U.S. patent application number 09/909653 was filed with the patent office on 2002-01-24 for insole with improved cushioning for sides of feet and heels.
This patent application is currently assigned to Kellerman Company LLC. Invention is credited to Kellerman, David, Tolwin, Hindy Kellerman.
Application Number | 20020007568 09/909653 |
Document ID | / |
Family ID | 26914252 |
Filed Date | 2002-01-24 |
United States Patent
Application |
20020007568 |
Kind Code |
A1 |
Kellerman, David ; et
al. |
January 24, 2002 |
Insole with improved cushioning for sides of feet and heels
Abstract
A heel cup (44) permits the user to custom fit each foot to
various shaped footwear, using adjustable bottom wall and side wall
cushions (76, 246), thereby providing optimum comfort and safety
whether simply walking or during vigorous sports activity. The heel
cup includes bottom, side and heel portions (72, 74), an attachment
mechanism secured at least to one of the portions, and an insole
(54, 78) secured to a hook and loop attachment mechanism for
supporting the foot. A complete adjustable insole is together used
with an adjustable sidewall cushioning because it is difficult to
reach into the interiors of footwear to make adjustments, such as
installing moving or removing a cushion to obtain necessary
comfort. Attachments for the insole may comprise tabs (158, 172,
188) to which the insole can be secured. A heel grip bracket (420)
with a cushion (422) may be mounted on the heel portion of the
bracket and one or more cushions (438) may be coupled to cushion
(422) on its sides.
Inventors: |
Kellerman, David; (Santa
Barbara, CA) ; Tolwin, Hindy Kellerman; (Beverly
Hills, CA) |
Correspondence
Address: |
Lewis B. Sternfels
Law Offices of Clark D. Gross
Suite 300
12304 Santa Monica Boulevard
Los Angeles
CA
90025-2593
US
|
Assignee: |
Kellerman Company LLC
|
Family ID: |
26914252 |
Appl. No.: |
09/909653 |
Filed: |
July 19, 2001 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
60219792 |
Jul 19, 2000 |
|
|
|
60276595 |
Mar 16, 2001 |
|
|
|
Current U.S.
Class: |
36/28 ; 36/35R;
36/37 |
Current CPC
Class: |
A43B 7/1464 20220101;
A43B 7/16 20130101; A43D 999/00 20130101; A43B 19/00 20130101; A43B
7/28 20130101 |
Class at
Publication: |
36/28 ;
36/35.00R; 36/37 |
International
Class: |
A43B 013/18 |
Claims
What is claimed is:
1. A heel cup for placement in a shoe comprising bottom, side and
heel portions, an attachment mechanism secured at least to one of
said portions, and at least one foot support device secured to said
attachment mechanism for supporting a foot.
2. A heel cup according to claim 1 in which said foot support
device comprises a cushion.
3. A heel cup according to claim 1 in which said side portion
comprises opposing side sections and said foot support device
comprises a cushioning system secured to at least one side of said
side portion for inhibiting side-to-side movement of the foot.
4. A heel cup according to claim 1 in which said foot support
device comprises an insole extending as an integral extension from
said bottom portion.
5. A heel cup according to claim 1 in which said foot support
device comprises an insole secured to said bottom portion.
6. A heel cup according to claim 5 in which said bottom portion
comprises a ledge extending from said side and heel portions.
7. A heel cup according to claim 6 in which said ledge is fully
closed for attachment to and support of said insole about its
entire periphery.
8. A heel cup according to claim 1 in which said side portion
comprises opposing side sections which extend to the arch portion
of the shoe.
9. A heel cup according to claim 8 in which said opposing side
sections extend upwardly to at least the foot's ankles.
10. A heel cup according to claim 1 in which said side portion
comprises opposing side sections which extend to the toe portion of
the shoe.
11. A heel cup according to claim 10 in which said opposing side
sections extend upwardly to at least the foot's ankles.
12. A heel cup according to claim 11 in which said opposing side
sections slope downwardly to the arch portion of the shoe.
13. A heel cup according to claim 11 in which said opposing side
sections slope downwardly to the arch portion of the shoe and
extend therefrom to the toe portion of the shoe.
14. A heel cup according to claim 1 in which said bottom portion
comprises tabs angularly bent from said side and heel portions.
15. A heel cup according to claim 14 in which said tabs are formed
from a cut in half laminated strip having a plurality of closed
opening therein wherein the cut was extended through the closed
openings.
16. A heel cup according to claim 1 in which said foot support
device comprises an insole extending from said bottom portion and a
cushioning pad system secured to said insole for attending to
podiatric problems associated with the foot.
17. A heel cup according to claim 1 in which said foot support
device comprises an insole extending from said bottom portion and a
cushioning pad system secured to said insole for attending to
podiatric problems associated with the foot, and further comprising
perforations in said insole.
18. A heel cup according to claim 1 in which said foot support
device comprises a heel grip bracket.
19. A heel cup according to claim 18 in which said heel grip
bracket includes a base portion and wall portions, and a spring
bias coupling between said base and wall portions to effect spring
tension to maintain inwardly pressure against a user's foot.
20. A heel cup according to claim 18 in which said foot support
device further comprises a cushion insert conformably mounted
within said heel grip bracket.
21. A heel cup according to claim 20 in which said heel cup bracket
includes terminal portions positioned adjacent a user's ankles,
further comprising at least one cushion mounted on said cushion
insert within said heel grip bracket terminal portions.
22. A heel cup according to claim 18 in which said foot support
device further comprises a pressure relief cushion mounted in an
opening in said heel grip bracket.
22. A method for supporting a foot in a heel cup comprising the
step of placing at least one foot support device in the heel
cup.
23. A method according to claim 22 in which the heel cup includes
opposing side sections and further comprising the steps of
utilizing a cushioning system secured to at least one side of the
side portion for inhibiting side-to-side movement of the foot.
24. A method according to claim 22 further comprising the step of
forming tabs on a bottom portion angularly bent from side and heel
portions of the heel portion.
25. A heel cup according to claim 24 further comprising the steps
of forming the tabs from a laminated strip having a plurality of
closed opening therein and cutting the strip in half through the
closed openings.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. Provisional
Applications No. 60/219,792 filed Jul. 19, 2000 and No. 60/276,595
filed Mar. 16, 2001.
