U.S. patent application number 10/028872 was filed with the patent office on 2003-06-26 for appliance to prevent locked fingers during sleep and for exercising grip.
Invention is credited to Archuleta, Donald J..
Application Number | 20030119632 10/028872 |
Document ID | / |
Family ID | 21845980 |
Filed Date | 2003-06-26 |
United States Patent
Application |
20030119632 |
Kind Code |
A1 |
Archuleta, Donald J. |
June 26, 2003 |
Appliance to prevent locked fingers during sleep and for exercising
grip
Abstract
Fingers clenched during sleep (the `trigger finger` condition)
can be prevented from locking up by limiting the degree of flexure
(closure) that the fingers can experience. An object of
compressible resilient material, which may be a soft rubber ball,
is affixed proximate the palm of the hand. As the fingers curve to
become flexed they wrap around the object and the degree of flexure
is limited to a non-locking amount by the gradual but increasing
resistance of the object to compression. To keep the ball in place
during sleep the person may wear a glove, and the ball is removably
affixed to the exterior palm portion of the glove, perhaps with
hook and loop fasteners. The glove may be of thin stretchable
material that is also breathable and having finger sections that
omit the ends thereof. The appliance can be used for hand
exercises, and different degrees of effort can be obtained by
selecting a compressible resilient object having a desired degree
of resistance to compression. And for either use, the size of the
compressible resilient object or diameter of the ball can be chosen
to fit comfortably within the partially flexed fingers of the hand.
Alternate embodiments include permanently mounting the ball to the
palm of the glove and omitting the glove in favor of elastic loops
affixed to the ball (either permanently or removably) that engage
the center fingers and the back of the hand.
Inventors: |
Archuleta, Donald J.;
(Loveland, CO) |
Correspondence
Address: |
DogsBreath Patent Agency
Attn: E. L. Miller
3512 Chestnut Ave.
Loveland
CO
80538
US
|
Family ID: |
21845980 |
Appl. No.: |
10/028872 |
Filed: |
December 21, 2001 |
Current U.S.
Class: |
482/49 ;
482/44 |
Current CPC
Class: |
A63B 21/028 20130101;
A63B 23/16 20130101; A61F 5/0118 20130101; A63B 43/005
20130101 |
Class at
Publication: |
482/49 ;
482/44 |
International
Class: |
A63B 023/14; A63B
023/16 |
Claims
I claim:
1. Apparatus to prevent locking of flexed fingers and for
exercising grip, the apparatus comprising: a glove to be worn on a
person's hand; a compressible and resilient object, of a size and
shape grippable by the fingers of the hand, and having sufficient
resistance to compression that the flexure of the fingers is
limited to an amount that they do not become locked in the flexed
state; and a fastener that affixes the compressible and resilient
object against the glove proximate the palm of the hand.
2. Apparatus as in claim 1 wherein the compressible and resilient
object is a rubber ball.
3. Apparatus as in claim 2 wherein the rubber ball is of closed
cell rubber.
4. Apparatus as in claim 2 wherein the diameter of the rubber ball
is in the range of about two to three inches.
5. Apparatus as in claim 1 wherein the hardness of the compressible
and resilient object varies from about two to twenty on the Shore A
scale as the object is increasingly compressed to about half its
thickness.
6. Apparatus as in claim 1 wherein the fastener comprises patches
of hook and loop material, one of which is affixed to the
compressible and resilient object and the other of which is affixed
to the palm of the glove.
7. Apparatus as in claim 1 wherein the glove is of leather and the
tips of the thumb and finger portions are absent.
8. Apparatus as in claim 1 wherein the compressible and resilient
object is removably fastened to the glove.
9. Apparatus as in claim 1 wherein the compressible and resilient
object is permanently fastened to the glove.
10. Apparatus as in claim 9 wherein the fastener is an
adhesive.
