when the patient is navigating through narrow passageways or small
spaces, even small rises or drops in elevation. Coping with
"freezing episodes" can be annoying and frustrating to the patient.
Where this happens frequently, the patient is often afraid to go
out or to engage in any sort of mobility activity.
[0007] Some compensating strategies that have been tried include
visualization techniques in which a patient imagining an object or
line on the floor and then steps over the imagined object as if it
were actually there. In practice, however, this strategy is often
not useful. Other strategies include changing the visual focus to a
distant point instead of looking directly down, counting a cadence
or marching in place, or rocking from side to side to break the
"freeze." These strategies can be successful for some PD patients,
but can lose their effectiveness over time. Therefore, these
strategies are not always useful to a person suffering from PD or
Parkinsonism. Furthermore, as Parkinsonism, PD, and the like, are
progressive diseases, eventually these strategies are not useful to
the afflicted person.
SUMMARY
[0008] Numerous embodiments disclosed herein advantageously address
the needs above as well as other needs by providing ambulatory
assistance systems and related methods.
[0009] One embodiment exemplarily described herein provides an
ambulatory assistance system that includes an article of footwear
adapted to be worn on a foot of a user; and a barrier coupled to
the article of footwear such that, when the article of footwear is
worn on a foot of the user, at least a portion of the barrier
extends into a visually engagable region that is adjacent to a
medial side of the one foot of the user, that is visible to the
user, and that lies in a path of movement of another foot of the
user.
[0010] In another embodiment, an ambulatory assistance system
includes an attachment adapted to be coupled to an article of
footwear, wherein each article of footwear is adapted to be worn on
a foot of a user; and a barrier coupled to the attachment such
that, when the article of footwear is worn on one foot of the user,
at least a portion of the barrier extends into a visually engagable
region that is adjacent to a medial side of the one foot of the
user, that is visible to the user, and that lies in a path of
movement of another foot of the user.
[0011] In still another embodiment, an ambulatory assistance system
includes a visual stimulation means for visually stimulating a
user; and means for coupling the visual stimulation means to a foot
of the user such that at least a portion of the visual stimulation
means extends into a visually engagable region that is adjacent to
a medial side of the foot of the user, that is visible to the user,
and that lies in a path of movement of another foot of the
user.
[0012] In yet another embodiment, an ambulatory assistance system
includes a pair of visual stimulation means for visually
stimulating the user; and means for coupling the pair of visual
stimulation means to respective articles of footwear such that,
when an article of footwear is worn on a foot of the user, at least
a portion of the visual stimulation means extends into a visually
engagable region that is adjacent to a medial side of the foot of
the user, that is visible to the user, and that lies in a path of
movement of another foot of the user.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The above and other aspects, features and advantages of
several embodiments disclosed herein will be more apparent from the
following more particular description thereof, presented in
conjunction with the following drawings.
[0014] FIG. 1A illustrates an external perspective view of a
portion of an ambulatory assistance system in accordance with one
embodiment;
[0015] FIG. 1B illustrates a cross-sectional view of a
multi-component barrier in accordance with one embodiment;
[0016] FIG. 1C illustrates an external perspective view of a
portion of an ambulatory assistance system in accordance with
another embodiment;
[0017] FIG. 1D illustrates an external perspective view of a
portion of an ambulatory assistance system in accordance with yet
another embodiment;
[0018] FIG. 2A illustrates a schematic view of the ambulatory
assistance system exemplarily shown in FIG. 1A, in accordance with
one embodiment;
[0019] FIG. 2B illustrates a schematic view of the ambulatory
assistance system in accordance with another embodiment;
[0020] FIG. 2C illustrates a perspective view of the ambulatory
assistance system shown in FIG. 2B when coupled to a user's foot,
either directly or via an article of footwear;
[0021] FIG. 3 illustrates one embodiment of a sensor subsystem
incorporated within the ambulatory assistance system shown in FIGS.
1A to 1D, 2A and 2B;
[0022] FIG. 4 illustrates one embodiment of a power subsystem
incorporated within the ambulatory assistance system shown in FIGS.
1A to 1D, 2A and 2B;
[0023] FIGS. 5A, 6A, and 7A illustrate front views describing an
exemplary operation of the ambulatory assistance system shown in
FIGS. 1A, 1C, 2A and 2B incorporating a stimulus driving subsystem
in accordance with one embodiment;
[0024] FIGS. 5B, 6B-6C, and 7B-7C schematically illustrate
relationships between the arrangement of a user's shoes, an
ambulatory characteristic detected by the visual stimulation
assemblies, and the operation of the ambulatory assistance system
as exemplarily illustrated in FIGS. 5A, 6A, and 7A,
respectively;
[0025] FIG. 8 illustrates an exemplary flow chart describing the
operation shown in FIGS. 5A-7C;
[0026] FIGS. 9, 10A and 10B illustrate other orientations of the
stimulus driving subsystem shown in FIGS. 5A-7C, in accordance with
other embodiments;
[0027] FIGS. 11A-11B illustrate external perspective views of an
ambulatory assistance system in accordance with other
embodiments;
[0028] FIGS. 12A-12B illustrate schematic views of an ambulatory
assistance system incorporated within the ambulatory assistance
system shown in FIGS. 11A and 11B, respectively, in accordance with
one embodiment;
[0029] FIGS. 13-15 illustrate an external perspective view of an
ambulatory assistance system in accordance with other
embodiments;
[0030] FIG. 16 illustrates a control signal generation regulator in
accordance with one embodiment;
[0031] FIG. 17 illustrates switching characteristics between high-
and low-states of a sensor signal generated by one embodiment of a
pressure-switch for use in an exemplary ambulatory assistance
system;
[0032] FIG. 18 illustrates an exemplary automatic method of
regulating the generation of control signals in accordance with
switching characteristics shown in FIG. 17;
[0033] FIGS. 19A and 19B illustrate front and schematic views
describing a relationship between the arrangement of a user's
shoes, an ambulatory characteristic detected by the visual
stimulation assemblies, and an exemplary operation of the
ambulatory assistance system;
[0034] FIG. 20 illustrates a perspective view of an ambulatory
assistance system coupled to a shoe in accordance with one
embodiment;
[0035] FIG. 21 illustrates a front elevation view of the ambulatory
assistance system shown in FIG. 21, without the shoe;
[0036] FIG. 22 illustrates a partial view of a variation of the
ambulatory assistance system shown in FIG. 21;
[0037] FIGS. 23A and 23B illustrate front elevation views of two
variations of the ambulatory assistance system shown in FIG.
21;
[0038] FIG. 24 illustrates a cross-sectional view of the hinge
shown in FIG. 21;
[0039] FIG. 25 illustrates a perspective view of an ambulatory
assistance system coupled to a shoe in accordance with another
embodiment;
[0040] FIG. 26 illustrates a perspective view of an ambulatory
assistance system coupled to an attachment in accordance with one
embodiment;
[0041] FIG. 27 illustrates a perspective view of an ambulatory
assistance system coupled to an attachment that is, in turn,
coupled to a user's shoe in accordance with one embodiment;
[0042] FIG. 28 illustrates an exploded perspective view of the
ambulatory assistance system shown in FIG. 27;
[0043] FIGS. 29A and 29B illustrate perspective views of an
ambulatory assistance system coupled to an attachment in accordance
with other embodiments;
[0044] FIG. 30 illustrates a perspective view of one embodiment of
an ambulatory assistance system in which an attachment body is
exemplarily coupled to the bottom of a user's shoe;
[0045] FIGS. 31-34 illustrate numerous exemplary embodiments in
which a barrier is coupled with the attachment body shown in FIG.
30;
[0046] FIG. 35 illustrates a perspective view of one embodiment of
an ambulatory assistance system in which an attachment body is
exemplarily coupled to a side of a user's shoe;
[0047] FIG. 36 illustrates an exploded perspective view of one
embodiment of the ambulatory assistance system shown in FIG.
35;
[0048] FIG. 37 illustrates a detailed view of an end of the barrier
shown in FIGS. 35 and 36;
[0049] FIG. 38 illustrates a perspective view of one embodiment of
a magnetic coupling system incorporated within an ambulatory
assistance system;
[0050] FIG. 39 illustrates an exemplary housing into which the
ambulatory assistance system can be incorporated;
[0051] FIGS. 40 and 41 illustrate walking assistance devices fitted
with the housing shown in FIG. 39;
[0052] FIG. 42 illustrates one embodiment of an ambulatory
assistance system coupled to a walker;
[0053] FIG. 43 illustrates a perspective view of one embodiment of
an ambulatory assistance system in which a magnetic attachment body
is exemplarily coupled to the bottom of a user's shoe;
[0054] FIG. 44 illustrates a perspective view of another embodiment
of an ambulatory assistance system in which a magnetic attachment
body is exemplarily coupled to the bottom of a user's shoe;
[0055] FIG. 45 illustrates a perspective view of still another
embodiment of an ambulatory assistance system in which a magnetic
attachment body is exemplarily coupled to the bottom of a user's
shoe; and
[0056] FIGS. 46A-C illustrate embodiments of an ambulatory
assistance system coupled to a leg of a walking assistance
device.
[0057] Corresponding reference characters indicate corresponding
components throughout the several views of the drawings. Skilled
artisans will appreciate that elements in the figures are
illustrated for simplicity and clarity and have not necessarily
been drawn to scale. For example, the dimensions of some of the
elements in the figures may be exaggerated relative to other
elements to help to improve understanding of various embodiments.
Also, common but well-understood elements that are useful or
necessary in a commercially feasible embodiment are often not
depicted in order to facilitate a less obstructed view of these
various embodiments.
DETAILED DESCRIPTION
[0058] The following description is not to be taken in a limiting
sense, but is made merely for the purpose of describing the general
principles of exemplary embodiments. The scope of the embodiments
disclosed herein should be determined with reference to the
claims.
[0059] Referring to FIG. 1A, an ambulatory assistance system, in
accordance with one embodiment, includes a stimulus driving
subsystem 100 coupled to a shoe 110 configured to be worn on the
user's right foot. Although the ambulatory assistance system is
illustrated as being used with a shoe 110, it will be appreciated
that ambulatory assistance systems in this and other embodiments
may implemented in conjunction with substantially any other article
of footwear (e.g., boot, sandal, sock, etc.) that can be worn on a
user's foot. Although FIG. 1A illustrates an ambulatory assistance
system implemented in conjunction with only one shoe 110, it will
be appreciated that the ambulatory assistance system may be
implemented in conjunction with a pair of shoes, wherein
complementary stimulus driving subsystems 100 are each coupled to a
particular shoe 110 of the pair of shoes. Either the single shoe or
the pair of shoes can be characterized as a walking assistance
device, i.e., a device that enables a user (e.g., the wearer of the
shoes) to walk over a walking surface (e.g., a floor, sidewalk,
street, etc.). As exemplary discussion of the ambulatory assistance
system implemented in conjunction with a pair of shoes will now be
provided in greater detail below.
[0060] In the illustrated embodiment, a particular stimulus driving
subsystem 100 includes a visual stimulus (e.g., a barrier) 102
coupled to a heel 112 of a particular shoe 110 via a stimulus
driver 104. According to many embodiments, the stimulus driver may
include, for example, a hinge and an actuator (not shown) connected
to the hinge, wherein the actuator is provided as a solenoid, a
motor (e.g., electric, pneumatic, etc.), or the like, and is
adapted to rotate the barrier 102 about the hinge. As will be
discussed in greater detail below, the actuator can be driven to
move the barrier 102 about the hinge between a visually engagable
position (i.e., a position where the user can observe the barrier
102 or otherwise be assured that the barrier 102 can be observed
and use the so-positioned barrier 102 as a visual stimulation tool
to overcome "freezing" episodes as described above) and a visually
disengagable position (i.e., a position where the barrier 102
provides little or no visual stimulation to a user). FIG. 1A
illustrates an exemplary visually engagable position that the
barrier 102 can be moved to, wherein the barrier extends away from
the shoe 110 and into a region where the user can observe the
barrier 102 (i.e., a visually engagable region). According to
various embodiments, the visually engagable region can be generally
characterized as a region proximate (e.g., over) a walking surface,
visible to the user, that is adjacent to the medial side of one
foot of the user and that lies in the path of movement of another
foot of the user so that the user can step over the barrier 102
when engaging in (or initiating) ambulatory movement. As used
herein, the term "medial" refers to the part of the user's foot
that is nearer to the center of the user's body. For example, the
medial side of a user's right foot is the side that is closest to
the user's left foot. In one embodiment, the visual stimulus (e.g.,
barrier 102) is generally oriented perpendicularly (i.e., at
substantially 90 degrees) with respect to the side of the user's
shoe 110. It will be appreciated, however, that the visual stimulus
can be oriented at substantially any other angle such that the
visual stimulus can be observed by the user and be used by the user
to stimulate ambulatory movement. Exemplary orientations and
positions of visually engagable regions will be illustrated in the
figures that follow.
[0061] According to various embodiments, the barrier 102 can be
brightly colored, reflective, have a surface formed of photo- or
electro-luminescent material, include light emitting devices (e.g.,
light emitting diodes, etc.), light transmitting structures (e.g.,
optical fibers, etc.), or the like, or combinations thereof, to
enhance the degree to which a user is visually stimulated by the
barrier 102. In one embodiment, at least a portion of the barrier
102 (e.g., the portion of the barrier 102 that is observable by the
user when the barrier 102 is in the visually engagable position) is
configured as described above to enhance the degree to which a user
is visually stimulated.
[0062] According to various embodiments, the barrier 102 is
provided as an elongated member (e.g., a rod, a coil spring, etc.)
having a longitudinal length, l, between about 11/2-6 inches and a
maximum transverse dimension of about 1/4-2 inches. It will be
appreciated, however, that the maximum transverse dimension of the
barrier 102 may as large or as small as desired. In one embodiment,
the barrier 102 can be either rigid or flexible yet
self-supporting. In another embodiment, the barrier 102 may be
formed of a hard material (e.g., a metal such as stainless steel or
aluminum, etc., wood, polymers, or the like, or combinations
thereof, a soft material (e.g., urethane, rubber foam, or the like,
or combinations thereof), or any combination thereof. In further
embodiments, the barrier 102 can be formed using one or more
components. An exemplary multi-component barrier 102 is illustrated
in FIG. 1B and includes a coil spring 152 encapsulated with a
flexible or elastic membrane 154.
[0063] In the embodiment shown in FIG. 1A, the shoe 110 includes a
heel 112, within which the visual stimulus driving subsystem 100 is
incorporated. It will be appreciated, however, that the shoe 110
may alternatively be provided with a sole 114 instead of a heel 112
and that the visual stimulus driving subsystem 100 can be
incorporated within a rear region 114a of the sole 114 of the shoe
110 (see, for example, FIG. 1C) or at some intermediate region 114b
(e.g., the instep) between the rear portion of the shoe 110 and the
front portion of the shoe 110 (see, for example, FIG. 1D).