REFERENCE REGARDING FEDERAL SPONSORSHIP
[0002] Not Applicable
REFERENCE TO MICROFICHE APPENDIX
[0003] Not Applicable
BACKGROUND OF THE INVENTION
[0004] 1. Field of the Invention
[0005] The present invention relates to orthotics or insoles for
shoes and, more particularly, to stabilize, cushion and provide
pressure relief of both the bottom and sides of the feet and to
protect the feet from impact and shock, in particular, by use of
customizable heel cups and the like.
[0006] 2. Description of Related Art and Other Considerations
[0007] Heel cups, which may be characterized as falling within the
general category of insoles, are usable alone or insertable in
footwear to provide support and cushioning for the heal, or other
foot parts, such as are disclosed in U.S. Pat. Nos. 4,179,826,
4,928,404, 6,041,524 and 6,059,744. These devices are generally
molded in a set design and, therefore, are not readily customizable
or adjustable to accommodate many different foot variations. They
are also very expensive to manufacture, as requiring a usually very
high mold cost. For example, it is costly to mold side walls over
1/2" in height for insoles used to fit into footwear. Use of an
improperly fitting heel cup or similar insole either fits the foot
too snugly, or permits the foot to move with excessive side to side
or lateral movement within the footwear. Thus, variations in the
widths of the forefoot and the heel area cannot be accommodated,
except in custom-manufactured and, accordingly, expensive models.
The corollary is that standard, generally molded, insoles lack
sufficient sidewall height and do not provide a means of securing
feet with narrow heels from side to side sliding which can result
in painful plantar fasciatus.
SUMMARY OF THE INVENTION
[0008] These and other problems are successfully addressed and
overcome by the present invention. Heel cups are cushioned and
otherwise modified to tailor them as needed by any person, whether
the individual or foot-care professional, as appropriate to the
foot and foot condition of the individual user, such as by adding
cushions on one or more vertical inside and/or outside walls of the
heel cup, or by changing the shape or dimension of the wall
portions or elongating the bottom portion. One or more stabilizing,
cushioning and pressure relief mechanisms are provided as built-in
or modified adjuncts to the heel cup. The preferred cushion
attachment means is by a hook-and-loop fastening or attachment
system. Where a component of the system may contact the user, it is
further preferred that the component be the loop component to avoid
irritation to the skin.
[0009] For example, as the user ages, the foot changes, but not
necessarily in all particulars, e.g., the heel may remain the same,
but the rest of the foot may broaden out. For sports and like
activities, side-to-side movement must be controlled; likewise,
weak ankles and flat foot conditions need to be addressed. Thus,
such modifications as specialized cut outs, notching and slits may
be provided in the heel cup for insertion of an orthotic therein.
The heel cup may be molded or otherwise provided with an integral
orthotic, or a full or partial ledge and/or bottom.
[0010] The present invention can be installed in shoes and some
sandals. It can be installed in boots and, using firmer cushions
and higher and thicker sidewalls, be useful in sports such as
skiing and climbing which require a firm and individualized fit
between the foot and the boot. Many different materials may be used
and incorporated into a heel cup design.
[0011] In addition, no specific hook and loop attachment mechanism,
such as the VELCRO.RTM. hook and loop attachment mechanism, need be
used to achieve relocation of cushion pads for optimum support of
the feet to minimize discomfort.
[0012] Loop cloth is laminatable to both sides of the vinyl sheet
and, thereby, to enable cushion pads with hook cloth to be attached
to the loop cloth, such as may be useful to provide relief from
heel pain for some people, and avoids the problems associated with
the use of conventional sheet molding processes.
[0013] Several advantages are afforded by the present invention,
such as lower cost, improved heel and side of foot cushioning, and
the avoidance of the need for foot pad adjustment to achieve
adequate foot support. Use is made possible of complete adjustable
insoles, as provided in prior inventions of one or both of the
herein-named inventors, with the adjustable sidewall cushioning of
the present invention, to avoid any difficulty in reaching into the
interiors of footwear to make adjustments, such as installing
moving or removing a cushion to obtain necessary comfort. The user
can custom fit each foot to various shaped footwear, thereby
providing optimum comfort and safety whether when simply walking or
during vigorous sports activities. Complete flat and sidewall
combination assemblies can easily be removed from footwear,
adjusted, if need be, or transferred to other footwear and adjusted
again to that footwear.
[0014] Although the adjustable sidewall cushion of the present
invention is designed to be used with hook and loop flat insoles
disclosed in previous patents of one or both of the herein-named
inventors, it is feasible to construct footwear with loop cloth
inside covered sidewalls where needed for attachment of hook
covered cushions, such as manufactured under the VELCRO.RTM.
trademarked loop and hook cloth products.
[0015] Layers of loop cloth can be bonded to either one or both
sides after molding the cushion material. The inability, to mold
shapes having high enough walls to cup the sides of the heels and
to provide the required rigidity to stay vertically, is
overcome.
[0016] For attaching these insoles to the same sidewall tabs, the
loop side of the tabs can be covered with small hook tabs which
wrap around the existing loop tabs to grip the hook tabs to the
loop underside of the insole.
[0017] The side walls of generally foam cushioning have
demonstrated improved foot comfort and a means of securing the feet
from side to side or lateral movement within footwear. It is
difficult and costly to permanently attach such cushioning to the
inside walls of footwear.
[0018] Alternatively the insoles and tabs can be manufactured to
have loop underside insoles and tab hook surfaces on top to grip
the insoles.
[0019] To accommodate variations in the forefoot width and in the
heel area, the sidewall cushion width can be made removable and
changed to suit individual feet and varieties of footwear,
especially when such footwear is not commonly manufactured.
[0020] Other aims and advantages, as well as a more complete
understanding of the present invention, will appear from the
following explanation of exemplary embodiments and the accompanying
drawings thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a cross-sectional side view of a shoe with an
orthotically formed heel cup inserted therewithin, which is typical
of one of the many types generally encompassed by the present
invention.
[0022] FIG. 2 is a view taken along line 2-2 of FIG. 1 of the shoe
and orthotic illustrated therein.