11. Apparatus to prevent locking of flexed fingers and for
exercising grip, the apparatus comprising: a first loop of elastic
material of circumference selected to fit snugly around the portion
of a human hand that is between the knuckles for the four adjacent
fingers and the knuckle for the thumb; a second loop of elastic
material of circumference selected to fit snugly around one or more
of the fingers and at a location thereon proximate the knuckle
where the one or more fingers are joined to the hand; a
compressible and resilient object fastened to the first loop of
elastic material at a first location on the object and fastened to
the second loop of elastic material at a second location on the
object, the first and second locations selected to accommodate the
way the object is gripped by flexing the fingers while the object
is against the palm of the hand.
12. Apparatus as in claim 11 wherein the compressible and resilient
object is removably fastened to the first and second elastic
loops.
13. Apparatus as in claim 11 wherein the compressible and resilient
object is permanently fastened to the first and second elastic
loops.
14. Apparatus as in claim 11 wherein the compressible and resilient
object comprises a rubber ball.
15. A method to prevent locking of flexed fingers and for
exercising grip, the method comprising the steps of: wearing upon a
portion of the hand a snug fitting covering of flexible material;
attaching to the covering at a location proximate the palm of the
hand a compressible and resilient object; and limiting with the
resistance of the object to compression the extent to which the
fingers of the hand can flex.
16. A method as in claim 15 wherein the limiting step further
comprises the step of preventing locked fingers by keeping the
fingers from flexing to the degree needed to become locked.
Description
BACKGROUND OF THE INVENTION
[0001] Some persons, particularly among those who are senior
citizens, are afflicted with a chronic condition whose medical term
is stenosing tenosynovitis, sometimes referred to as "trigger
finger." When this affects the fingers of the human hand the
symptoms include an inability to unbend one or more of the fingers
(open the hand) from a flexed or clenched condition (as for a
closed fist). The fingers of the hand are actuated by the motion of
attached tendons that are each enclosed in a sheath. Stenosis is
the constriction of a passage, such as a duct or sheath, and
tenosynovitis is inflamation of a tendon. The stenosis of the
tendon may be the result of an inflamation of it, as well. While
the cause of these conditions is not well understood, the result is
that a tendon can "get stuck" in its sheath. When tension applied
via that tendon was how a finger became bent, then that finger is
also "stuck" and cannot easily be straightened, especially when it
has been fully, or almost fully, flexed (bent). A fully retracted
and stuck tendon enjoys a mechanical advantage over its counterpart
that straightens the finger, which is why the finger appears
locked. There is often pain associated with this condition, and
treatments include local injection of various drugs and even
surgery to slit the sheath. Despite such interventions the
condition often recurs.
[0002] This locking up of fingers is frequently avoidable during
waking hours by consciously taking care to not manipulate the
fingers of the hand in ways that will cause them to lock up. That
is, by limiting the degree of flexure. While this may be a minor
aggravation and represents some loss of dexterity, it is often
manageable and acceptable as simply part of the price for growing
old. But in some cases the victim clenches his fists during sleep,
with the result that upon waking he or she must undergo a sometimes
painful straightening process, made much worse if fingers on both
hands are afflicted. If only one hand is afflicted, then the other
hand can be used to pry the afflicted fingers open, after which
they are again usable if not inadvertently allowed to again lock
up. But if most of the fingers on both hands are afflicted, then
the sufferer has a real problem, and must resort to desperate means
to get his hands back in service: the services of another person
(which may not be available), hooking the fingertips over the edge
of a table and pulling, pulling with the teeth (assuming one
doesn't need to put them in, first . . . ) and so on. All in all,
it is not a pleasant way to start the day, and this condition may
in fact even be hazardous (or at the very least, quite
inconvenient) under certain middle-of-the-night emergency
situations where one needs the use of his hands to quickly open a
window, climb out a window, deal with a door lock, open a closed
door, or simply use the bathroom.
[0003] It would be desirable if there were a convenient and
effective way of preventing this condition from resulting in locked
fingers after sleep.