[0064] Referring to FIG. 2A, and in accordance with various
embodiments, the ambulatory assistance system includes a pair of
complementary visual stimulation assemblies (e.g., first and second
visual stimulation assemblies 200a and 200b, respectively, wherein
either of the first or second visual stimulation assemblies 200a or
200b can generically be referred to as a visual stimulation
assembly 200), wherein each visual stimulation assembly 200 is
coupled to a particular shoe 110 in the pair of shoes. According to
various embodiments, the aforementioned stimulus driving subsystem
100 is but one component of each particular visual stimulation
assembly 200. Thus, each first and second visual stimulation
assembly 200a and 200b further includes a controller subsystem 202
(also referred to generically as a "controller"), a main sensor
subsystem 204a (also referred to generically as a "main sensor"), a
communications subsystem 206 (also referred to generically as a
"communications system"), and a power subsystem 208. In one
embodiment, and as will be discussed in greater detail below, each
first and second visual stimulation assembly 200a and 200b may
further include an auxiliary sensor subsystem 204b (also referred
to generically as an "auxiliary sensor") incorporated within the
sole of each shoe 110.
[0065] In the embodiment shown in FIG. 2A, the controller subsystem
202 and the communications subsystem 206 of each first and second
visual stimulation assembly 200a and 200b is incorporated within
the heel 112 of a respective shoe 110. It will be appreciated,
however, that these subsystems, in addition to the main sensor
subsystem 204a, the power subsystem 208, and the auxiliary sensor
subsystem 204b, can also be coupled to, or formed, or located
within any portion of a shoe (e.g., the bottom, side, or top
portions of the shoe, the tongue, a sole where provided, etc.) via
any suitable means. For example, and with reference to FIGS. 2B and
2C, each visual stimulation assembly 200 can be incorporated within
a main body of a platform 210 that is adapted to be detachably
coupled (e.g., attached) to the bottom of an object 216 (e.g., an
article of footwear such as a user's shoe as those illustrated in
FIGS. 1A, 1C, and 1D, a user's foot, etc.) via a rear stabilization
member 212 and front stabilization member 214. As illustrated, the
rear stabilization member 212 is adapted to be secured around a
user's ankle and thus secure the rear portion of the platform 210
to the heel 112 of the user's shoe 110 and the front stabilization
member 214 is adapted to be secured around a users foot and thus
secure the front portion of the platform 210 to the sole of the
user's shoe 110. Once platform 210 is secured to the object 216, it
will be appreciated that the main sensor subsystem 204a and the
auxiliary sensor subsystem 204b operate in substantially the same
manner as the components would when incorporated within the actual
shoe 110. As both the platform 210 and the shoe 110 are adapted to
be worn on a user's foot, the platform 210 and the shoe 110 can be
generally characterized as articles of footwear.
[0066] It will be appreciated that the rear and front stabilization
members 212 and 214 illustrate but one example by which the
platform 210 can be attached to a user's shoe and that any other
means may be employed to replace the rear and front stabilization
members 212 and 214. For example, the platform 210 can also be
attached to a user's shoe using, for example, pairs of opposing
clips slidably coupled to the platform 210 and adapted to engage
opposing sides of the user's shoe 110. It will be appreciated that
the platform 210 can be attached to the user's shoe via any other
known means (e.g., via laces, snaps, buckles, Velcro, zipper,
magnets, etc.).
[0067] According to numerous embodiments, the barrier 102 of each
visual stimulation assembly 200 can be moved about the hinge of
stimulus driver 104 between the aforementioned visually engagable
and disengagable positions. In one embodiment, the actuator of the
stimulus driver is coupled to the controller subsystem 202 and can
be driven in accordance with control signals output by the
controller subsystem 202 to move (e.g., rotate) the barrier 102
between the visually engagable and disengagable positions. It will
be appreciated that numerous types and configurations of actuators
are known in the art to be suitable for use in the present
invention and may include miniature electric motors, pneumatic
motors, solenoids, and the like, or combinations thereof. For
example, the stimulus driver illustrated in FIGS. 1A-1D and FIGS.
2A-2B may be provided as disclosed in U.S. Patent App. Pub. No.
2005/0050683 A1 to Tonogai, which is incorporated by reference as
if fully set forth herein. Moreover, it will be appreciated that
the stimulus driver 104 has merely been disclosed as an actuator
coupled to a hinge and that the stimulus driver can be provided as
substantially any other device capable of moving the barrier 102
between visually engagable and disengagable positions in response
to control signals output by a controller subsystem 202.
[0068] According to numerous embodiments, the controller subsystem
202 of the first visual stimulation assembly 200a is provided with
circuitry adapted to drive the stimulus driving subsystem 100 of
the first visual stimulation assembly 200a in accordance with main
sensor signals generated by the main sensor subsystem 204a of the
first visual stimulation assembly 200a. Similarly, the controller
subsystem 202 of the second visual stimulation assembly 200b is
provided with circuitry adapted to drive the stimulus driving
subsystem 100 of the second visual stimulation assembly 200b in
accordance with main sensor signals generated by the main sensor
subsystem 204a of the second visual stimulation assembly 200b. As
used herein, the term "circuitry" can refer to any type of
executable instructions that can be implemented as, for example,
hardware, firmware, and/or software, which are all within the scope
of the various teachings described.
[0069] In one embodiment, a particular controller subsystem 202
drives a corresponding stimulus driving subsystem 100 by
transmitting control signals to the stimulus driver associated
therewith. In another embodiment, the control signals instruct the
actuator of the stimulus driver 104 to move (e.g., rotate) the
barrier 102 about the hinge to the visually disengagable position
when, as will be discussed in greater detail below, a received main
sensor signal indicates a high-state and instruct the actuator of
the stimulus driver 104 to move (e.g., rotate) the barrier about
the hinge to the visually engagable position when, as will be
discussed in greater detail below, a received main sensor signal
indicates a low-state.
[0070] According to numerous embodiments, the main sensor subsystem
204a of the first visual stimulation assembly 200a is adapted to
detect an ambulatory characteristic imparted to a corresponding
shoe 110 and includes circuitry adapted to generate a first main
sensor signal representing the detected ambulatory characteristic.
Similarly, the main sensor subsystem 204a of the second visual
stimulation assembly 200b is adapted to detect an ambulatory
characteristic imparted to a corresponding shoe 110 and includes
circuitry adapted to generate a second main sensor signal
representing the detected ambulatory characteristic. As used
herein, the term "ambulatory characteristic" refers to an attribute
that characterizes some aspect of a user's walk. In one embodiment,
an ambulatory characteristic is indicative of whether the user is
lifting a shoe over the walking surface to initiate a step or the
whether user is placing the shoe down onto the walking surface to
complete a step. Accordingly, the main sensor subsystem 204a of the
first and second visual stimulation assemblies 200a and 200b can,
in one embodiment, be adapted to sense an application of a force
applied by a user's foot to the heel 112 of a shoe 110.
[0071] Referring to FIG. 3, in one embodiment, the main sensor
subsystem 204a includes a pressure sensitive-switch 302 coupled to
the controller subsystem 202 and a pin actuator 304 coupled to the
pressure-sensitive switch 302 and adapted to receive a force
imparted by a portion of a user's foot 306 (e.g., the cacaneus, or
large heel bone) toward a walking surface 308.
[0072] In the illustrated embodiment, the pressure-sensitive switch
302 is provided as a normally-closed switch. Thus, when a force
exceeding a predetermined threshold is applied to the pin actuator
304 by the user's foot 306 (e.g., when the user is standing, when
the user's weight is substantially arranged over the heel 112,
etc.), the pressure-sensitive switch 302 is open and a main sensor
signal indicating a low-state is generated. When a force less than
the predetermined threshold is applied to the pin actuator 304 by
the user's foot (e.g., when the user lifts the heel 112 over the
walking surface 308, when the user's weight is shifted away from
the heel 112, etc.), the pressure-sensitive switch 302 becomes
closed and a main sensor signal indicating a high-state is
generated. It will be appreciated that the placement and general
configuration of the main sensor subsystem 204a described above
with respect to FIG. 3 can be adjusted as desired to ensure that a
main sensor signal indicating a high-state will be generated when
the user lifts the heel 112 over the walking surface 308 by a
predetermined amount or when the user's weight is otherwise shifted
away from the heel 112 by a predetermined amount. Such adjustments
are known in the art and are described, for example, in U.S. Pat.
No. 5,303,485 to Goldston et al., which is incorporated by
reference as if fully set forth herein.
[0073] In one embodiment, the auxiliary sensor subsystem 204b is
substantially identical to the main sensor subsystem 204a and is
adapted to sense an application of a force applied by a user's foot
to the sole region of a shoe 110.
[0074] Referring back to FIG. 2A, the communications subsystem 206
of the first visual stimulation assembly 200a is provided as any
suitable type of receiver capable of receiving signals from a
manually operable control signal generation regulator, discussed in
greater detail below with respect to FIG. 16. Similarly, the
communications subsystem 206 of the second visual stimulation
assembly 200b is provided as any suitable type of receiver capable
of receiving signals from the manually operable control signal
generation regulator. In one embodiment, the communications
subsystems 206 of the first and second visual stimulation
assemblies 200a and 200b are adapted to receive the signals
wirelessly.
[0075] According to numerous embodiments, the power subsystem 208
is provided with any suitable battery capable of providing an
operating power to the subsystems described above. Further, the
power subsystem 208 may be configured so as to permit replacement
of depleted batteries. For example, and with reference to FIG. 4,
the power subsystem 208 includes a battery housing 402, battery
contacts 404 and 406 extending into recess 408 defined within the
battery housing 402, and a protector cap 410. The recess 408 is
adapted to receive a battery 412 in addition to the protector cap
410. Once the battery 412 is received within the recess 408, the
battery contacts 404 and 406 receive one of two voltage terminals
of the battery 412 and complete an electrical circuit to provide
power to the subsystems within a visual stimulation assembly. The
power subsystem 204 is electrically coupled to the controller
subsystem 202 via well known means.
[0076] An exemplary operation of the ambulatory assistance system
described above with respect to FIGS. 1A and 1C and 2A-2B will now
be discussed in greater detail with respect to FIGS. 5A to 7C.
Concurrent reference is also made to the flow chart of FIG. 8.
[0077] As generally shown in FIGS. 5A to 7C, an ambulatory
assistance system includes a pair of complementary stimulus driving
subsystems 100 (e.g., first and second stimulus driving subsystems
100a and 100b, respectively), wherein each stimulus driving
subsystem 100 is coupled to one of a pair of complementary shoes
110 (e.g., first and second shoes 110a and 110b, respectively). As
described above, each of the first and second stimulus driving
subsystems 100a and 100b include first and second barriers 102a and
102b, respectively, and first and second stimulus drivers 104a and
104b (only hinges shown), respectively. Although not shown, it is
appreciated that each of the first and second stimulus driving
subsystems 100a and 100b are respective components of particular
visual stimulation assemblies (e.g., first and second visual
stimulation assemblies 200a and 200b, as shown in FIG. 2).
[0078] FIGS. 5A and 5B illustrate an embodiment where, for example,
a control signal generation regulator 1600 (discussed in greater
detail below with respect to FIG. 16) has been manipulated by a
user to generate, for example, an on/off signal causing the
controller subsystems of the first and second visual stimulation
assemblies to output control signals in response to main sensor
signals output by their associated main sensor subsystems.
Accordingly, FIGS. 5A and 5B illustrate the result where a force
exceeding the predetermined threshold is applied to main sensor
subsystems of both the first and second visual stimulation
assemblies and the first and second barriers 102a and 102b are
located in a visually engagable position 502.
[0079] Specifically, FIG. 5A illustrates a front view of the
ambulatory assistance system while FIG. 5B schematically
illustrates an exemplary arrangement of the first and second shoes
110a and 110b when the first and second barriers 102a and 102b are
located in the visually engagable position 502 shown in FIG. 5A.
Although the first and second barriers 102a and 102b are generally
illustrated in FIG. 5B as being coupled to the heel 112 of the
first and second shoes 110a and 110b, it will be appreciated that
the first and second barriers 102a and 102b may be coupled anywhere
along the length of the instep of the first and second shoes 110a
and 110b and, in some embodiments, to the front of the respective
first and second shoes 110a and 110b. As shown in FIG. 5B, the user
is standing with the first and second shoes 110a and 110b together
while applying a force, in excess of the predetermined threshold,
to the main and auxiliary sensor subsystems of the first and second
visual stimulation assemblies (e.g., as indicated by the shaded
heel 112 and sole of the first and second shoes 110a and 110b).
[0080] Because the user is applying a force exceeding the
predetermined threshold to main sensor subsystems of both the first
and second visual stimulation assemblies in FIGS. 5A and 5B, the
main sensor subsystems of the first and second visual stimulation
assemblies generate first and second main sensor signals,
respectively, both indicating a low-state. Moreover, because the
user is applying a force exceeding the predetermined threshold to
auxiliary sensor subsystems of both the first and second visual
stimulation assemblies in FIGS. 5A and 5B, the auxiliary sensor
subsystems of the first and second visual stimulation assemblies
generate first and second auxiliary sensor signals, respectively,
both indicating a low-state. As will be discussed in greater detail
below, auxiliary sensor signals indicating a low-state may be used
in automatically regulating an operation of the controller
subsystems in each of the first and second visual stimulation
assemblies.
[0081] Within the first visual stimulation assembly 200a, the first
main sensor signal is transmitted from the main sensor subsystem to
the controller subsystem. Upon receipt of the main sensor signal
indicating the low-state (see step 802 in FIG. 8), the controller
subsystem outputs a control signal instructing the actuator of the
first stimulus driver 104a to move (e.g., rotate) the barrier 102a
to the visually engagable position indicated at 502 (see step 804
in FIG. 8). In response, the actuator of the first stimulus driving
subsystem 100a moves (e.g., rotates) the barrier 102a about the
hinge of the first stimulus driver 104a to the visually engagable
position 502 (see step 806 in FIG. 8). A process similar to that
described above is also performed to ultimately move (e.g., rotate)
the barrier 102b of the second visual stimulation assembly 200b in
accordance with a second main sensor signal generated by the main
sensor subsystem therein. FIGS. 5B, 6B-6C, and 7B-7C further
illustrate wherein the visually disengagable position 602 is
located within a visually engagable region 504, proximate to a
respective shoe and observable by the user.