[0023] FIGS. 3a-3c are, respectively, (a) a side view, in
cross-section, of one embodiment of a medium length heel cup formed
from a lamination of a thin, relatively stiff plastic sheet of
vinyl and VELCRO.RTM. loop cloth material, (b) a top view of the
FIG. 3a embodiment having a loop cloth top surface, and (c) a view
of the FIG. 3b embodiment after die cutting a portion to provide
for more room in the show. A loop covered rim is left in place for
attaching the hook bottom of an insole to create a flat insole
attached to a heel and side of foot assembly. The hook bottom can
hold loop covered cushions in place and the sidewalls hook covered
cushions also. Hook coverings are not placed on cushions facing the
foot to avoid roughness of feel and irritation. After die cutting
away the bottom, a ledge of plastic and loop remain onto which the
hook bottom of the insole is attached.
[0024] FIG. 4 is a view similar to that depicted in FIG. 3c but
with additional ledging for more secure insole attachment, if
needed. Here, for example, the vertical wall and the mounting ledge
are formed from a loop/plastic material.
[0025] FIGS. 5a-5d are several views of a short length heel cup
embodiment of the present invention. FIG. 5a is a side view of a
short length in which a sheet of vinyl film in the range of 0.015
inches thick is laminated to a sheet of VELCRO.RTM. loop cloth.
Using a last suitable for this heel cup embodiment, the laminated
sheet assembly is vacuum thermo-formed and die cut into a heel cup.
The loop cloth side faces the heel. FIG. 5b is a view of the heel
cup embodiment illustrated in FIG. 5a looking toward the back of
the cup. To obtain cushioning that will secure the heel in the
shoe, cushion strips or shaped cushions with a VELCRO.RTM. hook
back layer can be attached to the VELCRO.RTM. loop layer on the
front walls. FIG. 5c is an expanded view of the heel cup embodiment
shown in FIG. 5b with some cushions attached thereto, with one
strip on the back, and two strips attached on the respective sides
of the cup inside walls. FIG. 5d is a view of an elongated heel cup
embodiment, which has been lengthened through use of an insole
which has a VELCRO.RTM. hook bottom attached to the VELCRO.RTM.
loop bottom of a short length heel cup, such as depicted in FIG.
5c. This combination provides for excellent heel support on the
sides. The back attached cushion prevents irritation on the back of
heel due to shoe rubbing the skin as the foot moves up and down,
typically while the wearer is playing tennis.
[0026] FIGS. 6a and 6b are, respectively, (a) a side view of
another heel cup embodiment with long, low height sidewalls which
can extend to about two-thirds the foot length to protect the sides
of the feet from irritation from stitching and any existing rough
interior walls, and (b) a top view of the FIG. 6a embodiment
showing its loop covered ledge. An insole with VELCRO.RTM. hook
bottom can be attached to the loop layer on the ledge which is
capable of providing additional sidewall support.
[0027] FIGS. 7a-7c are, respectively, (a) a top view of a heel cup
embodiment which is permanently attached to a heel cup section, (b)
a composite laminated sheets material from which the heel cup and
insole embodiment of FIG. 7a may be vacuum formed and die cut, and
(c) a view of a die cut sheet laminate useful in the embodiment
depicted in FIG. 7a comprising a cushion layer, a thin vinyl layer
and a thin layer of grip material of, for example, rubber or
plastic. This embodiment is useful as a household slipper.
[0028] FIG. 8 is a view of another heel cup embodiment similar to
that illustrated in FIG. 5d, but with sidewalls which may be a full
insole length or about one half to approximately two thirds length.
For this embodiment, the lamination portrayed in FIG. 7c may have
an additional cushioning layer between the grip material and the
vinyl.
[0029] FIGS. 9a-9h depict the formation of an alternate heel cup
embodiment. FIG. 9a is a view of a flat laminated sheet for use in
this embodiment. FIG. 9b is a flat or plan view of a sidewall
pattern which has been cut or otherwise removed from the sheet
shown in FIG. 9a, such as by die cutting, laser cutting or water
jet cutting. FIG. 9c is a partial configuration of the cut sheet
shown in FIG. 9b whose tabs are bent as legs having insole
attachment material thereon. FIG. 9d illustrates a curved formation
of the FIG. 9c configuration. FIG. 9e is a view of the formation
depicted in FIG. 9d with an insole mounted atop its tabs at the
rear foot heel cushioning section, and is particularly useful for
users having very narrow heels which can be made very secure, such
as by mounting additional cushions with a hook area on one side to
attach to the loop side of the side wall, e.g., as shown in FIG.
9f. FIG. 9g is a top view of an insole mounted on a longer length
sidewall cushioning assembly, in which several loop tabs under the
insole keep the sidewall and the insole together as one completely
adjusted assembly which can readily be removed and re-inserted into
footwear. The sidewall strip can be one continuous length around
the insole periphery or a series of shorted spaced apart lengths.
Separate lengths can be mounted around in the toe box area if
needed. It has been demonstrated that superb comfort has been
achieved due to relief from chafing of the skin due to the rougher
feel of the inner walls, seams, stitching, etc. which is typical of
most footwear. The sidewall can be removed and periodically washed,
dried and re-inserted. By the above advantages the cost and comfort
of low cost footwear will be more advantageous than very costly
footwear. FIG. 9h shows a side view of sidewall cushioning mounted
on tabs and ready to be inserted into footwear. The sidewall height
is lower than the show sidewall height but can be shaped to help
remove virtual side of foot irritation such as corns or bunions.
The user can readily trim by scissor sidewall height or remove and
or replace all or portions of the sidewall or add additional hook
on one side cushions where thicker cushioning is indicated. By
adding and relocating the underside of the insole the complete
assembly becomes the ultimate in adjustability for best comfort the
individual and his or her foot problems and differences in footwear
for everyone seeking different shoe profiles, heel height, sense of
feeling of fit and of styling. For people more dependent on medical
expertise this system is a useful tool to obtain superior fitting
results and at lower cost.