[0004] There are also individuals who need or desire to exercise
the muscles of the hand, perhaps to maintain the use of their hands
in face of declining functionality and as part of a physical
therapy regimen, or to improve their grip for recreational purposes
(e.g., rock climbers). There are many hand-held appliances known
for such exercise, but most are not adjustable as to hand size and
degree of strength required for use, and they generally not captive
within the hand during use. It would be desirable if there were an
inexpensive, durable, adjustable and captive hand exercise
appliance. It would be especially desirable if it were also
effective in preventing the condition of locked fingers during
sleep.
SUMMARY OF THE INVENTION
[0005] A solution to the problem of fingers that lock up from fists
clenched during sleep (the "trigger finger" condition) is to limit
the degree of flexure (closure) that the fingers can experience.
This may be done by affixing an object of compressible resilient
material proximate the palm of the hand, so that as the fingers
curve to become flexed they wrap around the object and the degree
of flexure is limited by the gradual but increasing resistance of
the object to compression. The involuntary flexure of the fingers
during sleep still occurs, but it is limited by the resistance of
the compressible resilient object so that it is less than the
amount needed to produce locking. The compressible resilient object
may be a soft rubber ball. To keep the ball or other compressible
resilient object in place during sleep the person may wear a
comfortable glove on the hand, and the compressible resilient
object is removably affixed to the exterior of that portion of the
glove that covers the palm of the hand. If the compressible
resilient object has the shape of a ball, then the fingers will
close around it in a natural and comfortable fashion, as if it were
being gripped and squeezed on purpose. The manner of affixing the
compressible resilient object may be with pieces of hook and loop
fastener (known under the trademark Velcro). The glove may be of
thin stretchable material that is also breathable (e.g., leather
with sewn-in elastic) but having finger sections substantially
shortened by omitting the ends thereof (as if cut away). The
glove/fastener/ball combination holds the ball in place without
conscious effort by the wearer, even if the hand relaxes entirely
during portions of sleep. The ball is thus in place if involuntary
flexure occurs later. The same appliance can be used to
deliberately perform hand exercises, if desired. Different degrees
of difficulty (resistance to squeezing) can be obtained by removing
one compressible resilient object (which may be a rubber or plastic
ball) and replacing it with another one having a different degree
of resistance to compression. And for either use, the size of the
compressible resilient object or diameter of the ball can be chosen
to fit comfortably within the partially flexed fingers of the hand.
And also for either use, the compressible resilient object or ball
is readily removable. A ball that has been removed makes it easier
to put on the glove (and the ball is then subsequently attached),
and a detachable ball makes response to other tasks (answering the
phone, opening a door) easier by allowing quick and easy removal of
the ball without bothering to take off the glove. In an alternate
embodiment elastic loops attached to a soft rubber ball engage the
center fingers and the back of the palm to hold the ball in place,
without the use of a glove. The attachment of the elastic loops to
the compressible resilient object may either be removable, as with
hook and loop fasteners, or be permanent.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a perspective view from the side of a left human
hand and an appliance for preventing locked fingers during sleep
and for exercising grip, but with a ball portion detached from a
glove portion worn on the hand;
[0007] FIG. 2 is a perspective view from below of the left hand and
appliance of FIG. 1, with the ball portion in place and the hand
gripping the ball;
[0008] FIG. 3 is a perspective view from above of the hand and
appliance of FIG. 2; and
[0009] FIG. 4 is a perspective view from above of an alternate
embodiment wherein elastic loops hold the soft rubber ball in
place, without the use of a glove.
DESCRIPTION OF A PREFERRED EMBODIMENT
[0010] Refer now to FIG. 1, wherein is shown a perspective view 1
of a left human hand 2 wearing a glove 3 and equipped to removably
attach a rubber ball 4 such that the ball 4 can be comfortably
gripped by the thumb 7 and other fingers (8-11) of the hand 2. We
have shown a ball 4 in FIG. 1 (as well as in FIGS. 2 and 3 to
follow), but it will be understood that the ball 4 is merely a
preferred instance of a compressible resilient object that the hand
2 is to grip. The compressible resilient object might instead have
the shape of a cylinder, or be an oblate spheroid (egg shaped), for
example.