[0082] FIGS. 6A-6C and 7A-7C illustrate embodiments wherein a force
less than the predetermined threshold is applied to the main sensor
subsystem of one visual stimulation assembly (e.g., the second
visual stimulation assembly as shown in FIGS. 6A-6C or first visual
stimulation assembly as shown in FIGS. 7A-7C) and a force exceeding
the predetermined threshold is applied to the main sensor subsystem
of the other visual stimulation assembly (e.g., the first visual
stimulation assembly as shown in FIGS. 6A-6C or second visual
stimulation assembly as shown in FIGS. 7A-7C). Therefore, FIGS.
6A-6C and 7A-7C illustrate embodiments wherein one of the first and
second barriers 102a and 102b is located in a visually disengagable
position 602 and the other of the first and second barriers 102a
and 102b is located in the visually engagable position 502.
[0083] Specifically, FIGS. 6A and 7A illustrate front views of the
ambulatory assistance system and FIGS. 6B-6C and 7B-7C
schematically illustrate exemplary arrangements of the first and
second shoes 110a and 110b when one of the first and second
barriers 102a or 102b is located in the visually engagable position
502 and the other of the first and second barriers 102a or 102b is
located in the visually disengagable position 602. As shown in FIG.
6B, the user is initiating a step (e.g., from the arrangement
illustrated in FIG. 5B) and has, therefore, either applied a force
less than the predetermined threshold (e.g., as indicated by the
unshaded heel 112 of the second shoe 110b--the trailing shoe) to
the main sensor subsystem of the second visual stimulation assembly
while maintaining the heel 112 of the second shoe 110b on the
walking surface 308 or has completely lifted the heel 112 of the
second shoe (i.e., the trailing shoe) over the walking surface 308.
As shown in FIG. 6C, the user is in the process of completing a
step (e.g., from the arrangement illustrated in FIG. 6B) using the
first barrier 102a provided in the visually engagable position 502
as a visual stimulation tool to help overcome a freezing episode.
Accordingly, the user has applied a force less than the
predetermined threshold (e.g., as indicated by the unshaded sole of
the second shoe 110b) to the auxiliary sensor subsystem of the
second visual stimulation assembly by completely lifting the sole
of the second shoe (i.e., the trailing shoe) over the walking
surface 308.
[0084] Because the user is applying a force less than the
predetermined threshold to the main sensor subsystem of the second
visual stimulation assembly to the second shoe 110b (i.e., the
trailing shoe) as shown in FIGS. 6B and 6C, the main sensor
subsystem of the second visual stimulation assembly generates a
second main sensor signal indicating a high-state. Moreover,
because the user is applying a force less than the predetermined
threshold to the auxiliary sensor subsystem of the second visual
stimulation assembly to the second shoe 110b (i.e., the trailing
shoe) as shown in FIG. 6C, the auxiliary sensor subsystem of the
second visual stimulation assembly generates a second auxiliary
sensor signal indicating a high-state. As will be discussed in
greater detail below, auxiliary sensor signals indicating a
high-state may be used in automatically regulating an operation of
the controller subsystems in each of the first and second visual
stimulation assemblies.
[0085] Within the second visual stimulation assembly 200b, the
second main sensor signal is transmitted from the main sensor
subsystem to the controller subsystem. Upon receipt of the second
main sensor signal indicating the high-state, the controller
subsystem generates a control signal adapted to instruct the
actuator of the second stimulus driver 104b to move (e.g., rotate)
the barrier 102b to the visually disengagable position 602.
[0086] As shown in FIG. 6C, the first barrier 102a can be observed
by the user within the visually engagable region 504 and thus be
used as a visual stimulation tool to assist the user to complete a
step taken with the fully raised second shoe 110b.
[0087] As discussed above, the barrier 102b is moved to the
visually disengagable position 602 when the second main sensor
signal indicates a high-state. In another embodiment of present
invention, however, the controller subsystem of the second visual
stimulation assembly 200b generates the control signal adapted to
instruct the actuator of the second stimulus driver 104b to move
(e.g., rotate) the barrier 102b to the visually disengagable
position 602 upon receipt of both main and auxiliary sensor signals
indicating a high-state. Accordingly, the barrier 102b is moved to
the visually disengagable position 602 only when the second shoe
110b is fully raised over the walking surface 308.
[0088] Upon completion of the step with the second shoe 110b, an
arrangement of the user's shoes 110a and 110b can be similar to
that shown in FIG. 5B or as shown in FIG. 7B (e.g., the first shoe
110a is the trailing shoe and the second shoe 110b is the leading
shoe). Accordingly, a force exceeding the predetermined threshold
is applied to the main sensor subsystem of the second visual
stimulation assembly and a second main sensor signal representing a
low-state is generated and output to the controller subsystem. In
response to the second main sensor signal indicating a low-state,
the controller subsystem generates a control signal adapted to
instruct the actuator of the second stimulus driver 104b to move
(e.g., rotate) the second barrier 102b to the visually engagable
region 502 as shown in FIG. 5A.
[0089] The operational results exemplarily illustrated in FIGS.
6A-6C and 7A-7C are attained through equivalent processes within
the first and second visual stimulation assemblies. Accordingly,
the aforementioned process can be repeated as the user initiates
and completes a step with the first shoe 110a and as the user
alternately initiates and completes successive steps alternating
between the first and second shoes 110a and 110b. When used as
described above, the ambulatory assistance assembly disclosed
herein enables the user to walk in a manner that is as normal as
possible.
[0090] As discussed with respect to the illustrated embodiments of
FIGS. 5A to 7C, each of the first and second stimulus drivers 104a
and 104b is provided with a hinge oriented in such a manner
enabling a corresponding barrier 102 to be moved (e.g., rotated)
vertically between the visually disengagable and visually engagable
regions. Accordingly, the hinge of each stimulus driver pivots
about a substantially horizontal axis to move the barrier 102
between the visually disengagable and engagable positions 502 and
602, respectively. However, it will be appreciated that each hinge
described above with respect to FIGS. 5A to 7C may be oriented as
desired in such a manner enabling a corresponding barrier to be
moved (e.g., rotated) along substantially any direction between the
visually disengagable and visually engagable positions. For
example, one or more stimulus driving subsystems 100 within the
ambulatory assistance system may include a stimulus driver as shown
in FIG. 9. Such a stimulus driver includes a hinge 900 coupled to
the heel 112 and oriented in such a manner enabling the barrier 102
to be moved (e.g., rotated) between the visually disengagable and
visually engagable positions 902 and 904, respectively.
Accordingly, the hinge 900 pivots about a substantially vertical
axis to move the barrier 102 between the visually disengagable and
engagable positions 902 and 904, respectively. In another
embodiment, one or more stimulus driving subsystems 100 within the
ambulatory assistance system may include a stimulus driver as shown
in FIG. 10A. Such a stimulus driver includes a hinge 1000 coupled
to a front region of the shoe 110 and oriented in such a manner
enabling the barrier 102 to be moved (e.g., rotated) horizontally
between the visually disengagable and visually engagable positions
1002 and 1004, respectively. In another embodiment, one or more
stimulus driving subsystems 100 within the ambulatory assistance
system may include a stimulus driver as shown in FIG. 10B. Such a
stimulus driver includes a hinge 1006 coupled to a front region of
the shoe 110 and oriented in such a manner enabling the barrier 102
to be moved (e.g., rotated) horizontally between the visually
disengagable and visually engagable regions 1008 and 1010,
respectively. Although not explicitly shown, it will be appreciated
that actuators coupled to hinges 1000 and 1006 may be electrically
connected to the controller subsystem 202 via any suitable means
(e.g., via wires embedded within the shoe 110 between the hinge
1000 and the controller 202 disposed within the heel 112).
[0091] As discussed above with respect to the embodiments of FIGS.
1A to 10B, an ambulatory assistance system may include one or more
stimulus driving subsystems 100 employing a stimulus driver having
an actuator coupled to a hinge that is, in turn, coupled between
the user's shoe 110 and the barrier 102, wherein the barrier 102 is
rotatably moved between a visually disengagable position and a
visually engagable position within a visually engagable region. It
will readily be appreciated that, however, that each stimulus
driving subsystem can linearly move a respective barrier 102
between the visually disengagable position and the visually
engagable position within the visually engagable region.
[0092] For example, and with reference to FIG. 11A, a stimulus
driving subsystem 1100 includes a stimulus driver adapted to
linearly move a barrier 102 into, and out of the heel 112 along the
direction indicated at 1102 between a visually disengagable
position (e.g., within the heel 112) and the visually engagable
position within a visually engagable region proximate to the heel
112. In another embodiment, and with reference to FIG. 11B, a
stimulus driving subsystem 1104 includes stimulus driver adapted to
linearly move a barrier 102 into, and out of a shoe housing 1106
along the direction indicated at 1108 between a visually
disengagable position (e.g., within the shoe housing 1106) and the
visually engagable position within a visually engagable region
proximate to the front portion of the shoe 110.
[0093] Referring to FIG. 12A, the stimulus driving subsystem 1100
shown in FIG. 11A includes a barrier guide 1202 formed within a
portion of the shoe 110 (e.g., within the heel 112) and adapted to
receive the barrier 102, and a stimulus driver (herein provided as
a solenoid, a energized rack/pinion assembly, etc., 1204) coupled
to an end of the barrier 102 via a connection rod 1206 and adapted
to move the barrier 102 along the path indicated at 1102.
Similarly, and with reference to FIG. 12B, the stimulus driving
subsystem 1104 shown in FIG. 11B includes a barrier guide 1208
formed within the shoe housing 1106 and adapted to receive the
barrier 102, and a stimulus driver (herein provided as a solenoid.
1204) coupled to an end of the barrier 102 via a connection rod
1206 and adapted to move the barrier 102 along the path indicated
at 1108. In another embodiment, the solenoid/connection rod
assembly can be replaced by any other suitable mechanism (e.g., a
energized rack/pinion assembly, pneumatic system, hydraulic system,
or the like, or combinations thereof.
[0094] According to the embodiment illustrated in FIGS. 11A-11B and
12A-12B, the solenoid 1204 can project the barrier 102 from within
a visually disengagable position within the barrier guide 1202 to a
visually engagable position within a visually engagable region
outside, for example, the heel 112 along the path indicated at 1102
or the front portion of the shoe 110 along the path indicated at
1108, in response to the aforementioned control signals output by
the controller subsystem 202. For example, upon receiving a main
sensor signal indicating a high-state, the controller subsystem of
a particular visual stimulation assembly outputs a control signal
to the solenoid 1204, causing the solenoid to bias the connection
rod 1206 toward an exterior of the heel 112 which, in turn, causes
the barrier 102 to move through the barrier guide along the
direction indicated at 1102 (or 1108) and to a visually engagable
position within a visually engagable region proximate to the heel
112 (or the front portion of the shoe 110). Upon receiving a main
sensor signal indicating a low-state, the controller subsystem of a
particular visual stimulation assembly outputs a control signal to
the solenoid 1204, causing the solenoid to bias the connection rod
1206 toward an interior of the heel 112 which, in turn, causes the
barrier 102 to move through the barrier guide along the direction
indicated at 1102 (or 1108) and to a visually disengagable position
within the heel 112 (or within the shoe housing 1106).
[0095] It will be appreciated that numerous types and
configurations of solenoids are known in the art to be suitable for
use in the embodiments disclosed herein. For example, the solenoid
1204 illustrated in FIGS. 12A and 12B may be provided as a
latching-type solenoid. Moreover, it will be appreciated that the
solenoid 1204 has merely been disclosed as an exemplary stimulus
driver and that substantially any other device capable of moving
the barrier 102 along the path indicated at 1102 (or 1108) in
response to control signals output by a controller subsystem 202
may be used to replace the solenoid described above.
[0096] As discussed above with respect to the embodiments of FIGS.
1A to 12B, an ambulatory assistance system may include one or more
stimulus driving subsystems incorporating a barrier-type visual
stimulus 102 that a user can visually engage solely because it has
a discrete boundary and occupies a physical space within a visually
engagable region. It will be appreciated, however, that an
ambulatory assistance system may also be fitted with one or more
stimulus driving subsystems that incorporate other types of visual
stimuli having similar discrete boundaries, such as a light-type
visual stimulus.
[0097] For example, an ambulatory assistance system may be provided
with one or more stimulus driving subsystems as shown in FIG. 13.
Such a stimulus driving subsystem includes a visual stimulus (e.g.,
light projected to illuminate and/or reflect from the walking
surface 308) 1302 at a visually engagable region ahead of a user's
shoe 110 and a stimulus driver (e.g., a front-facing laser) 1304
adapted to project the light 1302 onto the walking surface 308. In
another embodiment shown in FIG. 14, the reflected light 1302 may
be projected onto a visually engagable region of the walking
surface 308 between a pair of the user's shoes by stimulus driver
implemented as a side-facing laser 1402.
[0098] According to the embodiments exemplarily illustrated in
FIGS. 13 and 14, the lasers 1304 and 1402 can be coupled to the
shoe 110 (e.g., at an upper portion thereof. In one embodiment, the
lasers 1304 and 1402 can be integrally formed with the shoe 110 or
can be attached to the shoe 110 via any known means (e.g., as
disclosed in any of U.S. Patent App. Pub. No. 2004/0103563 A1 to
Linge, U.S. Patent App. Pub. No. 2004/0100792 A1 to Trzecieski,
U.S. Pat. No. 5,664,346 to Barker, U.S. Pat. No. 3,067,322 to Sala,
each being incorporated by reference as if fully set forth herein).
As shown, the lasers 1304 and 1402 can be provided as any suitable
device adapted to project a discrete pattern of light (e.g., a
line, a dot, etc.), oriented in substantially any desired manner,
onto the walking surface 308 at a visually engagable region ahead
of, or beside a user's shoe 110. Although not explicitly shown, it
will be appreciated that the lasers 1304 and 1402 may be
electrically connected to the controller subsystem 202 via any
suitable means (e.g., via wires 1306 embedded within the shoe 110
between the laser 1304 or 1402 and the controller 202 disposed
within the heel 112).
[0099] In another example, an ambulatory assistance system may be
provided with one or more stimulus driving subsystems as shown in
FIG. 15. Such a stimulus driving subsystem includes a visual
stimulus (e.g., emitted light) 1502 projected from a visually
engagable region of a user's shoe 110 and a stimulus driver (e.g.,
one or more light emitting diodes, optical fibers,
electroluminescent display device, or the like, or combinations
thereof 1504 adapted to generate the emitted light 1502.
[0100] According to various embodiments, the light-type visual
stimuli described above with respect to FIGS. 13 to 15, can be
driven (e.g., turned on and off) in a manner as exemplarily
described in FIGS. 5A-7C and can be driven so as to provide a
visual stimulus that is either continuously or intermittently
visually engagable by the user.