[0030] FIGS. 10a-10f shown a further heel cup embodiment. FIG. 10a
shows a side view of a sidewall strip with a loop layer on a
plastic layer which has a narrow shelf which attaches to the hook
bottom of the insole. FIG. 10b shows a side view of a portion of
the insole with the FIG. 10a strips attached to the medial and
outside edges of the insole. FIG. 10c is a view of a flat sheet of
the attachment after die cutting to provide flexibility when
attached around the curving periphery of the insole. FIG. 10d shows
the forming of the FIG. 10c die cut sheet which may be done during
die cutting or later to suit production or shipping needs. If the
item is shipped flat and have the customer bend the tabs up,
shipping costs can be reduced. FIG. 10e is a side view of a portion
of an insole with a side cushion mounted on an attachment. FIG. 10f
is a view of a surface with an additional cushion mounted thereon,
if thicker cushioning is needed in a certain area.
[0031] FIGS. 11a-11e depict an alternative heel cushion embodiment.
FIG. 11a is a view of strip of an attachment loop and plastic sheet
lamination after die cutting of suitable holes therein, from which
prototype tabs are to be formed. FIG. 11b is a view of the FIG. 11a
strip after its being cut into half sections to form a plurality of
tabs. FIG. 11c is a view showing a 90.degree. bending of the FIG.
11b tabs. FIG. 11d is an edge view of the FIG. 11c strip. FIG. 11e
is a view of the FIG. 11d strip with an insole mounted thereto.
[0032] FIGS. 12a-12f illustrate methods of augmented heel cup
embodiments. FIG. 12a is a side view of heel cup. FIG. 12b is a top
view of the FIG. 12a heel cup with a hole formed therein. FIG. 12c
is a side view of an assembly incorporating the FIG. 12b embodiment
with an insole attached thereto along with, on its bottom, a
covered cushion connected through the hole by a mating attachment
with the insole. FIGS. 12d and 12e respectively are side and bottom
views of the heel cushion depicted in FIG. 12c and is adapted for
possible relief of plantar fasciatus pain when the calcaneus bone
rear bottom can fit into the hole to relieve some of the pressure.
FIG. 12f is a top view of the insole, cushion and cup assembly, in
which the holes can be rectangular or otherwise shaped.
[0033] FIGS. 13a-13c are further heel cup embodiments depicting (a)
the top view of the left foot insole mounted on a heel cup, (b) the
side view of the FIG. 13a embodiment with typical cushions shown
attached to the underside of the insole, and (c) a view of the
assembly from its forefoot side.
[0034] FIGS. 14a-14c illustrate views of other heel cup embodiments
with various advantages in increased comfort for more elderly and
diabetic people when the bottom of the insole has a loop cloth
layer instead of a hook layer as previously shown. FIG. 14a shows a
PORON.RTM. top layer and a loop-cloth layer. FIG. 14b discloses a
sandwich configuration of a hook top of a heel cup, a vinyl layer
and a loop bottom of the cup. FIG. 14c illustrates a sandwich
configuration of a hook top layer, a vinyl layer and a loop bottom
layer.
[0035] FIGS. 15a-15c illustrate construction details of a short
length heel cup embodiment comprising (a) a top view of the short
length cup with perforate holes and a large hole for heel shock and
pressure relief, (b) materials under the heel of the foot, and (c)
a longer heel cup modification.
[0036] FIG. 16 is a view of a typical perforated ramp pad useful in
the several disclosed heel cup embodiments.
[0037] FIG. 17 is a side view of a heel cup assembly with a loop
cloth on the foot facing side.
[0038] FIGS. 18a-18e depict further heel cup embodiment depicting
(a) a top view of a loop cloth on the top surface and on the walls
of the heel cup, (b) a side view of the insole with cushions
mounted thereon, (c) a top view of the insole mounted on the heel
and sidewall assembly, (d) a side view of an assembly with straps
to secure the foot in place, in which the straps can be attached to
exterior sidewalls on other side of the assembly, which is useful
as a slipper, for foot cushioning and correction in post surgical
applications, and (e) a side view where an additional cushion is
added if additional heel cushion or other cushion height is
needed.
[0039] FIGS. 19a-19e illustrate another heel cup assembly including
(a) a top view of the assembly, (b) a side view of the FIG. 19a
assembly, (c) a view similar to that shown in FIG. 19a but with
places for positioning heel, arch, metatarsal and toe grip cushions
therein, (d) ) a view similar to that shown in FIG. 19c but the
respective cushions positioned therein, and (e) a top view of the
FIG. 19d design.
[0040] FIG. 20 is a front view of an arrangement for supporting a
heel.
[0041] FIG. 21 is a view of a cushion mount insert.
[0042] FIG. 22 shows a heel grip bracket with formed edging on both
its sides to provide spring tension to maintain inward pressure
against cushion mount vertical walls.
[0043] FIG. 23 is a bottom view of FIG. 22 depicting a heel
pressure relief hole positioned within the formed edging to provide
an inward pressure of cushions against sides of heel.
[0044] FIG. 24 is side view of the cushion mount insert of FIG.
21.
[0045] FIG. 25 is a rear view of the heel of a foot cupped in a
heel grip and support arrangement.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0046] A general construction of the present invention is depicted
in FIGS. 1 and 2. A shoe 30 of conventional construction, as shown
in cross-section, includes a bottom portion 32, including heel and
toe sections 34 and 36, side portions 38, a back portion 40 and a
forward foot covering portion 42. An orthotically formed heel cup
44, which is inserted within shoe 30, is typical of one of the many
types generally encompassed by the present invention.
[0047] Reference is now made to FIGS. 3a-3c which comprise the
present invention embodied in these figures as a medium length heel
cup 50 which, in turn, is illustrated in its completed form in FIG.
3c. Heel cup 50 is formed from a prototype heel cup 50', shown in
FIGS. 3a and 3b. Prototype heel cup 50' includes a bottom portion
50'a and upstanding side and wall portions 50'b, and comprises a
cup-shaped lamination of a thin, relatively stiff plastic sheet of
vinyl 52 and a loop cloth material 54, such as of VELCRO.RTM.. A
portion of vinyl sheet 52 and loop cloth material 54 is cut away
from bottom portion 50'a, as shown in FIG. 3b, such as by die
cutting, to form a ledge or rim 56, as illustrated in FIG. 3c.
Means, such as laser cutting and water jet cutting, can be used in
place of die cutting.