[0011] The ball 4 is to be nestled and retained in the palm of the
hand 2 when it is being gripped. While awake one can deliberately
do this by so placing the ball and then flexing the fingers (8-11)
and thumb 7. But for certain exercise situations (poor muscle
control or impaired coordination), or for holding the ball in place
during sleep, the ball needs to be made captive for it to remain
retained. A preferred way to do this is with pieces of hook and
loop faster (commonly known by the trademark Velcro). Accordingly,
note region 6 on the glove 3, whereat is affixed a circular patch
of the hook part of the hook and loop fastener. A corresponding
portion 5 of loop material is affixed to the ball 4. These circular
patches may be in range of about one to two inches in diameter, and
preferably they are attached by a flexible adhesive, such as
contact cement, silicone rubber, vinyl cement, etc. The hook
portion 6 might also be sewn onto the palm of the glove 3.
[0012] In brief, then, to use the appliance one puts on the glove,
and if the ball is not already attached, extends the fingers to
expose the palm, and then mates the loop portion 5 on the ball 4
with the hook portion 6 on the glove 3. It will be noted that the
ball 4 can also be readily removed to permit unfettered use of the
hand without the need to also remove the glove. It will further be
appreciated that, just as the glove might need to be sized to fit
the hand, selection of compressible resilient objects (balls 4) of
different sizes (or having different degrees of resistance to
compression) might be desirable, and is facilitated by the
removable attachment property described above.
[0013] We turn now to the ball 4, with the understanding that much
of what we say about it pertains to grippable compressible
resilient objects of other suitable shapes. First, for an adult
male the ball 4 might be about two and one half inches in diameter,
and be made of soft rubber. As for size, it needs to be small
enough that it can be gripped (i.e., the fingers do actually wrap
around it), but not so small that a thumb 7, little finger 11, or
other finger, can become fully flexed by sliding off to the side of
the ball (or other shape). The ball 4 or other compressible
resilient shape could also be made of a suitable plastic material.
A tennis ball, while about the right size, is way too stiff for
this application and has found to be uncomfortable. Furthermore, it
is possible that its fuzzy exterior is a detriment; it interferes
with attaching the loop portion 5, and complicates the task of
keeping the ball 4 clean. Instead, it is preferred that the ball 4
be of closed cell foam rubber, with a smooth exterior surface.
[0014] Next, consider the hardness and compressibility of the ball
4. It is, as rubber balls go, pretty soft. One closed cell foam
rubber ball of two and one half inches in diameter that was found
to be quite suitable measures from about two to three on the Shore
A scale using a durometer from NEW AGE Industries, Jenkinstown, Pa.
and conforming to ASTM 2040 and DIN 53505. Those values are for
initial contact with the durometer case that does not seriously
deform the ball (the penetrator is, of course, in full contact). As
the ball is compressed by further motion from the case of the
durometer, say, to somewhat less than half its diameter, the ball
begins to exhibit less compliance and its effective hardness
increases to around twenty on the Shore A scale. Measured another
way, the two and one half inch ball was placed between two parallel
surfaces and its deformation was measured with different amounts of
applied force. With five pounds applied the thickness was reduced
to about one and three quarters inches; with ten pounds, to about
an inch and a quarter; with twenty pounds to about seven eights of
an inch; and, with twenty-five pounds to about three quarters of an
inch. Once the thickness of about three quarters of an inch is
reached, very little additional compression is observed with
increased force. It appears that these results (and also the
durometer results) reflect the existence of a cellular structure
within the ball. Initial compression encounters less resistance as
the cells are deformed. However, once all the cells along the
direction of an applied force are fully deformed the adjacent cell
walls are in successive contact. The material then begins to behave
as if it were a slab of rubber, and exhibits a greater degree of
hardness and resistance to compression.