[0101] For example, when a user is applying a force, in excess of
the predetermined threshold, to the main sensor subsystems of the
first and second visual stimulation assemblies (e.g., as shown in
FIG. 5B), the main sensor subsystems of the first and second visual
stimulation assemblies generate first and second main sensor
signals, respectively, both indicating a low-state. Upon ultimately
receiving the first and second main sensor signals indicating the
low-state, the controller subsystems of the first and second visual
stimulation assemblies, respectively, output control signals
causing a stimulus driver (e.g., any of stimulus drivers 1304 or
1402, or 1504) connected thereto, to be turned on. When the
stimulus drivers 1304, 1402, or 1504 are turned on (e.g., as shown
in FIGS. 13-15), light 1302 or 1502 can be observed by the user and
used as a visual stimulation tool to overcome "freezing" episodes
as described above.
[0102] When a force less than the predetermined threshold is
applied to the sensor subsystem of one visual stimulation assembly
and a force exceeding the predetermined threshold is applied to the
sensor subsystem of the other visual stimulation assembly (e.g., as
shown in FIGS. 6B-6C or 7B-7C), the sensor subsystem receiving less
than the predetermined threshold of the force (e.g., the sensor
subsystem within the second visual stimulation assembly as shown in
FIGS. 6B or 6C or the sensor subsystem within the first visual
stimulation assembly as shown in FIGS. 7B or 7C) generates a sensor
indicating a high-state. Upon receiving the first and second main
sensor signals indicating the high-state, the controller subsystems
of the first and second visual stimulation assemblies,
respectively, output control signals causing a stimulus driver
(e.g., any of stimulus drivers 1304 or 1402, or 1504) connected
thereto, to be turned off. When the stimulus drivers 1304, 1402, or
1504 are turned off, light is not observable to the user within a
visually engagable region
[0103] According to various embodiments, the generation of control
signals by a particular controller subsystem 202 can be regulated.
Accordingly, a particular controller subsystem 202 can be: 1)
selectively activated before a user begins to walk to permit the
generation of control signals in response to received main sensor
signals or otherwise; 2) selectively deactivated after a user has
started walking and does not require ambulatory assistance (e.g.,
after the user has attained a desired rhythm in his or her walk,
when a user is sitting, when the shoes 110 are not being worn,
etc.) to prevent the generation of control signals; and 3)
selectively re-activated as in step 1, when the user is walking, in
anticipation of a freezing episode (e.g., as a user approaches a
corner, steps, a narrow space, or other perceived obstacle to
ambulatory movement) to permit the generation of control signals in
response to received main sensor signals.
[0104] For example, and with reference to FIG. 16, the ambulatory
assistance system may include a control signal generation regulator
1600 adapted to communicate with the controller subsystems of each
visual stimulation assembly. In the illustrated embodiment, the
control signal generation regulator 1600 is external to the first
and second visual stimulation assemblies 200a and 200b,
respectively, and includes a housing 1602 enclosing at least one
switch 1604 coupled to a transmitter 1606.
[0105] In the embodiment shown in FIG. 16, the housing 1602 can be
configured to be held by the user and stored, for example, in the
user's pocket, attached to a strap adapted to encircle a user's
wrist, neck, waist, belt, etc. The switch 1604 is adapted to be
manually operated (e.g., pressed) by a user to generate an on/off
signal that is transmitted from the transmitter 1606 to the
controller subsystems of the complementary visual stimulation
assemblies via respective communications subsystems included
therein. In response to the manually generated on/off signal,
controller subsystems 202 are either prevented from generating
control signals in response to main sensor signals (and are thus
deactivated with respect to the main sensor subsystem 204a) or are
permitted to generate control signals in response to main sensor
signals (and are thus activated or re-activated with respect to the
main sensor subsystem 204a). Accordingly, the manually generated
on/off signal regulates generation of the control signals by the
controller subsystems 202 in response to main sensor signals output
by main sensor subsystems 204a associated therewith.
[0106] In another embodiment, the switch 1604 can be coupled to
voice recognition circuitry and a microphone embedded within the
housing 1602 and can thus be adapted to generate the on/off signals
in response to voice commands issued by the user. It will be
appreciated, however, that the control signal generation regulator
1600 can be provided as substantially any device capable of
transmitting on/off signals in response to substantially any input
by the user.
[0107] As described above, the control signal generation regulator
1600 is adapted to transmit on/off signals to the first and second
visual stimulation assemblies 200a and 200b simultaneously. It will
be appreciated, however, that the control signal generation
regulator 1600 may be adapted to transmit on/off signals to the
first and second visual stimulation assemblies 200a and 200b
individually. For example, the control signal generation regulator
1600 can be provided with two switches 1604 wherein a first switch
is adapted to generate and transmit an on/off signal to the first
visual stimulation assembly 200a and a second switch 1604 is
adapted to generate and transmit an on/off signal to the second
visual stimulation assembly 200b. In another embodiment, a third
switch 1604 may supplement the first and second switches 1604 to
generate and transmit an on/off signal to the first and second
visual stimulation assemblies 200a and 200b simultaneously.
[0108] As described above, the control signal generation regulator
1600 is adapted to selectively deactivate and activate (or
re-activate) a controller subsystem 202 with respect to an
associated main sensor subsystem 204a (and/or auxiliary sensor
subsystem 204b). In another embodiment, however, the control signal
generation regulator 1600 may include one or more switches 1604
adapted to generate a stimulus deployment signal that can be
transmitted from the transmitter 1606 to one or both controller
subsystems of the first and second visual stimulation assemblies
200a and 200b. In response to the manually generated stimulus
deployment signal, controller subsystems 202 output control signals
driving the stimulus driver associated therewith independently of
main sensor signals transmitted by associated main sensor
subsystems 204a. Accordingly, stimulus deployment signals may be
used to control the operation of controller subsystems 202
independently of any sensor subsystem. This mode eliminates the
need for sensor subsystems and the logic system associated with
them.
[0109] As discussed above, controller subsystems within the
ambulatory assistance system can be manually activated,
deactivated, and re-activated with respect to their associated main
sensor subsystems 402a using a control signal generation regulator
1600. In one embodiment, and as exemplarily discussed below with
respect to FIGS. 17 and 18, the controller subsystems can be
automatically deactivated and re-activated to automatically
regulate the ability of controller subsystems to generate control
signals based on main sensor signals generated by associated main
sensor subsystems 204a.
[0110] For example, the controller subsystem 202 of the
aforementioned first visual stimulation assembly 200a can be
provided with control signal generation regulator circuitry adapted
to detect a switch between high- and low-states in a first
auxiliary sensor signal generated by the auxiliary sensor subsystem
204b of the first visual stimulation assembly 200a. Similarly, the
controller subsystem 202 of the aforementioned second visual
stimulation assembly 200b can be provided with control signal
generation regulator circuitry adapted to-detect a switch between
high- and low-states in a second auxiliary sensor signal generated
by the auxiliary sensor subsystem 204b of the second visual
stimulation assembly 200b. Accordingly, the controller subsystem
202 of each particular visual stimulation assembly can be
characterized as an internal control signal generation
regulator.
[0111] Referring to FIG. 17, at time T1, the force applied by a
user to a sensor subsystem of a particular visual stimulation
assembly (e.g., the first or second visual stimulation assembly
200a or 200b) is less than the predetermined threshold (e.g., the
user has completely lifted the sole of the shoe over the walking
surface to complete a step as shown in FIGS. 6C or 7C).
Accordingly, the auxiliary sensor subsystem of the particular
visual stimulation assembly generates an auxiliary sensor signal
indicating a high-state. At time T2, the force applied by a user to
the auxiliary sensor subsystem of the particular visual stimulation
assembly is greater than the predetermined threshold (e.g., the
user has placed the sole of the shoe on the walking surface 308
after completing a step as shown in FIGS. 5B, 6B, or 7B).
Accordingly, the particular auxiliary sensor subsystem of the
particular visual stimulation assembly generates an auxiliary
sensor signal indicating a low-state. As illustrated, the process
of applying pressure less than, and in excess of the predetermined
threshold to generate an auxiliary sensor signal having high- and
low-states, respectively, is repeated in accordance with a user's
ambulatory movement.
[0112] According to one embodiment, the amount of time elapsing
between when the user completes a step (e.g., by contacting the
sole of a shoe with the walking surface 308) and when the user is
in the process of completing a step (e.g., by lifting the sole of
the shoe over the walking surface 308) can be monitored to regulate
the generation of control signals by the controller subsystems. In
one embodiment, regulated generation of control signals can be
accomplished by monitoring the amount of time that elapses between
when an auxiliary sensor signal switches from a high-state to a
low-state to when the auxiliary sensor signal switches from the
low-state back to a high-state.
[0113] For example, at step 1802 of FIG. 18, the controller
subsystem of the aforementioned particular visual stimulation
assembly detects a switch from the high- to low-state of the
particular generated auxiliary sensor signal and, at step 1804,
monitors (e.g., counts) an amount of time, t, that elapses after
the high-state auxiliary sensor signal switches to a low-state.
[0114] If, as a result of the monitoring, it is determined that the
auxiliary sensor signal generated by an auxiliary sensor subsystem
of a particular visual stimulation assembly switches from low-state
to a high-state before a predetermined amount of time, t.sub.1,
(e.g., about 1-3 seconds) has elapsed after the auxiliary sensor
signal previously switched from the high-state to the low-state
(see, for example, .DELTA.T in FIG. 17; step 1806 in FIG. 18), the
user of the ambulatory assistance system is assumed to be walking
in a normative manner (e.g., unimpeded by any perceived obstacle
that would induce a freezing episode). Thus, it is assumed that a
visual stimulus is not needed to assist the user walk and the
controller subsystem of the particular visual stimulation assembly
ceases generating control signals to become deactivated (see step
1808 in FIG. 18).
[0115] If, as a result of the monitoring, it is determined that the
auxiliary sensor signal generated by the particular sensor
subsystem does not switch from the low-state to a high-state after
the predetermined amount of time, t.sub.1, has elapsed after the
auxiliary sensor signal previously switched from the high-state to
the low-state (see, for example, T2+t.sub.1 or T3+t.sub.1 in FIG.
17), the user of the ambulatory assistance system is assumed to
have stopped walking or is slowing down due to some perceived
obstacle that would induce a freezing episode and, therefore,
requires the visual stimulus to assist in walking. Thus, it is
assumed that a visual stimulus is needed to assist the user walk
and the controller subsystem generates a control signal to drive a
stimulus driver to provide a visual stimulus in a visually
engagable region, thereby maintaining an activated state of the
controller subsystem or re-activating controller subsystem if it
has been previously deactivated.
[0116] As discussed above, numerous embodiments have been
exemplarily described as directed to an ambulatory assistance
system including complementary first and second visual stimulation
assemblies 200a and 200b that receive on/off signals generated by
an externally provided control signal generation regulator 1600. In
another embodiment, however, an ambulatory assistance system is
provided wherein on/off signals are transmitted between the
complementary first and second visual stimulation assemblies 200a
and 200b. Due to the substantial amount of overlap between the two
general embodiments, only that which is different from the
embodiments described above will be discussed in detail.
[0117] In an ambulatory assistance system where on/off signals are
transmitted between the complementary first and second visual
stimulation assemblies 200a and 200b, the controller subsystem 202
of the first visual stimulation assembly 200a is provided with
circuitry adapted to drive the stimulus driving subsystem 100 of
the first visual stimulation assembly 200a in accordance with main
sensor signals generated by the main sensor subsystem 204a of
second visual stimulation assembly 200b. Similarly, the controller
subsystem 202 of the second visual stimulation assembly 200b is
provided with circuitry adapted to drive the stimulus driving
subsystem 100 of the second visual stimulation assembly 200b in
accordance with main sensor signals generated by the main sensor
subsystem 204a of first visual stimulation assembly 200a.
[0118] Moreover, control signals output by a given controller
subsystem instruct an associated actuator coupled to a hinge to
move (e.g., rotate) the barrier 102 to the visually disengagable
position when a received sensor signal indicates a low-state and
instruct the associated actuator coupled to the hinge to move
(e.g., rotate) the barrier to the visually engagable position when
a received sensor signal indicates a high-state.
[0119] Further, the communications subsystem 206 of the first
visual stimulation assembly 200a is provided as any suitable type
of transceiver assembly capable of transmitting signals to, and
receiving signals from the second visual stimulation assembly 200b,
in addition to receiving signals from the control signal generation
regulator 1600. Similarly, the communications subsystem 206 of the
second visual stimulation assembly 200b is provided as any suitable
type of transceiver assembly capable of transmitting signals to,
and receiving signals from the second visual stimulation assembly
200b, in addition to receiving signals from the control signal
generation regulator 1600. In another embodiment, the
communications subsystems 206 of the first and second visual
stimulation assemblies 200a and 200b can also be provided as any
suitable type of transmitter capable of transmitting signals to a
complementary visual stimulation assembly. The communications
subsystems 206 of the first and second visual stimulation
assemblies 200a and 200b are adapted to transmit and receive the
signals wirelessly.
[0120] The communications subsystem 206 of the first visual
stimulation assembly 200a is adapted to output the received second
main sensor signal to the controller subsystem 202 of the first
visual stimulation assembly 200a while the communications subsystem
206 of the second visual stimulation assembly 200b is adapted to
output the received first main sensor signal to the controller
subsystem 202 of the second visual stimulation assembly 200b. The
communications subsystem 206 of the first visual stimulation
assembly 200a is adapted to transmit a first main sensor signal to
the second visual stimulation assembly 200b while the
communications subsystem 206 of the second visual stimulation
assembly 200b is adapted to transmit a second main sensor signal to
the first visual stimulation assembly 200a.
[0121] An exemplary operation of the ambulatory assistance system
described above with respect to FIGS. 1A and 1C and 2A-2B will now
be discussed in greater detail with respect to FIGS. 19A and 19B.
Concurrent reference is also made to the flow chart of FIG. 8.
[0122] FIGS. 19A and 19B illustrate an embodiment wherein the
control signal generation regulator 1600 has been manipulated by a
user to generate, for example, an on/off signal causing the
controller subsystems of the first and second visual stimulation
assemblies to output control signals in response to main sensor
signals output by their associated main sensor subsystems.
Accordingly, FIG. 19A 19B illustrate the result where a force
exceeding the predetermined threshold is applied to main sensor
subsystems of both the first and second visual stimulation
assemblies and the first and second barriers 102a and 102b are
located in the aforementioned visually disengagable position
602.
[0123] Specifically, FIG. 19A illustrates a front view of the
ambulatory assistance system while FIG. 19B schematically
illustrate exemplary arrangements of the first and second shoes
110a and 110b when the first and second barriers 102a and 102b are
located in the visually disengagable position 502 shown in FIG.