[0048] Loop covered rim 56 is employed for attachment of an insole
thereto. In this embodiment, the insole is provided with a bottom
having hooks thereon for attachment to the loop material remaining
on ledge or rim 56. The resultant construction thus forms a flat
insole attached to a heel and side of foot assembly. The hook
bottom of the insole and loop covered side and back wall portions
50b of heel cup 50 are further adapted to respectively hold
loop-covered cushions and the sidewalls hook-covered cushions in
place, as is suggested in later illustrated embodiments of the
present invention (e.g., see FIGS. 5c and 5d). It is preferred that
hook coverings not be placed on cushions facing the foot to avoid
roughness of feel and irritation. It is to be understood, however,
that such hook-coverings can be used, provided that such roughness
of feel and irritation is avoided, such as by improved hook and
loop materials.
[0049] FIG. 4 is a view of a heel cup 60 which is similar to but
modified from that depicted in FIG. 3c. Here, additional ledging 62
is provided for more secure insole attachment, if needed. The
vertical wall and the mounting ledge may be formed from a loop and
plastic material lamination. To suit various styles, the ledge
outline and shape can be varied.
[0050] FIGS. 5a-5d depict several views of a short length heel cup
embodiment 70 of the present invention. This embodiment was
initially devised to meet a specific problem. A major contributor
to plantar fasciatus is the difficulty in retaining the heel
securely in shoes. Due to large variations in dimensions of feet
and dimensions inside shoes, it is quite possible for an individual
to have feet with a wider forefoot and a narrower heel than those
of generally normal dimensions and, for economical reasons, for
shoe suppliers to provide for the many special combinations
required to satisfy such unusual foot sizes. Accordingly, heel cup
70 is intended to provide such changes in sidewall thickness which
will alleviate narrow heel feet which must fit in wider width
footwear.
[0051] Accordingly, as shown in FIGS. 5a and 5b, heel cup 70 is of
relatively short length, comprising a bottom portion 72 and back
and side portions 74, that are cast from an outer sheet of vinyl
film in the range of 0.015 inches thick which is laminated to an
inner sheet of loop cloth, e.g., of VELCRO.RTM. loop cloth. Heel
cup 70 may be formed by use of a suitably shaped last for this heel
cup embodiment, in which the laminated sheet assembly is vacuum
thermo-formed and die cut. The loop cloth side is disposed to face
the heel. As depicted in FIG. 5c, to obtain cushioning that will
secure the heel of the user in the shoe, cushion strips or shaped
cushions 76 with a VELCRO.RTM. hook-back layer may be attached to
the VELCRO.RTM. loop layer on the front walls. In FIG. 5c, one
cushion strip is positioned on the back portion of heel cup 70, and
two cushion strips are attached on the respective side portions of
inside walls of the heel cup.
[0052] A lengthening of heel cup 70 may be obtained, as illustrated
in FIG. 5d, to provide an elongated heel cup embodiment, through
use of an insole 78 which has a VELCRO.RTM. hook bottom 80 attached
to VELCRO.RTM. loop bottom portion 72 of short length heel cup 70.
This combination provides for excellent heel support on the sides
of the individual's feet. The back attached cushion prevents
irritation on the back of heel due to shoe rubbing the skin as the
foot moves up and down, typically while the wearer is playing
tennis or other active sport.
[0053] It is envisioned that cushions of different thickness,
softness, shape and size may be quickly attached and detached to
obtain the right feel and protection for the user. Also, by placing
cushions on only one side of the inside walls of the cup, some
degree of pronation or supination may be possible. Other materials
may be substituted and variations in material thickness and shape
can all fit into the scope of this invention.
[0054] A further heel cup improvement utilizes a VELCRO.RTM. loop
cloth laminated to both sides of the vinyl sheet. With this
arrangement, it is possible to attach cushion pads with VELCRO.RTM.
hook cloth to the loop layer on the bottom of the heel cup. An
extra cushion under the heel may also provide relief from heel pain
for some people.
[0055] This design also enables the employment of sufficiently high
walls to cup the sides of the heels and the rigidity to stay
vertically.
[0056] FIGS. 6aand 6b depict the present invention embodied also as
a heel cup 90 having a bottom portion 92, a back wall 94 and long
side walls 96 having a low-height sidewall portion 98 which can
extend to about two-thirds the foot length to protect the sides of
the feet from irritation from stitching and any existing rough
interior walls. Bottom portion 92 is cut to form a loop covered
ledge 100. An insole with a VELCRO.RTM. hook bottom can be attached
to the loop layer on ledge 100 to provide additional sidewall
support for the individual. Cushioning strips can be placed on loop
covered extended length walls 96 to protect the sides of the
feet.
[0057] FIGS. 7a-7c show a further embodiment of the present
invention including a heel cup 110 configured with a bottom portion
112 which is fully enclosed by a side wall portion 114, a back wall
portion 116 and a front wall portion 118. Bottom portion 112
comprises and insole which is permanently attached to heel cup 110.
Both may be vacuum-formed and die cut from a laminated sheet, such
as depicted in FIG. 7b, which comprises a sandwiched composition of
a loop cloth 120, a vinyl sheet 122 and a second loop cloth 124.
Heel cup 110 may also be used as a household slipper which, as
shown in FIG. 7c, includes a cushion layer 126, a thin vinyl layer
128 and a thin layer 130 of grip material of, for example, rubber
or plastic.
[0058] FIG. 8 is a view of another heel cup embodiment 140 similar
to that illustrated in FIG. 5d, but with an insole 142 and
sidewalls 144 which may extend a full length or about one-half to
approximately two-thirds of that of the insole. For this
embodiment, the lamination portrayed in FIG. 7c may be provided
with an additional cushioning layer between the grip material and
the vinyl.
[0059] FIGS. 9a-9h depict a heel cup 150 (FIG. 9d) and its method
of formation (FIGS. 9a-9c) from a flat laminated sheet 150a which
is illustrated in FIG. 9a. Flat laminated sheet 150a comprises a
top layer 152 of a loop or hook cloth, a central layer 154 of a
soft cushion material such as PORON.RTM. which is an open cell foam
polyurethane, and a bottom layer 156 of a thin plastic or fibre
board or any material of relative stiffness which can provide a
support means for the sidewall assembly after the above layers are
adhesively or otherwise bonded together. The above-mentioned
materials represent examples of a wide variety of alternative
materials that can be used. Laminated sheet 150a is die cut or
otherwise cut to form a prototype heel cup 150b having tabs 158
lying in the same plane as the prototype heel cup. Tabs 158 are
then bent at a 90.degree. angle with loop or hook material 152a,
remaining from top layer 152, affixed thereto. Laminated sheet 150c
with its bent tabs is then curved to provide the finished product
depicted as heel cup 150.