[0015] An adult male in good health with strong hands is able to
compress this same ball to a thickness of about thirty percent of
its original diameter of two and one half inches, or to about three
quarters of an inch. Such extreme compression would most likely
occur only during deliberate exercise, but not during sleep. During
sleep it can be expected that compression caused by involuntary
clenching of the hand is much less, say, to only about seventy
percent of original thickness.
[0016] The ball 4 (or other compressible resilient object) is
resilient, in that it immediately returns to its normal shape when
compression is removed.
[0017] A brief note is in order about the disc shaped patch 5 of
loop material. It may be circular, but since it is not being
affixed to a flat surface it will exhibit ridges when forced to
conform to a spherical surface. It may, therefore, be desirable to
cut a few thin wedge shaped slices out of the patch 5 before
affixing it to the ball 4. Sticky backed merchant hook and loop
fastener material has been found suitable, and this may obviate the
need for a separate adhesive. It will be appreciated, however, that
there are other ways of affixing the disc shaped patch 5 to the
ball, and that those include adhesives, as well as mechanical
techniques such as staking it, clipping it, etc.
[0018] We turn now to the glove 3. It will be appreciated that
there is no need to fabricate a special glove; the modifications
described herein can be performed to a suitable merchant glove and
the results will be entirely satisfactory. That said, there are
nevertheless certain desirable attributes that the glove ought to
have. Chief among these are that it must fit comfortably and
somewhat snugly. The material ought to be slightly stretchy, and
not trap moisture against the skin (i.e., be breathable). For these
reasons a glove made of thin leather is preferred. Examples include
goatskin, sheepskin and pigskin, in the range of about 0.015" to
0.025" thick. The glove may have various ventilation holes 12
therein, as well as an elastic wristband and an adjustable strap 13
across the back.
[0019] An example of a suitable merchant glove in commerce is a
glove intended for use by golfers, manufactured of cabretta
goatskin and sold by APPLE SPORTS Inc. of Ronkonkoma N.Y., 11779
under license from the Wilson Sporting Goods Company and as part of
its "Ultra" line. Wilson Sorting Goods is located at 8700 W. Bryn
Mawr Ave, Chicago, Ill., 60631. It will, of course, be appreciated
that there are many suitable gloves available, and that one of
those may be used as a component, or, that an original glove could
be constructed for this purpose.
[0020] The disc 6 of hook fastener material may be attached to the
palm of the glove with a strong and flexible adhesive, such as
contact cement or silicone rubber. Stitching it in place is also
possible, although some versions of hook fastener material have
rather stout plastic hooks, which may make sewing difficult. An
alternative (whether sewn or not) is to make the disc 6 be the more
fibrous loop material, and put the hook portion on the ball,
instead. Especially in this case (owing to the stiffness of a patch
of hook material), the comment above about removing thin wedge
shaped slices from the disc being attached to the ball is
particularly appropriate.
[0021] The exact diameter of the discs 5 and 6 of the hook and loop
fastener material is not particularly critical, although there are
certain considerations leading to a useful maximum and minimum. If
the diameter is too small, then the ball or other compressible
resilient object may pivot unduly off to one side, and by not being
in the proper place, allow a finger or thumb to lock up. Also.
There may not be sufficient retentive force to keep it in place
during use. On the other hand, if the diameter of the disc 6 on the
palm of the glove is too large, then there may be excessive freedom
of location in locating the ball 4 against the hand, and once again
the ball 4 is not in the proper position. Also, if the disc 5 on
the ball is too large, then a waste of material occurs, since owing
to the curvature of the ball only a certain amount of the fastener
5 on the ball will come into contact with the fastener 6 on the
palm when the hand is not fully curved (fingers extended), anyway.
Diameters of about three quarters of an inch to about two inches
have been found satisfactory, with a preference of one and three
quarters of an inch for adults.