19A. As shown in FIG. 19B, the user is standing with the first and
second shoes 110a and 110b together while applying a force, in
excess of the predetermined threshold, to the main and auxiliary
sensor subsystems of the first and second visual stimulation
assemblies (e.g., as indicated by the shaded heel 112 and sole 112
of the first and second shoes 110a and 110b).
[0124] Because the user is applying a force exceeding the
predetermined threshold to main sensor subsystems of both the first
and second visual stimulation assemblies in FIGS. 19A and 19B, the
main sensor subsystems of the first and second visual stimulation
assemblies generate first and second main sensor signals,
respectively, both indicating a low-state. Moreover, because the
user is applying a force exceeding the predetermined threshold to
auxiliary sensor subsystems of both the first and second visual
stimulation assemblies in FIG. 19A 19B, the auxiliary sensor
subsystems of the first and second visual stimulation assemblies
generate first and second auxiliary sensor signals, respectively,
both indicating a low-state. As will be discussed in greater detail
below, auxiliary sensor signals indicating a low-state may be used
in automatically regulating an operation of the controller
subsystems in each of the first and second visual stimulation
assemblies.
[0125] In the embodiment generally described with respect to FIGS.
19A and 19B, the first main sensor signal is transmitted from the
main sensor subsystem of the first visual stimulation assembly to
the communications subsystem of the first visual stimulation
assembly. The communications subsystem of the first visual
stimulation assembly then transmits the first main sensor signal to
the communications subsystem of the second visual stimulation
assembly where it is subsequently output to the controller
subsystem of the second visual stimulation assembly (see step 802
in FIG. 8). Upon receipt of the first main sensor signal indicating
the low-state, the controller subsystem of the second visual
stimulation assembly outputs a control signal instructing the
actuator of the second stimulus driver 104b to move (e.g., rotate)
the barrier 102b to the visually disengagable position indicated at
502 (see step 804 in FIG. 8). In response, the actuator of the
second stimulus driver, coupled to a hinge, moves (e.g., rotates)
the barrier 102b to the visually disengagable position 602 (see
step 806 in FIG. 8). A process similar to that described above is
also performed to ultimately move (e.g., rotate) the barrier 102a
of the first visual stimulation assembly in accordance with a
second main sensor signal generated by the main sensor subsystem of
the second visual stimulation assembly.
[0126] An exemplary method of operation of the embodiment described
above with respect to FIGS. 19A and 19B will now be described with
respect to FIGS. 6A-6C and 7A-7C. When the user is applying a force
less than the predetermined threshold to the main sensor subsystem
of the second visual stimulation assembly to the second shoe 110b
(i.e., the trailing shoe), as shown in FIG. 6B, the main sensor
subsystem of the second visual stimulation assembly generates a
second main sensor signal indicating a high-state. When the user is
applying a force less than the predetermined threshold to the
auxiliary sensor subsystem of the second visual stimulation
assembly to the second shoe 110b (i.e., the trailing shoe), as
shown in FIG. 6C, the auxiliary sensor subsystem of the second
visual stimulation assembly generates a second auxiliary sensor
signal indicating a high-state.
[0127] The second main sensor signal is transmitted from the main
sensor subsystem of the second visual stimulation assembly to the
communications subsystem of the second visual stimulation assembly.
The communications subsystem of the second visual stimulation
assembly then transmits the second main sensor signal to the
communications subsystem of the first visual stimulation assembly
where it is subsequently output to the controller subsystem of the
first visual stimulation assembly. Upon receipt of the second main
sensor signal indicating the high-state, the controller subsystem
of the first visual stimulation assembly generates a control signal
adapted to instruct the actuator of the first stimulus driver 104a
to move (e.g., rotate) the barrier 102a to the visually engagable
position 502.
[0128] Upon completion of the step with the second shoe 110b, an
arrangement of the user's shoes 110a and 110b can be similar to
that shown in FIG. 19B or as shown in FIG. 7B (e.g., the first shoe
110a is the trailing shoe and the second shoe 110b is the leading
shoe). Accordingly, a force exceeding the predetermined threshold
is applied to the main sensor subsystem of the second visual
stimulation assembly and a second main sensor signal representing a
low-state is generated, transmitted, and ultimately received by the
controller subsystem of the first visual stimulation assembly. In
response to the second main sensor signal indicating a low-state,
the controller subsystem of the first visual stimulation assembly
generates a control signal adapted to instruct the actuator of the
first stimulus driver 104a to move (e.g., rotate) the first barrier
102a to the visually disengagable position 602 as shown in FIG.
19A. Thus, the first barrier 102a is moved out of the way to
minimize interference with the user's subsequent ambulatory
movement.
[0129] As similarly discussed above, the operational results
exemplarily illustrated in FIGS. 6A-6C and 7A-7C are attained
through reciprocal processes between the first and second visual
stimulation assemblies. Accordingly, the aforementioned process can
be repeated as the user initiates and completes a step with the
first shoe 110a and as the user alternately initiates and completes
successive steps alternating between the first and second shoes
110a and 110b.
[0130] Where the barrier-type visual stimulus 102 is replaced with
the aforementioned light-type stimuli (discussed above with respect
to FIGS. 13 to 15), the principles of the present embodiment act to
turn off the stimulus driver (e.g., any of stimulus drivers 1304 or
1402, or 1504) of a particular visual stimulation assembly when a
user is applying a force in excess of the predetermined threshold
to the main sensor subsystem of a complementary visual stimulation
assembly and act to turn on the stimulus driver (e.g., any of
stimulus drivers 1304 or 1402, or 1504) of the particular visual
stimulation assembly when a user is applying a force less than the
predetermined threshold to the main sensor subsystem of the
complementary visual stimulation assembly.
[0131] It will be appreciated that the aforementioned control
signal generation regulator 1600 may be provided to generate on/off
signals that selectively deactivate and activate (or re-activate) a
controller subsystem 202 with respect to a main sensor subsystem
204a associated with a complementary visual stimulation assembly.
Further, the control signal generation regulator 1600 may further
include one or more switches 1604 adapted to generate and transmit
the aforementioned stimulus deployment signal to one or both
controller subsystems of the first and second visual stimulation
assemblies 200a and 200b.
[0132] In an ambulatory assistance system where on/off signals are
transmitted between the complementary first and second visual
stimulation assemblies 200a and 200b, the on/off signals can be
automatically generated in a manner similar to that discussed above
with respect to FIGS. 17 and 18 to automatically deactivate and
re-activate controller subsystems, thereby automatically regulating
the ability of controller subsystems to generate control signals
based on main sensor signals generated by main sensor subsystems
204a associated with complementary controller subsystems.
[0133] In this case, if, as a result of the aforementioned
monitoring step 1804 (see FIG. 18), it is determined that the
auxiliary sensor signal generated by a sensor subsystem of a
particular visual stimulation assembly switches from a low-state to
a high-state before a predetermined amount of time, ti, (e.g.,
about 1-3 seconds) has elapsed after the auxiliary sensor signal
previously switched from the high-state to the low-state (see, for
example, .DELTA.T in FIG. 17; step 1806 in FIG. 18), the user of
the ambulatory assistance system is assumed to be walking in a
normative manner (e.g., unimpeded by any perceived obstacle that
would induce a freezing episode). Thus, the controller subsystem of
the particular visual stimulation assembly generates an on/off
signal that is transmitted to the controller subsystem of a
complementary visual stimulation assembly, via the communications
subsystems of the two visual stimulation assemblies, to deactivate
the controller subsystem of the complementary visual stimulation
assembly (see step 1808 in FIG. 18). Accordingly, the transmitted
on/off signal instructs the controller subsystem of the
complementary visual stimulation assembly to cease generation of
the control signals with respect to any main sensor signals
generated as a result of walking.
[0134] If, as a result of the aforementioned monitoring, it is
determined that the auxiliary sensor signal generated by the
particular sensor subsystem does not switch from the low-state to a
high-state after the predetermined amount of time, ti, has elapsed
after the auxiliary sensor signal previously switched from the
high-state to the low-state (see, for example, T2+t.sub.1 or
T3+t.sub.1 in FIG. 17), the user of the ambulatory assistance
system is assumed to have stopped walking or is slowing down due to
some perceived obstacle that would induce a freezing episode and,
therefore, requires the visual stimulus to assist in walking. Thus,
the controller subsystem of the particular visual stimulation
assembly generates an on/off signal that is transmitted to the
controller subsystem of the complementary visual stimulation
assembly, via the communications subsystems of the two visual
stimulation assemblies, instructing the controller subsystem of the
complementary visual stimulation assembly to generate a control
signal thereby maintaining an activated state of the controller
subsystem of the complementary visual stimulation assembly or
re-activating controller subsystem of the complementary visual
stimulation assembly if it has been previously deactivated (see
step 1810 in FIG. 18).
[0135] As described above, numerous embodiments of ambulatory
assistance systems employing a barrier-type visual stimulus use an
actuator to move a barrier (e.g., rotatably about a hinge or
linearly into and out of a shoe housing) between visually engagable
and disengagable positions. In another embodiment, however, an
ambulatory assistance system may include one or more visual
stimulation assemblies employing a barrier that can be moved
between the visually engagable and disengagable positions manually
by a user, thereby eliminating the need for an actuator or any of
the aforementioned controller, power, sensor, and communication
subsystems 202, 204, 206, and 208, respectively. In this case, one
or more visual stimulation assemblies (i.e., one or more manual
visual stimulation assemblies) within an ambulatory assistance
system may simply include a barrier (e.g., provided as discussed
above with respect to any of the aforementioned embodiments)
connected to a hinge that is, in turn, integrally formed with a
user's shoe (e.g., as exemplarily shown in any of FIGS. 1A-1D, 2B,
5A-7C, or 9-10B) or integrally formed with an attachment that can
be coupled to the user's shoe or directly to the user's foot (e.g.,
as exemplarily shown FIG. 2B). Moreover, one or more manual visual
stimulation assemblies may be coupled to a respective shoe 110 via
an attachment (e.g., an attachment assembly 2000 as exemplarily
described with respect to FIGS. 20-24). Although FIGS. 20-24
illustrate only one manual visual stimulation assembly, it will be
appreciated that the ambulatory assistance system may comprise a
pair of manual visual stimulation assemblies, one for each of a
user's shoes.
[0136] Referring to FIGS. 20 and 21, a manual visual stimulation
assembly includes a barrier 102 coupled to a hinge assembly 2002.
The hinge assembly 2002, in turn, is coupled to an attachment
assembly 2000 that includes a plate member 2004, an attachment
plate 2006 coupled to a first end of the plate member 2004, and a
first slot 2008 defined within an upper portion of the attachment
plate 2006. As shown in FIG. 21, a second slot 2102 is defined
within a region proximate to a second end of the plate member 2004.
Accordingly, a fastening element 2010 can be inserted through the
first and second slots 2008 and 2102, respectively couple the
attachment assembly 2000 to the to a user's shoe 110 (or to the
user's foot). As shown, the fastening element 2010 can comprise two
straps having ends that can be coupled together via any suitable
mechanism (e.g., Velcro, snaps, magnets, etc.).
[0137] In one embodiment exemplarily illustrated in FIG. 22, a
coupling plate 2202 can be coupled to the second end of the plate
member 2004 and the aforementioned second slot 2102 can be defined
in the coupling plate 2202. In another embodiment, the length of
the plate member 2004 can be adjusted by any known means to
accommodate shoes and feet of varying widths. For example, and with
reference to FIG. 23A, the length of plate member 2004 can be less
than the width of a user's foot such that the fastening element
2010 extends below the user's foot. Moreover, and with reference to
FIG. 23B, the plate member 2004 can be completely removed from the
attachement assembly 2000 in which case the aforementioned second
slot 2102 is defined in the attachment plate 2006 and the fastening
element 2010 extends completely below the user's foot and is fixed
within the second slot 2102.
[0138] According to numerous embodiments, the plate member 2004,
the attachment plate 2006, and/or the coupling plate 2202 of the
attachment assembly 2000 can be formed from any material or
combination of materials sufficient to provide a suitably pliable
structure that can conform, to any desired degree, surface of the
structure to which it is attached. For example, when the attachment
assembly 2000 is adapted to be coupled to a user's shoe, the plate
member 2004, the attachment plate 2006, and/or the coupling plate
2202 can be formed of a metal material having limited pliability.
When the attachment assembly 2000 is adapted to be coupled directly
to the user's shoe, the plate member 2004, the attachment plate
2006, and/or the coupling plate 2202 can be formed of a material
(e.g., plastic, rubber, leather, etc.) having more than a limited
amount of pliability.
[0139] The hinge assembly 2002 can be integrally formed with the
attachment plate 2006 or can be fastened to the attachment plate
2006 via any suitable means (e.g., screws, pegs, adhesive, clips,
Velcro, magnets, or the like, or combinations thereof). As shown in
FIGS. 20 and 21, the hinge assembly 2002 includes a support portion
2012, a standoff element 2014 coupled to the support portion 2012,
a hinge 2016 coupled to a distal end of the standoff element 2014,
and a barrier support member 2018 coupled to the hinge 2016. The
barrier 102 can be integrally formed with the barrier support
member 2018 of can be fastened to the barrier support member 2018
via any suitable means (e.g., screws, pegs, adhesive, clips,
Velcro, magnets, or the like, or combinations thereof).
Accordingly, the barrier 102 is fixed to the attachment assembly
2000 via the barrier support member 2018 of hinge assembly
2002.
[0140] As shown, the hinge assembly 2002 is oriented so as to allow
the barrier 102 to be rotated about a substantially horizontal
axis. It will be appreciated, however, that the hinge assembly 2002
can be coupled to the attachment plate 2006 in substantially any
manner enabling the barrier 102 to be rotated about a substantially
vertical axis. In one embodiment, the hinge 2016 is provided as a
detented hinge enabling the barrier 102 to be held in predetermined
positions (i.e., the aforementioned visually disengagable and
visually engagable positions) until the user applies a threshold
amount of force to move the barrier 102.
[0141] For example, and with reference to FIG. 24, a detented hinge
2016 can include a first casing 2402 connected to the standoff
element 2014, a second casing 2404 connected to the barrier support
member 2018, and a pin 2406 connected to the second casing 2404.