[0060] An insole 160, as shown in FIG. 9e, is mounted atop tabs 158
of heel cup 150 to provide a rear foot heel cushioning section 162.
This embodiment is particularly useful for users having very narrow
heels which can be made additionally very secure, such as by
mounting, e.g., as shown in FIG. 9f, additional cushions 164 with a
hook area on one side to attach to the loop side of a side wall
166.
[0061] FIG. 9g is a top view of an insole 168 mounted on a longer
length sidewall cushioning assembly 170, in which several loop tabs
172 under the insole keep the sidewall 174 and the insole together
as one completely adjusted assembly which can readily be removed
and re-inserted into footwear. The sidewall strip can be one
continuous length around the insole periphery or a series of
shorted spaced apart lengths. Separate lengths can be mounted
around in the toe box area if needed. It has been demonstrated that
superb comfort has been achieved due to relief from chafing of the
skin due to the rougher feel of the inner walls, seams, stitching,
etc. which is typical of most footwear. Sidewall 174 can be removed
and periodically washed, dried and re-inserted. By the above
advantages, the cost and comfort of low cost footwear will be more
advantageous than very costly footwear.
[0062] FIG. 9h shows a side view of a sidewall 176 having
cushioning 178 mounted on tabs and ready to be inserted into the
footwear. The sidewall height is lower than the shown sidewall
height but can be shaped to help remove virtual side of foot
irritation, such as corns or bunions. The user can readily trim the
sidewall height by scissors or remove and/or replace all or
portions of the sidewall, or add additional hooks on one side
cushion where thicker cushioning is indicated. By adding and
relocating the underside of the insole, the complete assembly
becomes the ultimate in adjustability for best comfort of the
individual and his or her foot problems and differences in footwear
for all seeking different shoe profiles, heel height, sense of
feeling of fit and of styling. For people more dependent on medical
expertise, this system is a useful tool to obtain superior fitting
results and at lower cost.
[0063] FIGS. 10a-10f show a further heel cup embodiment. This
series shows an additional type attachment that has side strips of
similar plastic sheet laminated to a loop layer to provide vertical
sidewalls of loop cloth facing the sides of the mid-foot or,
additionally, the forefoot. These walls, approximately 0.5 to 1.5
inches above the top surface of the insole, provide the attachment
of cushioning pieces or strips to protect the sides of the feet
from irritation of the inside walls of the footwear. This
cushioning, when attached to the loop sidewalls of the heel cup or
the mid and forefoot loop sidewall attachments, can also be used to
pronate or supinate the position and direction of the foot with
respect to the footwear. These attachments can also be adjusted for
narrow heel shapes of feet and possibly narrower areas of mid-foot
and forefoot that are difficult to match and fit with commonly
available manufactured shoes.
[0064] Accordingly, FIG. 10a shows a side view of a sidewall strip
182 including a loop layer 184 laminated or otherwise bonded to a
plastic layer 186. Sidewall strip is bent at an end to form a
narrow shelf 188. Strip 182 is adapted to be flexible to enable it
to be curved when attached around the curving periphery of an
insole 190, as shown in FIG. 10b. Specifically, insole 190 has a
hook bottom 192 which is supported on and attached at its ends to
opposed shelves 188 on sidewall strip 182; in particular, a portion
of the insole has strips attached to the medial and outside insole
edges.
[0065] The formation of sidewall strip 182 is shown in FIG. 10c,
commencing with a flat sheet which had been die cut into a
prototype sidewall strip 182' having unbent tabs 188'. Unbent tabs
188' may be bent, as depicted in FIG. 10d, like that shown in FIG.
10a. Thus, FIG. 10d shows the forming of the FIG. 10c die cut sheet
which may be done during die cutting or later to suit production or
shipping needs. For example, if the item is shipped flat, such as
to reduce shipping costs, the tabs may be later bent by a
customer.
[0066] As an addition to the immediately preceding embodiment,
additional cushions, such as cushion 194, as depicted in FIG. 10e,
may be coupled to loop layer 184 on plastic layer 186. Also, as
illustrated in FIG. 10f, an additional cushion 196 may be mounted
on cushion 194, if thicker cushioning is needed in a certain area
of the foot. To effect this purpose, cushion 196 is provided with a
cushiony portion 198, such as of PORON.RTM. material, with a hook
side 200 thereon for attachment to an existing cushion or side
wall. It is believed that this type of construction enables
podiatrists and all other health professionals, as well as typical
consumers, to obtain optimum foot care, comfort, at minimum cost
due to all possible means of adjustment to suit all possible
conditions.
[0067] FIGS. 11a-11e depict an alternative heel cushion embodiment.
FIG. 11a is a view of strip 210 of an attachment loop and plastic
sheet lamination after die cutting with suitable holes 212 therein,
from which prototype tabs 214 are to be formed. FIG. 11b is a view
of the FIG. 11a strip after its being cut into half sections, such
as half section 216, to form a plurality of prototype tabs 218.
FIGS. 11c and 11d are views showing a 90.degree. bending of
prototype tabs 218 into bent tabs 220 on a formed strip 222. As
shown in FIG. 11e, an insole 224 is mounted on and attached to the
tabs, as evidenced by single tab 220.
[0068] FIGS. 12a-12f illustrate methods of augmented heel cup
embodiments. These additions preferably use a design which utilizes
a VELCRO.RTM. hook layer attached to the bottom surface of,
preferably, a flat layer of PORON.RTM. upon which the plantar
aspect of the feet are placed to perform as a shock absorbent,
cushioned, insole for footwear. A plastic sheet of thin but stiff
vinyl in the range of approximately 0.01 to 0.03 inches has, at
least, a VELCRO.RTM. layer bonded to one side of the plastic sheet.