[0022] As shown in the figures, the finger tips and thumb tip of
the glove 3 have been removed at about where the glove reaches the
joint nearest the knuckle. While not absolutely necessary, it is
nevertheless desirable for these reasons. First, it increases
comfort, and removes the length of one's fingers as a factor in
proper fit. Next, it facilitates the normal use of the hand after
the ball 4 is temporarily detached to accomplish some intervening
task that arises, without having to also remove the glove. Examples
might be: finding and activating a light switch in the dark,
working a zipper, unlocking a door, etc.
[0023] The glove 3 shown in FIG. 1 includes a strap 13. Its
location is better shown in FIG. 3, but it will be appreciated now
that such a strap helps keep the glove in place (a definite comfort
issue) while allowing easy application and removal. It is preferred
that the strap 13 use a hook and loop fastener, also.
[0024] Finally, it will be noted that we have shown only a left
hand 2 and a left-handed glove 3 and ball 4 therefor. It will of
course be appreciated that a right-handed version exists, and that
either can be used in isolation, or that they may be both used
together.
[0025] Now turn to FIG. 2, which is a perspective view 17 from
below of the left hand 2 and glove/ball (4/3) combination
(appliance) of FIG. 1. It shows the ball 4 attached to the glove 3,
and the thumb 7 and various finger (8-11) gripping the ball 4,
either for exercise, or involuntarily during sleep.
[0026] FIG. 3 is a perspective view 18 from above, of the situation
in FIG. 2. Note the strap 13, whose underside has a region of loop
fastener that bears against a region 14 of hook fastener affixed to
the back of the glove. It will be appreciated that, in addition to
its utility in helping to produce proper fit, the strap 13 provides
an ideal location for a product identification logo. Finally, note
also the regions 15 and 16 of elastic material included to increase
the glove's ability to conform comfortably to the wearer's
hand.
[0027] We turn now to a discussion of alternate embodiments,
including the one shown in FIG. 4. FIG. 4 is a perspective view
from above of a ball 4 or other compressible resilient object that
has affixed to it two bands or loops 20 and 21 of elastic material.
There is no glove used in this embodiment, resulting in a monetary
cost savings, but perhaps at some intangible cost of less perceived
comfort, and perhaps reduced durability. In any event, arrows 22
and 23 indicate the direction that a right hand (not shown) would
approach this embodiment. All four fingers (but not the thumb)
would pass in the direction of arrow 22 through the loop or band
21, which is sized to fit snugly around the widest part of the
hand, between the knuckles of the four fingers and the knuckle of
the thumb. The center two fingers continue on to pass through loop
or band 20 of elastic material, which is sized to fit snugly over
those center two fingers of the hand. The thumb extends around the
outside of the band or loop 21, in the direction shown by arrow
23.
[0028] We have shown and described the situation for a right hand
approaching the ball 4 from the right to the left. By turning the
ball one hundred and eighty degrees, a left hand can approach from
the left to the right; the same ball and loop combination works for
either hand.
[0029] Loop or band 20 may be of three eighths inch wide elastic
material, while loop or band 21 may be of elastic material that is
one half inch wide. These widths are, of course, merely
illustrative. The elastic material may be sewn into the loops 20
and 21 (such a seam is not shown), preferably at locations least
likely to cause discomfort; the locations 24 and 25 of contacting
the ball are preferred. It will also be appreciated that at the
locations 24 and 25 the manner of affixing the loops or bands 20
and 21 to the ball may be either permanent or removable. That is,
loops 20 and 21 can be permanently affixed to the ball with
adhesive or mechanical means, or removably affixed with regions of
hook and loop fastener material (not shown), as in the embodiment
of FIGS. 1-3. The two loops 20 and 21 could also be incorporated or
replaced by a wound, woven or crossed webbing of elastic material
that encloses the hand while providing attachment to the
compressible resilient object.
[0030] Finally, it will be appreciated that hook and loop fastener
material, while preferred, is not the only manner of removable
attachment that is possible for the embodiments described herein.
Other possibilities include snaps, latches, laces and buckles.
These same methods of attachment, along with the use of a suitable
adhesive, may also be used to attach the compressible resilient
object when there is no intent to have it be removable.
* * * * *