First and second notches 2408 and 2410, respectively, are defined
within in interior region of the first casing 2402 and a protrusion
2412 is formed on an exterior surface of the pin 2406. As shown,
the first and second casings 2402 and 2404 define a channel within
which the pin 2406 rotates and the first and second notches 2408
and 2410 are configured so as to at least partially receive the
protrusion 2412. Although not shown, the detented hinge 2016
further includes a spring washer disposed within the channel
between the pin 2406 and the first and second casings 2402 and
2404. In one embodiment, the spring washer is adapted to bias the
protrusion 2412 into a proximately arranged one of the first and
second notches 2408 and 2410. In another embodiment, the
arrangement of the first and second notches 2408 and 2410 within
the first casing 2402 and the location of the protrusion 2412 on
the pin 2406 can be selected such that the protrusion 2406 is
biased by the spring washer into the second notch 2410 when the
barrier 102 is arranged in the visually engagable position (as
shown in FIG. 24) and into the first notch 2408 when the barrier
102 is arranged in the visually disengagable position. Accordingly,
a user can selectively move the barrier exemplarily illustrated in
FIGS. 20 and 21 between the visually engagable and disengagable
positions by applying sufficient amount of force to dislodge the
protrusion 2406 from one of the first and second notches 2408 and
2410.
[0142] As described above, numerous embodiments of ambulatory
assistance systems include a barrier adapted to be moved (e.g.,
either by some actuating mechanism or by the user) between visually
engagable and disengagable positions. In another embodiment,
however, an ambulatory assistance system may include one or more
visual stimulation assemblies provided with a fixed barrier (i.e.,
a barrier that is permanently deployed in a visually engagable
position). In this case, an ambulatory assistance system may
include one or more visual stimulation assemblies (i.e., one or
more fixed visual stimulation assemblies) including a barrier 102
(e.g., provided as discussed above with respect to any of the
aforementioned embodiments) that is integrally formed with or
otherwise coupled to a respective one of a user's shoes (e.g., shoe
2502), as exemplarily shown in FIG. 25 or that is either integrally
formed with or otherwise coupled to an attachment (e.g., as
exemplarily shown in FIGS. 26, 27, 29A-B, 30, and 35) that attaches
or is otherwise coupled to a user's shoe or foot. Although FIGS. 25
and 26 illustrate only one fixed visual stimulation assembly, it
will be appreciated that the ambulatory assistance system may
comprise a pair of such fixed visual stimulation assemblies, one
for each of a user's shoes or feet.
[0143] According to numerous general embodiments, the fixed
barriers 102 can be provided as an elongated member having a
longitudinal length, l, sufficient to place at least a portion of
the fixed barrier 102 within the visually engagable region while
minimizing the degree to which the barrier 102 interferes with a
user's normal ambulatory movement. In one embodiment, any of the
aforementioned fixed barriers can be provided as an elongated
member having a longitudinal length, l, between about 11/2-6 inches
and a maximum transverse dimension of about 1/4-2 inches. In
another embodiment, the longitudinal length, l, is between about 24
inches. In another embodiment, the longitudinal length, l, is about
3 inches. To further minimize the degree to which a fixed barrier
102 might interfere with a user's normal ambulatory movement, the
fixed barrier 102 can be provided as a flexible, resilient,
self-supporting structure (e.g., as shown by 102' in FIG. 25)
formed using one or more components.
[0144] In one embodiment, each fixed barrier may include a hard
material (e.g., a metal such as aluminum, polymers, or the like, or
combinations thereof), a soft material (e.g., urethane, rubber
foam, or the like, or combinations thereof), or any combination
thereof. In a specific embodiment, a fixed barrier is provided as a
coil spring coated with a membrane formed of a flexible, elastic
material so as to provide a substantially contiguous exterior
surface. In other embodiments, the fixed barriers can be brightly
colored, reflective, have a surface formed of photo- or
electro-luminescent material, include light emitting devices (e.g.,
light emitting diodes, etc.), light transmitting structures (e.g.,
optical fibers, etc.), or the like, or combinations thereof, to
enhance the degree to which a user is visually stimulated by the
fixed barrier. In another embodiment, at least a portion of the
fixed barrier that is observable by the user within the visually
engagable region is configured as described above to enhance the
degree to which a user is visually stimulated.
[0145] In the embodiment exemplarily shown in FIG. 26, an
attachment 2602 can be coupled to the user's shoe or directly to
the user's foot in a manner similar to that described above with
respect to the attachment shown in FIGS. 2B and 2C.
[0146] In the embodiment exemplarily shown in FIG. 27, an
attachment 2700 having an adjustable width can be coupled (e.g.,
clipped) onto the bottom of a user's shoe 110. As shown, a fixed
barrier 102 extends from the attachment 2700 into the visually
engagable region of the user. Although FIG. 27 illustrates only one
attachment, it will be appreciated that the ambulatory assistance
system may comprise a pair of such attachments, one for each of a
user's shoes. A more detailed description of the attachment 2700
will now be given with reference to FIG. 28.
[0147] Referring to FIG. 28, the attachment 2700 exemplarily shown
in FIG. 27 includes first and second clip members 2802a and 2802b,
respectively, and a securing mechanism 2804. The first clip member
2802a includes a first plate member 2806a and a first coupling
portion 2808a disposed at a first terminal of the first plate
member 2806a. Similarly, the second clip member 2802b includes a
second plate member 2806b and a second coupling portion 2808b
disposed at a first terminal end of the second plate member 2806b.
In one embodiment, the first and second coupling portion 2808a and
2808b are provided as brackets extending over the first and second
plate members 2806a and 2806b and adapted to contact opposite sides
of a user's shoe. In the illustrated embodiment, the securing
mechanism 2804 includes a sleeve 2810 disposed at a second terminal
end of the second plate member 2806b and a screw-knob 2812 adapted
to engage the sleeve 2810 via an opening 2814. In one embodiment,
the sleeve 2810 defines a port 2816 disposed below a lower surface
of the second plate member 2806b and adapted to receive a second
terminal end of the first plate member 2806a. In the illustrated
embodiment, the barrier 102 is coupled to an exterior surface of
the first clip member 2802a such that it will extend into a
visually engagable region of the user when the attachment 2700 is
coupled to the user's shoe. It will be appreciated, however, that
the barrier 102 may alternatively be coupled to a portion of the
second clip member 2802b such that it will similarly extend into a
visually engagable region of the user.
[0148] To couple the clip-on attachment 2700, the first plate
member 2806a is inserted into the port 2816 such that the upper
surface of the first plate member 2806a is overlapped by the lower
surface of the second plate member 2806b. As the amount of overlap
between the first and second plate members 2806a and 2806b
increases (e.g., as the user continues to feed the first plate
member 2806a into the port 2816), the first and second coupling
portion 2808a and 2808b engage opposing sides of a user's shoe
(e.g., the first and second coupling portion 2808a and 2808b act to
squeeze the user's shoe) to provide a stable coupling of the
attachment 2700 to the user's shoe. Once the first and second
coupling portion 2808a and 2808b are sufficiently engaged with the
user's shoe, the user can manipulate the securing mechanism 2804 to
maintain the first and second coupling means' 2808a and 2808b
engagement with opposing sides of the user's shoe. For example, the
user can thread the screw-knob 2812 through the opening 2814 (e.g.,
in a counter-clockwise direction) such that the screw-knob 2812
pushes the first plate member 2806a against an internal surface of
the sleeve 2810 with sufficient force to substantially prevent
movement of the first plate member 2806a into, or out of the port
2816. To release the attachment 2700 from the user's shoe, the user
may simply thread the screw-knob 2812 through the opening 2814
(e.g., in a clockwise direction) such that the amount of force
applied by the screw-knob 2812 against the first plate member 2806a
is reduced or eliminated, thereby allowing the first plate member
2806a to move out of the port 2816.
[0149] The attachment 2700 described above with respect to FIGS. 27
and 28 is but one exemplary clip-on attachment that can be used to
couple a barrier 102 to a user's shoe. It will be appreciated that
the barrier 102 can be attached to any portion of a user's shoe via
any suitable clip-on attachment.
[0150] In the embodiment exemplarily shown in FIGS. 29A and 29B, a
fixed visual stimulation assembly can be coupled to an attachment
assembly such as that described above with respect to FIGS. 20-23B
but not including the aforementioned hinge assembly 2002.
Accordingly, the fixed barrier 102 of such a fixed visual
stimulation assembly does not rotate between the aforementioned
visually engagable and disengagable positions. In accordance with
numerous embodiments, the fixed barrier 102 can be integrally
formed with the attachment plate 2006 or fastened directly to the
attachment plate 2006 via any suitable means (e.g., screws, pegs,
adhesive, clips, Velcro, magnets, or the like, or combinations
thereof). Thus, when the fixed visual stimulation assembly is
coupled to an article of footwear (e.g., a shoe 110 as shown in
FIG. 29A) or directly to the user's foot (e.g., as shown in FIG.
29B), the fixed barrier 102 is permanently deployed in a visually
engagable region of the user. Although FIGS. 29A and 29B illustrate
only one fixed visual stimulation assembly, it will be appreciated
that the ambulatory assistance system may comprise a pair of such
fixed visual stimulation assemblies, one for each of a user's shoes
or feet.
[0151] In the embodiment exemplarily shown in FIG. 30, the fixed
barrier 102 is coupled to an attachment (e.g., attachment body
3000) that is, in turn, integrally formed with, or otherwise
coupled to an article of footwear adapted to be worn by a user
(e.g., a shoe 110) via any suitable means (e.g., screws, pegs,
adhesive, magnets, or the like, or combinations thereof). When the
attachment body 3000 is coupled to the article of footwear, the
fixed barrier 102 extends from the attachment body 3000 into the
visually engagable region of the user. It will be appreciated that
the attachment body 3000 may be fabricated by any suitable means
known to one of ordinary skill in the art. In one embodiment, the
attachment body 3000 and the fixed barrier 102 are integrally
formed. In other embodiments, the attachment body 3000 and fixed
barrier 102 are formed as separate components coupled together.
Although FIG. 30 illustrates only one fixed visual stimulation
assembly, it will be appreciated that the ambulatory assistance
system may comprise a pair of such fixed visual stimulation
assemblies, one for each of a user's shoes. A more detailed
description of the manner in which the fixed barrier 102 can be
coupled with the attachment body 3000 will now be given with
reference to FIGS. 31-34.
[0152] In one embodiment, and with reference to FIG. 31, a recess
3102 is defined within the attachment body 3000 and is configured
to receive a predetermined portion of the fixed barrier 102.
Accordingly, the recess 3102 intersects an outer surface 3104 of
the attachment body 3000, has cross-sectional dimensions defined by
one or more sidewalls 3106, and extends into the interior of the
attachment body 3000 to a predetermined depth as defined by a rear
wall 3108.
[0153] As illustrated, cross-sectional dimensions of the recess
3102 correspond to exterior dimensions of the fixed barrier 102.
Accordingly, when the fixed barrier 102 is satisfactorily inserted
into the recess 3102 (e.g., when a terminal end 3110 of the fixed
barrier 102 contacts the rear wall 3108), the sidewall(s) 3106 of
the recess 3102 frictionally engage the exterior surface(s) of the
fixed barrier 102 and act to immovably retain the fixed barrier 102
within recess 3102. Retained within the recess 3102, the fixed
barrier 102 is adapted to extend into the visually engagable region
of the user when the article of footwear, to which the attachment
body 3000 is coupled, is worn by the user. Once inserted, the
amount of force necessary to remove the fixed barrier 102 from the
recess 3102 is typically greater than forces generated during the
user's normal ambulatory movement, thereby ensuring that the fixed
barrier 102 will not inadvertently become dislodged from the recess
3102 as the user is walking. In one embodiment, however, if a force
exceeding a pull-out threshold force is applied between the barrier
102 and the support attachment body 3000 (e.g., as when a user's
left foot steps on a barrier 102 that is coupled to an article of
footwear worn on the user's right foot), then the barrier 102 will
become dislodged from the attachment body 3000, thereby minimizing
the possibility of the user tripping over the barrier 102 as he or
she is walking or otherwise engaging in normal ambulatory
movement.
[0154] In another embodiment, and with reference to FIG. 32, a
recess 3202 is defined within the fixed barrier 102 and is
configured to receive a peg 3204 of the attachment body 3000.
Similar to the recess described above with respect to FIG. 31, the
recess 3202 intersects an outer surface 3206 at the terminal end
3110 of the fixed barrier 102, has cross-sectional dimensions
defined by one or more sidewalls 3208, and extends into the
interior of the fixed barrier 102 to a predetermined depth as
defined by a rear wall 3210.
[0155] As illustrated, the peg 3204 protrudes from the outer
surface 3104 of the attachment body 3000 to a distance
corresponding to the depth of the recess 3202 and has exterior
cross-sectional dimensions that correspond to the sidewall(s) 3208
of the recess 3202. Accordingly, when the peg 3204 is
satisfactorily inserted into the recess 3202 (e.g., when a terminal
end 3212 of the peg 3204 contacts the rear wall 3210), the
sidewall(s) 3208 of the recess 3202 frictionally engage the
exterior surface(s) of the peg 3204 and act to retain the peg 3204
within the recess 3202, as exemplarily discussed above with respect
to FIG. 31. Consequently, the fixed barrier 102 may extend into the
visually engagable region of the user when the article of footwear,
to which the attachment body 3000 is coupled, is worn by the
user.
[0156] In another embodiment, and with reference to FIG. 33, a
first recess 3302 is defined within the attachment body 3000 and is
configured to receive a predetermined portion of a dowel 3304.
Moreover, a second recess 3306 is defined within the fixed barrier
102 and is configured to receive a predetermined portion of the
dowel 3304. Accordingly, the first recess 3302 intersects the outer
surface 3104 of the attachment body 3000, has cross-sectional
dimensions defined by one or more sidewalls 3308, and extends into
the interior of the attachment body 3000 to a predetermined depth
as defined by a rear wall 3310. Moreover, the second recess 3306
intersects the outer surface 3206 at the terminal end 3110 of the
fixed barrier 102, has cross-sectional dimensions defined by one or
more sidewalls 3312, and extends into the interior of the fixed
barrier 102 to a predetermined depth as defined by a rear wall
3314. Lastly, the dowel includes first and second terminal ends
3316 and 3318, respectively.
[0157] As illustrated, the length of the dowel 3304 between the
first and second terminal ends 3316 and 3318, respectively,
corresponds to the combined depth of the first and second recesses
3302 and 3306. Moreover, the dowel 3304 has exterior
cross-sectional dimensions that correspond to the sidewall(s) of
both the first and second recesses 3302 and 3306. Accordingly, when
the dowel 3304 is satisfactorily inserted into the first and second
recesses 3302 and (e.g., when the first terminal end 3316 contacts
the rear wall 3310 of the first recess 3302 and when the second
terminal end 3318 contacts the rear wall 3314 of the second recess
3306), the sidewall(s) of both the first and second recesses 3302
and 3306 frictionally engage the exterior surface(s) of the dowel
3304 and act to retain the dowel 3304 within first and second
recesses 3302 and 3306, as exemplarily discussed above with respect
to FIG. 31. Consequently, the fixed barrier 102 may extend into the
visually engagable region of the user when the article of footwear,
to which the attachment body 3000 is coupled, is worn by the
user.