The VELCRO.RTM. layer is preferably a thin loop cloth. The sheet is
then vacuum thermo-formed and then die cut to the shape described
below.
[0069] Accordingly, referring to FIG. 12a, a heel cup 230 includes
a bottom portion 232 and back and side walls 234, comprising a
lamination of an outside plastic layer 236 and an inner layer of
loop cloth 238. A hole 240 is formed in the bottom layer, and
extends entirely therethrough, as illustrated in FIGS. 12b and 12c.
As further shown in FIGS. 12c and 12f, an insole 242 is placed on
bottom portion 232 and attached thereto by mating hook cloth 244
engaging loop cloth 238. A covered cushion 246, see also FIG. 12d,
is provided with a loop top layer 248 to attach it to hook cloth
244 on insole 242 through hole 240. Cushion 246 is adapted for
possible relief of plantar fasciatus pain when the calcaneus bone
rear bottom can fit into the hole to relieve some of the pressure.
Cushion 246 may be further modified, as shown in FIG. 12e. Here, a
cushion 250 has an optionally centrally located hole 252 into which
a removable cushion disc 254 can be placed.
[0070] Modifications of the embodiments depicted in FIGS. 12c and
12d, for example, may include holes which can be rectangular or
otherwise shaped. In all the foregoing, the materials, such as
vinyl and PORON.RTM. sheets, are suggested as being exemplary of
the many other materials that may be can be substituted therefor by
using many other types of plastic sheet and cushioning materials,
utilizing the described methods of construction. Typically,
dimensions, such as diameters and material thickness, can vary
whether shoe sizes vary, or light or heavy duty footwear is used as
for dress shoe, sports use, or for ski and military type of
activities.
[0071] A further heel cup embodiment is depicted in FIGS. 13a-13c,
and comprises a heel cup 260 into and onto which an insole 262 with
a hook cloth layer 264 is secured. Heel cup 260 has an inner
surface covered with a loop cloth layer 266 to which the insole is
secured. Cushions 268 may be attached to hook cloth layer 264 on
the underside of insole 262.
[0072] FIGS. 14a-14c illustrate views of other heel cup embodiments
with various advantages in increased comfort for more elderly and
diabetic people when the bottom of the insole has a loop cloth
layer instead of a hook layer as previously shown.
[0073] FIG. 14a shows a laminate 270 having a PORON.RTM. top layer
272 and a loop-cloth layer 274. Laminate 270 provides some
advantage in increased comfort for more elderly and diabetic people
is gained when the bottom of the insole has a VELCRO.RTM. loop
cloth layer instead of hook as shown in FIG. 13a.
[0074] In FIG. 14b, a laminate 276 includes a sandwich
configuration of a hook top 278 of a heel cup, a vinyl layer 280
and a loop bottom 282. This laminate is adaptable for the FIG. 13b
embodiment.
[0075] FIG. 14c illustrates a sandwich laminate 284 of a hook top
layer 286, a vinyl layer 288 and a loop bottom layer 290. This
laminate is required for those cushions that are attached to the
bottom of the insole. After lamination of these layers, the
lamination can be die cut into all the resilient cushions
previously described.
[0076] In further embodiments, to further improve the cushion
resilience and shock absorption the cushions can be perforated in
various hole patterns either after they have been die cut or
before, when entire sheet stock rolls are perforated. It is also
advantageous to perforate the FIG. 13a laminated heel cup material
if necessary, before or after forming into a cup shape. As an
alternate, the heel cup with a loop top layer or the one in FIG.
13a above can be used with a hook bottom or loop bottom insole. For
a loop bottom insole and loop top cut a thin round washer of hook
on both sides will connect cup and insole together.
[0077] FIGS. 15a-15c illustrate construction details which improve
the functions of the heel cups to provide further insole
performance by adding die cutting a large hole in the heel area and
small perforating holes on the flat bottoms of the short and longer
length heel cups. In FIG. 15a, a short length heel cup 300
incorporates perforate hole 302 surrounding a large hole 304 for
heel shock and pressure relief.
[0078] Construction 310 shown in FIG. 15b, which is directed to
materials placeable under the heel of the foot, comprise a
PORON.RTM. layer 312 of the insole having a hook layer 314
laminated thereto, a VELCRO.RTM. loop layer 316 at the top surface
of the heel cup, a vinyl layer 318 laminated to the above loop
layer, and another VELCRO.RTM. loop layer 320 laminated to the
bottom of vinyl layer. Large hole 304 passes through the three cup
materials.
[0079] During the installation of the insole into the footwear, the
heel area of the insole is first placed on the flat bottom of the
cup. Then, the hook bottom of the insole is bonded to the loop top
flat area of the heel cup. The heel cushion is placed under the
heel cup and the hook area of the insole that is exposed by the
large hole bonds to the loop top of the heel cushion.
[0080] FIG. 15c describes a heel cup 330 which is longer than
construction 300, shown in FIG. 15a. Like the prior construction,
construction 330 includes a large hole 332, but further
incorporates additional perforations 334 and an extended heel cup
wall 336.
[0081] All previously described cushions which are attached to the
bottom of the insoles with a VELCRO.RTM. hook or loop laminated
layer can also be made from perforated material to increase
flexibility and foot comfort.
[0082] As disclosed in FIGS. 16aand 16b, it is also contemplated
that a ramp pad 340 can be utilized in the several heel cups of the
present invention. If desired, ramp pad 340 may be provided with
perforations which also function usefully in very tender areas of
the feet. Such ramp pads may be placed in post surgical areas so
that, when the pads are gradually fed into these areas, they will
provide protective lift with time.
[0083] As depicted in FIG. 17, a heel cup 350 is formed from a
molded assembly of a loop cloth 352 laminated to a semi-rigid vinyl
layer of a thin vinyl plastic film 354. The loop cloth is
positioned on the foot facing side of the heel cup. This assembly
is preferably laminated with loop cloth upon which the earlier
described insole models with a VELCRO.RTM. hook bottom can be
seated and attached to. The loop cloth covered side walls on the
foot facing side of the formed assembly can be used to attach
cushions with VELCRO.RTM. hook on the side facing the assembly heel
and foot sidewalls. Additional similar cushions can also be
attached on the bottom loop surface of the foot facing plantar
aspect of this assembly.