[0158] In another embodiment, and with reference to FIG. 34, a
first recess 3402 is defined within the attachment body 3000 and is
configured to receive a predetermined portion of the fixed barrier
102. Accordingly, the first recess 3402 intersects the outer
surface 3104 of the attachment body 3000, has cross-sectional
dimensions defined by one or more sidewalls 3404, extends into the
interior of the attachment body 3000 to a predetermined depth as
defined by a rear wall 3406, and includes a recessed peg 3408
disposed therein. Moreover, a second recess 3410 is defined within
the fixed barrier 102 and is configured to receive a predetermined
portion of the recessed peg 3408. Accordingly, the second recess
3410 intersects the outer surface 3206 at the terminal end 3110 of
the fixed barrier 102, has cross-sectional dimensions defined by
one or more sidewalls 3412, and extends into the interior of the
fixed barrier 102 to a predetermined depth as defined by a rear
wall 3414.
[0159] As illustrated, the recessed peg 3408 protrudes from the
rear wall 3406 of the first recess 3402 to a distance corresponding
to the depth of the second recess 3410 and has exterior
cross-sectional dimensions that correspond to the sidewall(s) 3412
of the second recess 3410. Accordingly, when the fixed barrier 102
is satisfactorily inserted into the first recess 3402 (e.g., when
the terminal end 3110 of the fixed barrier 102 contacts the rear
wall 3406), the sidewall(s) 3404 of the first recess 3402
frictionally engage the exterior surface(s) of the fixed barrier
102. Moreover, upon satisfactorily inserting the fixed barrier 102
into the first recess 3402, a terminal end 3416 of the recessed peg
3408 contacts the rear wall 3414 of the second recess 3410 and the
sidewall(s) 3412 of the second recess 3410 frictionally engage the
exterior surface(s) of the recessed peg 3408. As a result of the
combined frictional engagement between the sidewall(s) 3404 of the
first recess 3402 and the exterior surface(s) of the fixed barrier
102 and between the sidewall(s) 3412 of the second recess 3410 and
the exterior surface(s) of the recessed peg 3408, the fixed barrier
102 is retained within the first recess 3402, as exemplarily
discussed above with respect to FIG. 31. Consequently, the fixed
barrier 102 may extend into the visually engagable region of the
user when the article of footwear, to which the attachment body
3000 is coupled, is worn by the user.
[0160] As described above with respect to FIGS. 31-34, the barrier
102 is coupled to the attachment body 3000 as a result of a "tight
fit" or frictional engagement between the barrier 102 and one or
more other structures associated with the attachment body 3000. In
one embodiment, additional means may be provided to enhance or
replace the frictional engagement between the barrier 102 and the
attachment body 3000. For example, the recess 3102 (as described
with respect to FIG. 31) may be provided with threaded sidewalls or
other structure adapted to mechanically interact with the exterior
surface of the barrier 102. In another example, coupling between
the barrier 102 and the attachment body 3000 may be achieved or
enhanced by gluing the above-described components together.
[0161] Moreover, and as described above with respect to FIGS.
30-34, the fixed visual stimulation assembly comprising the
attachment body 3000 is disposed below the sole of a user's shoe.
It will be appreciated, however, that such a fixed visual
stimulation assembly may be coupled to substantially any portion of
the user's shoe and in substantially any manner. It will further be
appreciated that the attachment body 3000 may be integrally formed
with, or otherwise coupled to the attachment plate 2006 of the
fixed visual stimulation assembly shown in FIGS. 29A and 29B or
with the first or second clip members 2802a and 2802b of the
attachment 2700 to facilitate attachment of the barrier 102 to
these structures.
[0162] In the embodiment exemplarily shown in FIG. 35, the fixed
barrier 102 is coupled to an attachment (e.g., attachment body
3500) that is, in turn, integrally formed with, or otherwise
attached to an article of footwear adapted to be worn by a user
(e.g., a shoe 110) via any suitable means (e.g., screws, pegs,
adhesive, magnets, or the like, or combinations thereof). When the
attachment body 3500 is properly coupled to the article of footwear
(e.g., via the heel 114 of the user's shoe 110 as illustrated or
via any other portion of the user's shoe), the fixed barrier 102
extends from the attachment body 3500 into the visually engagable
region of the user. It will be appreciated that the attachment body
3500 may be fabricated by any suitable means known to one of
ordinary skill in the art. Although FIG. 35 illustrates only one
fixed visual stimulation assembly, it will be appreciated that the
ambulatory assistance system may comprise a pair of such fixed
visual stimulation assemblies, one for each of a user's shoes.
[0163] In one embodiment, the attachment body 3500 and fixed
barrier 102 are formed as separate components can be coupled
together. A more detailed description of the manner in which the
fixed barrier 102 can be coupled with the attachment body 3500 will
now be given with reference to FIGS. 36 and 37.
[0164] Referring to FIG. 36, the fixed barrier 102 includes a
membrane 3602, a coil spring 3604 (as seen in cut-away section of
membrane 3602), and an attachment pin 3606 coupled to the coil
spring 3604 via barrier connection member 3608. The attachment body
3500 includes a base 3610, a sleeve 3612, and a pin-receiving
opening 3614 defined within the sleeve 3612.
[0165] In one embodiment, the membrane 3602 is formed of a
flexible, elastic material (e.g., urethane rubber, or the like).
Accordingly, the membrane 3602 provides a contiguous exterior
surface to the barrier 102, allows the coil spring 3604 to flex,
and prevents objects (e.g., carpet, grass, dirt, another barrier,
etc.) from becoming entangled with the coil spring 3604. In another
embodiment, and as more clearly shown in FIG. 37, the coil spring
3604, the attachment pin 3606, and the barrier connection member
3608 are integrally formed. As shown, the connection member 3608
couples a top portion of the attachment pin 3606 to the coil spring
3604 such that a bottom portion of the attachment pin 3606 extends
freely from the coil spring 3604.
[0166] Referring back to FIG. 36, the fixed barrier 102 may be
coupled to the attachment body 3500 by inserting the bottom portion
of the attachment pin 3606 through a first end (e.g., an upper end)
of the pin-receiving opening 3614 until the connection member 3608
contacts a first surface (e.g., an upper surface) of the sleeve
3612. In embodiments where the attachment body 3500 is oriented
such that the sleeve 3612 and pin-receiving opening 3614 are
vertically oriented, the attachment pin 3606 is retained within the
pin-receiving opening 3614 simply by gravity. In other embodiments
where the the sleeve 3612 and pin-receiving opening 3614 are
oriented non-vertically (e.g., horizontally), the barrier 102 is
coupled to the attachment body 3500 arising from a "tight fit" or
frictional engagement between the attachment pin 3606 and sidewalls
defining the cross-sectional dimensions of the pin-receiving
opening 3614. In another embodiment, additional means may be
provided to enhance the degree to which the attachment pin 3606 is
retained within the pin-receiving opening 3614. For example, the
attachment pin 3606 may be glued in place within the pin-receiving
opening 3614.
[0167] Although FIGS. 25-30 and 35 illustrate only one fixed visual
stimulation assembly, it will be appreciated that an ambulatory
assistance system may be provided with a pair of fixed visual
stimulation assemblies, one for each of a user's feet. Moreover, it
will be appreciated that fixed visual stimulation assemblies
described above with respect to any of FIGS. 27-37 can be
integrally formed with any portion of a user's shoe or attachment
or can be otherwise coupled to any portion of a user's shoe or foot
and include barriers configured so as to extend from substantially
any direction into the aforementioned visually engagable
region.
[0168] To minimize the possibility of a user tripping over any of
the barriers 102 of the aforementioned fixed visual stimulation
assemblies shown in FIGS. 25-37, a magnetic coupling system may be
provided to magnetically couple a barrier 102 to a support
component (e.g., an article of footwear as shown in FIG. 25, an
attachment as shown in any of FIGS. 26-28, an attachment plate as
shown in FIGS. 29A or 29B, or an attachment body as shown in any of
FIGS. 30-34). Accordingly, the magnetic coupling system may be
adapted to exert a magnetic coupling force between the barrier 102
and the support component. If a force exceeding the magnetic
coupling force is applied between the barrier 102 and the support
component (e.g., as when a user's left foot steps on a barrier 102
that is coupled to an article of footwear worn on the user's right
foot), then the barrier 102 detaches from the support component,
thereby minimizing the possibility of the user tripping over the
barrier as he or she is walking or otherwise engaging in normal
ambulatory movement.
[0169] Referring to FIG. 38, an exemplary magnetic coupling system
3800 includes a first magnetic coupling component 3802 provided at
a terminal end of the barrier 102 and a second magnetic coupling
component 3804 provided at a location of the support component
where the barrier 102 is to be attached (e.g., at the exterior
surface of the first clip member 2802a). In one embodiment, the
first magnetic coupling component 3802 is provided as a magnet and
the second magnetic coupling component 3804 is provided as a
magnetizable structure (i.e., a structure capable of being
attracted by a force exerted by the magnet of the first magnetic
coupling component 3802. In another embodiment, the second magnetic
coupling component 3804 is provided as a magnet and the first
magnetic coupling component 3802 is provided as a magnetizable
structure (i.e., a structure capable of being attracted by a force
exerted by the magnet of the second magnetic coupling component
3804. In another embodiment, the first and second magnetic coupling
components 3802 and 3804 are provided as magnets having opposite
polarities so as to attract each other.
[0170] While FIG. 38 illustrates a magnetic coupling system
exemplarily implemented in conjunction with the fixed visual
stimulation assembly shown in FIGS. 27 and 28, it will be
appreciated that the magnetic coupling system 3800 may be similarly
implemented in any other embodiment described above. For example,
the magnetic coupling system 3800 may be incorporated within the
embodiment described above with respect to FIG. 31, wherein the
first magnetic coupling component 3802 is comprised as part of the
terminal end 3110 of the barrier 102 and the second magnetic
coupling component 3804 is comprised as part of the rear wall 3108.
In another example, the magnetic coupling system 3800 may be
incorporated within the embodiment described above with respect to
FIG. 32, wherein the first magnetic coupling component 3802 is
comprised as part of the sidewall(s) 3208 and/or rear wall 3210 of
the barrier 102 and the second magnetic coupling component 3804 is
comprised as part of the outer surface 3104 and/or peg 3204 of the
attachment body 3000. In another example, the magnetic coupling
system 3800 may be incorporated within the embodiment described
above with respect to FIG. 33, wherein the first magnetic coupling
component 3802 is comprised as part of the sidewall(s) 3312 and/or
rear wall 3314 of the barrier 102 and the second magnetic coupling
component 3804 is comprised as part of the dowel 3318. In another
example, the magnetic coupling system 3800 may be incorporated
within the embodiment described above with respect to FIG. 33,
wherein the first magnetic coupling component 3802 is comprised as
part of the sidewall(s) 3308 and/or rear wall 3310 of the
attachment body 3000 and the second magnetic coupling component
3804 is comprised as part of the dowel 3318. In another example, a
first magnetic coupling system 3800 may be comprised within the
barrier 102 and dowel 3304 as discussed above and a second magnetic
coupling system 3800 may be comprised within attachment body 3000
and dowel 3304 as discussed above. In another example, the magnetic
coupling system 3800 may be incorporated within the embodiment
described above with respect to FIG. 34, wherein the first magnetic
coupling component 3802 is comprised as part of the sidewall(s)
3412 and/or rear wall 3414 of the barrier 102 and the second
magnetic coupling component 3804 is comprised as part of the
sidewall(s) 3404, rear wall 3406, and/or recessed peg 3408 of the
attachment body 3000. As will be apparent, provision of a magnetic
coupling system 3800 within embodiments exemplarily illustrated in
FIGS. 31-34 allow for a reduced frictional engagement between the
various structures associated with the attachment body 3000 and the
barrier 102. As a result, the barrier 102 can be more easily
coupled with the attachment body 3000 with the magnetic coupling
system than without. Moreover, the magnetic coupling force exerted
between the first and second magnetic components 3802 and 3804 may
be less than the pull-out threshold force. As a result, the barrier
102 can be more easily detached from the attachment body 3000 with
the magnetic coupling system than without. It will be appreciated
that any of the aforementioned visual stimulation assemblies
described above may be provided with the aforementioned magnetic
coupling system or any other system (e.g., electrical, mechanical,
pneumatic, hydraulic, etc.) capable of detachably coupling the
barrier to any desired support component (e.g., a hinge, a shoe, an
attachment plate, a barrier support member, etc.).
[0171] In one embodiment exemplarily shown in FIG. 43, a visual
stimulation assembly includes a fixed barrier 102 magnetically
coupled to a magnetic attachment body 4300 that is, in turn,
integrally formed with, or otherwise coupled to an article of
footwear adapted to be worn by a user (e.g., a shoe 110 that does
or does not have a raised heel area) via any suitable means (e.g.,
screws, pegs, adhesive, magnets, or the like, or combinations
thereof).
[0172] The fixed barrier 102 can be provided as described above
with respect to FIG. 36, but include a coupling plate 4302 coupled
to the barrier 102 via the barrier connection member 3608. The
coupling plate 4302 is provided as, or is otherwise formed with, a
magnetic coupling component such as the aforementioned first
magnetic coupling component 3802. Moreover, the coupling plate 4302
includes a first mating surface 4304 that is substantially
conformal to a second mating surface 4306 of the magnetic
attachment body 4300.
[0173] The magnetic attachment body 4300 is provided as, or is
otherwise formed with, a magnetic coupling component such as the
aforementioned second magnetic coupling component 3804. In the
embodiment shown in FIG. 43, the second mating surface 4306 of the
magnetic attachment body 4300 is substantially planar to maximize a
magnetic coupling between the second mating surface 4306 and the
first mating surface 4304 of the coupling plate 4302.
[0174] When the magnetic attachment body 4300 is coupled to the
article of footwear, and when the first and second mating surfaces
4304 and 4306 are magnetically coupled to each other, the fixed
barrier 102 extends from the magnetic attachment body 4300 and into
the visually engagable region of the user. As a result, the barrier
102 can become easily detached from the magnetic attachment body
4300 in the event that a force exceeding the magnetic coupling
force of the magnetic coupling system is applied between the
barrier 102 and the magnetic attachment body 4300 (e.g., as when a
user's left foot steps on a barrier 102 that is coupled to an
article of footwear worn on the user's right foot). Although FIG.
43 illustrates only one visual stimulation assembly, it will be
appreciated that the ambulatory assistance system may comprise a
pair of such visual stimulation assemblies, one for each of a
user's shoes.