[0084] The versatility of cushion attachment is greatly increased
by using the bottom hook surface for attaching loop covered
cushions to the bottom of the insole, and hook covered cushions
attached to the loop surfaces of he foot facing and sidewalls of
the attachment.
[0085] FIGS. 18a-18e depict a further embodiment of a heel cup 360.
As shown in FIG. 18a, this heel cup includes a bottom portion 362
and back and side wall portions 364 covered with a loop cloth 366.
An insole 368 with hooks is secured to loop cloth 366 on bottom
portion 362. Additional heel, arch and metatarsal cushions 370, 372
and 374 (see FIGS. 18band 18c) are mounted on insole 368.
[0086] Straps 376, as shown in FIG. 18d, may be affixed to the
assemblies previously depicted to help secure the wearer's foot in
place. The assembly can be used as a slipper. It can also be used
for foot cushioning and correction in post surgical applications.
The patient can wear the slipper in bed and get out of bed to go to
wash up, eat, etc., without disturbing the bandages. The loop
bottom may assist the surgeon in separating the toes by using
bandages with VELCRO.RTM. hook dots to hold down to the loop top
surface. The patient may participate in outpatient visits wearing
such slippers.
[0087] For all these additional applications, the material
thickness and sturdiness can be modified to suit and need. As an
example for use in army type boots, ski shoes, etc., the walls can
be higher, the cushions firmer or thicker but the same principles
of my invention apply.
[0088] With respect to FIG. 18e, a heel cup 380 incorporates one or
more additional cushions 382 are added if additional heel cushion
or other cushion height is needed. For sports, such as skating, the
extra, adjustable cushioning will protect, to a great extent,
damage to the feet and ankles and reduce fatigue and pain.
[0089] FIGS. 19a-19f illustrate another heel cup assembly in which
essentially no VELCRO.RTM. hook and loop is used to achieve
relocation of cushion pads for optimum support of the feet to
minimize discomfort. This type of insole, however, has several
advantages such as lower cost, improved heel and side of feet
cushioning, and has no need of pad adjustment to achieve adequate
foot support.
[0090] FIGS. 19a and 19b show an assembly 390 fabricated from a
plastic sheet shaped to provide the bottom of the insole and
sufficient material to form the vertical walls surrounding the heel
and sidewalls of the feet using a suitable machining and heat
forming or molding process. The particular assembly shown is the
result of die cutting the plastic material prior to forming the
desired shaped part of the insole assembly. It is also possible to
form this shape out of sheet material and then to die cut the
desired part. The sheet material can be a flexible or semi-rigid
foam or non-foam polyurethane but many suitable materials can be
used.
[0091] Accordingly, assembly 390 includes a bottom portion 392, a
medial sidewall 394, a heel section wall 396, and cushioning walls
398 for the sides of the foot. Cushioning walls 398 can extend
around a greater or lesser extent of the periphery of the foot as
is needed or desired. For reduced manufacturing cost, the walls and
insole shapes for both feet can be made identical.
[0092] Referring to FIGS. 19c and 19d, the top surface of bottom
portion 392 may be embossed with recesses or slightly elevated
walls to retain foot cushions in place for assembly, such as
location 400 for a heel cushion 402, location 404 for an arch
cushion 406, location 408 for a metatarsal cushion 410 and location
412 for a toe grip cushion 414. The cushion surfaces and other
surfaces of FIG. 19c can be coated with dry powder which becomes an
adhesive bond when the final assembly is heated and pressured into
a sealed assembly, as shown in FIG. 19e.
[0093] The lower level shown in FIG. 19a can be made of a clear
plastic material which then makes it possible to view the internal
construction of the insole assembly when the insole is turned over.
The plastic material can be perforated with a fine hole pattern
which enables the moisture to escape the enclosed cavity where the
cushions are sealed in position. When the insole is in footwear and
walking or running is taking place, the cushions become compressed
with each step and the air and moisture will escape through the
fine holes. The resultant constant air movement acts to exhaust air
from the interior of the shoe and to cool the feet during vigorous
sports activity. The holes can be fine enough to prevent sand and
other particles from entering the cushion chamber area. The insoles
can be washed and dried to maintain freedom from odors and mold
formation.
[0094] The present invention thus described relates to a first type
of heel cup, which is designed to attach to the bottom side of a
hook or loop surface on an insole. FIGS. 20-25 depict a second type
of heel cup. This additional heel cup design is useful in common
types of footwear, which may or not have insoles and which can
assist in side of foot cushioning and can be readily removed,
adjusted and placed back into footwear readily. This type can be
used in the heel or vamp portions of the shoes with models of
appropriate sizes.
[0095] FIG. 20 illustrates a heel grip bracket 420 in which a
cushion mount 422 is inserted, for supporting a heel. A typical
cushion mount insert 422 is depicted in FIG. 21, and comprises a
vinyl layer 424 sandwiched between loop cloth layers 426 and 428.
Heel grip bracket 420 is further shown in FIG. 22 and includes a
base or bottom portion 422a and wall portions 422b joined by
outwardly extending edgings 430 and 432 on both its sides to
provide spring tension to maintain an inward pressure of bracket
420 against the foot of the user through its cushion mount vertical
walls. As shown in FIG. 23, a heel pressure relief hole or opening
434 may be provided within edgings 430 and 432 to provide an inward
pressure of cushions 422 against the sides of the heel. A suitable
cushion mount insert 436 is illustrated in FIG. 24. FIG. 25 is a
rear view of the heel of a foot cupped in a heel grip and support
arrangement.
[0096] The elevated side of foot and heel sidewalls can be bonded
with an outside strip approximately 1/2" wide of VELCRO.RTM. hook
or loop upon which soft cushions with a VELCRO.RTM. layer can be
attached. This exterior to the foot cushioning will customize the
fit between the footwear interior when the heel and sides of feet
are too loose in the footwear.
[0097] Despite the superior protection from shock and irritation
for the feet that the present invention will provide, the products
encompassed thereby can be produced at relatively low cost and will
benefit tired, sore, and aching feet due to the simple and
effective design.
[0098] Although the invention has been described with respect to
particular embodiments thereof, it should be realized that various
changes and modifications may be made therein without departing
from the spirit and scope of the invention.
* * * * *