[0175] In another embodiment exemplarily discussed with respect to
FIG. 44, a visual stimulation assembly includes a fixed barrier 102
magnetically coupled to a magnetic attachment body 4400 that is, in
turn, integrally formed with, or otherwise coupled to an article of
footwear adapted to be worn by a user (e.g., a shoe 110 that does
or does not have a raised heel area) via any suitable means (e.g.,
screws, pegs, adhesive, magnets, or the like, or combinations
thereof).
[0176] The magnetic attachment body 4400 can be provided as
described above with respect to FIG. 43 but further include a
securing structure adapted to restrict the ability of the coupling
plate 4402 to move with respect to the second mating surface 4306
when a force (e.g., a shear force) exceeding the aforementioned
magnetic coupling force is applied between the barrier 102 and the
magnetic attachment body 4400. As exemplarily shown in FIG. 44, the
securing structure includes a pair of ribs 4404 having sidewalls
that define a slot 4406 over the second mating surface 4306. As
illustrated, the slot 4406 can be tapered.
[0177] The fixed barrier 102 can be provided as described above
with respect to FIG. 43 but includes a coupling plate 4402 that
includes one or more side surfaces 4408 that conform to the
sidewalls of the slot 4406. Accordingly, the barrier 102 can be
coupled to the magnetic attachment body 4400 by inserting the
coupling plate 4402 into the slot 4406. Upon insertion, the one or
more side surfaces 4408 of the coupling plate 4402 engage the
sidewalls of the pair of ribs 4404 such that the coupling plate
4402 can only move along the length of slot 4406. When the magnetic
attachment body 4400 is coupled to the article of footwear, and
when the first and second mating surfaces 4304 and 4306 are
magnetically coupled to each other, the fixed barrier 102 extends
from the magnetic attachment body 4400 and into the visually
engagable region of the user. As a result, the barrier 102 can
become easily detached from the magnetic attachment body 4400
(e.g., by sliding out of the slot 4406) in the event that a force
exceeding the magnetic coupling force of the magnetic coupling
system is applied between the barrier 102 and the magnetic
attachment body 4500 (e.g., as when a user's left foot steps on a
barrier 102 that is coupled to an article of footwear worn on the
user's right foot). Moreover, because the slot 4406 can be tapered,
a reliable magnetic coupling between the first and second first
mating surfaces 4304 and 4306 can be ensured.
[0178] In another embodiment, the visual stimulation assembly shown
in FIG. 44 can be provided without the aforementioned magnetic
coupling system. In such an embodiment, the dimensional tolerances
between the sidewalls of the slot 4406 and the side surfaces 4408
of the coupling plate 4402 should be sufficient to prevent the
barrier 102 from detaching from the body 4400 during normal
ambulatory movement. Although FIG. 44 illustrates only one visual
stimulation assembly, it will be appreciated that the ambulatory
assistance system may comprise a pair of such visual stimulation
assemblies, one for each of a user's shoes.
[0179] In another embodiment exemplarily discussed with respect to
FIG. 45, a visual stimulation assembly includes a fixed barrier 102
magnetically coupled to a magnetic attachment body 4500 that is, in
turn, integrally formed with, or otherwise coupled to an article of
footwear adapted to be worn by a user (e.g., a shoe 110 that does
or does not have a raised heel area) via any suitable means (e.g.,
screws, pegs, adhesive, magnets, or the like, or combinations
thereof).
[0180] The magnetic attachment body 4500 can be provided as
described above with respect to FIG. 43 but further include a
securing structure adapted to restrict the ability of the coupling
plate 4502 to move with respect to the second mating surface 4306
when a force (e.g., a shear force) exceeding the aforementioned
magnetic coupling force is applied between the barrier 102 and the
magnetic attachment body 4400. As exemplarily shown in FIG. 45, the
securing structure includes a rectangular rib 4504 that defines a
cavity 4506 over the second mating surface 4306.
[0181] The fixed barrier 102 can be provided as described above
with respect to FIG. 43 except that the coupling plate 4502
includes one or more side surfaces 4508 that conforms to the
sidewalls of the cavity 4506. Accordingly, the barrier 102 can be
coupled to the magnetic attachment body 4500 by inserting the
coupling plate 4402 into the cavity. Upon insertion, the one or
more side surfaces 4508 of the coupling plate 4502 engage internal
sidewall surfaces of the rib 4504 such that the coupling plate 4502
is substantially restricted from moving along the second mating
surface 4306. When the magnetic attachment body 4500 is coupled to
the article of footwear, and when the first and second mating
surfaces 4304 and 4306 are magnetically coupled to each other, the
fixed barrier 102 extends from the magnetic attachment body 4500
and into the visually engagable region of the user. As a result,
the barrier 102 can become easily detached from the magnetic
attachment body 4500 (e.g., by being vertically removed from the
cavity 4506 in the event that a force exceeding the magnetic
coupling force of the magnetic coupling system is applied between
the barrier 102 and the magnetic attachment body 4500 (e.g., as
when a user's left foot steps on a barrier 102 that is coupled to
an article of footwear worn on the user's right foot). Although
FIG. 45 illustrates only one visual stimulation assembly, it will
be appreciated that the ambulatory assistance system may comprise a
pair of such visual stimulation assemblies, one for each of a
user's shoes.
[0182] While ambulatory assistance systems have generally been
described above in conjunction with a walking assistance device
such as a pair of shoes, it will be appreciated that embodiments
disclosed herein may readily be applied to substantially any other
walking assistance device. In such a case, and with reference to
FIG. 39, a housing 3900 containing any of the visual stimulation
assemblies described above with respect to FIGS. 1A-1D and 2A-2B,
9-15, and 20-38 can be provided as an attachment to such a walking
assistance device. As shown, the housing 3900 may include a body
portion 3902 and a device attachment portion 3904. The body portion
3902 supports the barrier 102 and contains components of any of the
aforementioned visual stimulation assemblies. The device attachment
portion 3904 is the portion of the housing 3900 that is coupled to
the device. The housing 3900 can be integrally formed with the
walking assistance device or can be provided as a separate
component. Where the housing 3900 is provided as a component
separate from the walking assistance device, the device attachment
portion 3904 can be configured in any suitable manner to facilitate
coupling of the housing 3900 to the walking assistance device. For
example, in the illustrated embodiment, the device attachment
portion 3904 includes a recess 3906 defined by threaded interior
sidewalls 3908 adapted to engage a portion of a walking assistance
device.
[0183] As exemplarily shown in FIG. 40, the walking assistance
device can include a pair of canes 4000 each be fitted with one or
more housings 3900. For example, the illustrated embodiment shows
wherein the stimulus driving subsystem incorporated within each
visual stimulation assembly includes the aforementioned barrier 102
when one cane 4000 contacts the ground and another cane 4000 is
raised above the ground to a height, h. In one embodiment, a
manually operable control signal generation regulator, such as that
described above with respect to FIG. 16, may be included within the
handle 4002 of each cane 4000. Similarly, and as exemplarily shown
in FIG. 41, a pair of legs on a walker 4100 can be fitted with one
or more housings 3900. The illustrated embodiment shows wherein the
stimulus driving subsystem incorporated within each visual
stimulation assembly includes a barrier 102 when one leg of the
walker 4100 contacts the ground and another leg of the walker 4100
is raised above the ground to a height, h. In one embodiment, a
manually operable control signal generation regulator, such as that
described above with respect to FIG. 16, may be included within the
handle 4102 of the walker 4100.
[0184] In another embodiment, an elongated attachment body 4200,
essentially an elongated version of attachment body 3500, may be
coupled to a leg 4202 of a walker that has a wheel 4204 attached
thereto. The elongated attachment body 4200 includes an elongated
base 4206, a sleeve 4208 at a lower portion of the elongated base
4206, and a pin receiving opening 4210 defined within the sleeve
4208. In the illustrated embodiment, the barrier 102 may be
provided as discussed above with respect to FIG. 36 and be coupled
to the elongated attachment body 4200 in essentially the same
manner as the barrier 102 is coupled to the attachment body 3500.
In one embodiment, the elongated attachment body 4200 is attached
to the walker via a bolt (not shown) passing through the wheel 4204
and the leg 4202 and into an upper portion of the elongated base
4206. By providing the sleeve 4208 at a lower portion of the
elongated base 4206, the barrier 102 may be placed low enough over
a walking surface, enabling the user to step over the barrier
102.
[0185] It will be appreciated that the aforementioned housing 3900
is but one exemplary means with which to incorporate a visual
stimulation assembly into a walking assistance device and that any
of the aforementioned visual stimulation assemblies may be coupled
to any walking assistance device by any suitable method. For
example, any of the aforementioned visual stimulation assemblies
may be attached to a walking assistance device such as a cane or
walker as disclosed, for example, in U.S. Pat. No. 6,055,997, which
is herein incorporated by reference.
[0186] In another example, and with reference to FIGS. 46A and 46B,
a barrier 102, similar to the barrier discussed above with respect
to FIG. 36 may be coupled directly to a walking assistance device
such as a cane (or walker, etc.) 4600. Specifically, a fixed
barrier 102 can be provided as described above with respect to FIG.
36 except that the barrier 102 includes an attachment loop 4602
coupled to the coil spring 3604 via the barrier connection member
3608. In one embodiment, the attachment loop 4602 (i.e., an open
attachment loop) can be integrally formed with the coil spring 3608
and be an open structure (i.e., an incomplete loop) (e.g., as shown
in FIG. 46B).
[0187] A user can attach the barrier 102 to the cane 4600 by
manually expanding the attachment loop 4602 sufficiently to insert
a portion of the cane 4600 therethrough and arrange the barrier at
a desired position along the length of the cane 4600 (e.g., at the
bottom of the cane 4600 on a base region of a foot element 4604).
Once arranged at a desired position, the user then closes the
attachment loop 4602 sufficiently to prevent the barrier 102 from
moving along a length of the cane 4600 or rotating about the cane
4600. In one embodiment, additional means may be provided to
enhance the degree to which the attachment loop 4602 is
positionally fixed with respect to the cane 4600. For example, the
attachment loop 4602 may be glued in place to the cane 4600.
[0188] In another embodiment, and with reference to FIG. 46C, the
fixed barrier 102 can include a closed attachment loop 4606 that is
coupled to the coil spring 3604. One or more projections 4608 may
be provided within the closed attachment loop 4606 and project a
predetermined distance into the space defined by the loop 4606. In
one embodiment, each projection 4608 may be spring loaded within
the body of the closed attachment loop 4606 such that a base
portion (not shown) of each projection 4608 is biased against an
interior surface of the closed attachment loop 4606 (e.g., in the
absence of a force applied to the projection 4608) and can be
pushed away from the interior surface of the closed attachment loop
4606 (e.g., when a force is applied to the projection 4608).
Accordingly, each projection 4608 can be pressed into the closed
attachment loop 4606 in the presence of a sufficient force and each
projection 4608 extends into the space defined by the closed
attachment loop 4606 in the absence of a sufficient force. It will
be appreciated that the aforementioned attachment loop 4602 can be
provided with the projections 4608 as described above.
[0189] A user can attach the barrier 102 to the cane 4600 by
manually pressing the projections 4608 into the closed attachment
loop 4606, expanding the minimum dimension (e.g., diameter) of the
closed attachment loop 4606 sufficiently to insert a portion of the
cane 4600 therethrough and arrange the barrier at a desired
position along the length of the cane 4600 (e.g., at the bottom of
the cane 4600 on a base region of a foot element 4604 where the
projections 4608 are biased against a portion of the foot element
4604). In one embodiment, additional means may be provided to
enhance the degree to which the closed attachment loop 4606 is
positionally fixed with respect to the cane 4600. For example, the
closed attachment loop 4606 may be glued in place to the cane
4600.
[0190] The following paragraphs characterize some, but not all, of
the embodiments described herein in a general sense. For example,
in one embodiment, the invention can be characterized as an
ambulatory assistance system including a sensor adapted to generate
a sensor signal corresponding to an ambulatory characteristic
imparted by a user's foot; and a controller adapted to provide a
visual stimulus within a visually engagable region proximate to a
foot of the user in response to the sensor signal, wherein the
visual stimulus is observable by the user within the visual
engagable region and has a discrete boundary adapted to assist the
user during walking.
[0191] In one embodiment, the invention can be characterized as an
ambulatory assistance system including a sensor adapted to generate
a sensor signal corresponding to an ambulatory characteristic
imparted to a first portion of a walking assistance device by a
user; and a controller adapted to provide a visual stimulus within
a visually engagable region proximate to a second portion of the
walking assistance device in response to the sensor signal, wherein
the visual stimulus is observable by the user within the visual
engagable region and has a discrete boundary adapted to assist the
user during walking.
[0192] In another embodiment, the invention can be characterized as
a method of assisting ambulatory movement that includes receiving a
sensor signal corresponding to an ambulatory characteristic
imparted by a user's foot; generating a control signal in response
to the received sensor signal; and providing a visual stimulus
within a visually engagable region proximate to a foot of the user
in response to the generated control signal, wherein the visual
stimulus is observable by the user within the visual engagable
region and has a discrete boundary adapted to assist the user
during walking.
[0193] In yet another embodiment, the invention can be
characterized as a method of assisting an ambulatory movement that
includes receiving a sensor signal corresponding to an ambulatory
characteristic imparted by a user to a first portion of a walking
assistance device; generating a control signal in response to the
received sensor signal; and providing a visual stimulus within a
visually engagable region proximate to a second portion of the
walking assistance device in response to the generated control
signal, wherein the visual stimulus is observable by the user
within the visual engagable region and has a discrete boundary
adapted to assist the user during walking.
[0194] In still another embodiment, the invention can be
characterized as a barrier coupled to an article of footwear or
adapted to be worn on the foot of a user, wherein the barrier
comprises a flexible, resilient elongated member adapted to extend
into a visually engagable region laterally between a user's feet to
assist the user during walking.
[0195] Use of the ambulatory assistance system as described herein
above permits persons suffering from neurological disorders such as
Parkinsonism, PD, and the like, to enjoy much greater mobility by
permitting them to overcome the possibility of immobility,
especially while navigating small indoor or outdoor spaces, while
changing a walking direction, while turning (e.g., around a
corner), etc. This reduces a user's fear of being unable to move,
thereby encouraging and permitting the user to enjoy more normal
work and recreational activities. Further, the ambulatory
assistance system described above assists users to overcome
freezing episodes while leaving their hands free for other uses
(e.g., to hold a cane, walker, etc., to open a door, shake a hand,
give hugs, etc.).
[0196] While the invention herein disclosed has been described by
means of specific embodiments, examples and applications thereof,
numerous modifications and variations could be made thereto by
those skilled in the art without departing from the scope of the
invention set forth in the claims.
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