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Патент USA US3045375

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July 24, 1962
Filed Sept. l2, 1960
United States Patent Office I
3,045,365¢l .lilly 24, 1962
FIG. 10 is a section on the line 10-10 of FIG. 9;
FIG. 11 is a vertical section taken on the »line 11--11
George H. Bingham, Jr., Westminster, Md., assignor to
Cambridge Rubber Company, Taneytown, Md., a cor~
poration of Maryland
of FIG. l0;
FIG. l2 is a view similar to FIG. l1 illustrating a `
further modification; and
FIG. 13 is a side elevation, with parts in section, illus
Filed Sept. 12, 1960, Ser. No. 55,443
2 Claims. (Cl. 36-7.3)
trating a still further embodiment vof the present inven
Referring to the drawings and particularly to FIG. 3,
This invention pertains to footwear, especially to 'water
proof overshoes or the like, including those having fabric, 10 there is shown an overshoe S having an upper U, the sole
rubber or plastic uppers, and to an improved construc~
tion `designed to prolong the useful Ilife of the overshoe,
particularly as respects its heel portion.
Within the past few years shoe Stylists have decreed
that high- French heels for women’s shoes shall taper 15
downwardly to a tread portion of very small area, for
example, of the order of one square centimeter, such eX
treme heels being commonly referred to as “spike heels.”
Because the wear »is concentrated on this small area,
the leather “top lift” wears very rapidly and in order
to prolong the wear of such a heel it has become cus
„ G and a heel H, the latter being hollow for the recep
tion of a high heel IF, such as a French heel, and form
ing part of a shoe with which the overshoe is to be
worn. The heel F is shown in FIG. 3 in Ibroken lines
and terminates ina steel tip or top llift T.
The protective devices of the presentinvention are
designed to be placed within the hollow heel H of the
overshoe and to protect said heel from damage by the
heel of the shoe with -which the overshoe is worn. The
20 devices are of a hollow, shell-like structure, desirably
unitary and Iformed, .for example, by a ‘molding opera~
tion. While other materials may be employed, it is pre
tomary to employ a steel top lift. Since, at each step,
»ferred to employ a synthetic plastic of a type which, when
the shoe heel momentarily bears almost the entire weight
fully cured, is hard, tough, resiliently shape-retaining, and
of the wearer of the shoe, the resultant unit downward
force with which such a metallic top lift strikes the ground 25 wear-resistant. Such plastics are 'commercially available
and may be obtained from plastic manufacturers upon
is extremely high. The result is that when a shoe, hav
ing such heels, is worn with an overshoe, the area of the
As illustrated in the embodiment of FIGS. 1 and 2,
heel of the overshoe, which is contacted by the steel heel
protector P comprises a peripheral wall 2t), a bottom or
lift, is worn very rapidly and soon actually penetrated.
Moreover, if a shoe having such a heel be worn in an 30 tread portion 21, and a shoulder 22 around the interior
periphery of tread portion 21. Shoulder 22, together
overshoe ‘designed to` receive a wider heel, the heel of
with the interior surface of tread portion 21, defines a
the shoe may slip sidewise during walking until it ac
cavity 23 adapted to receive the tip of a French heel F,
tually penetrates the side wall of the overshoe. Because
including its lower peripheral wall, and has a substantially
of this extremely rapid destruction of the overshoe as a
useful article, wearers often believe that this is a result 35 ñat upper sunface 24. The peripheral wall 2l) is pro
vided with upstanding, inwardly projecting ribs 25 and
of faulty construction of the overshoe and call upon
horizontal exterior ribs l26. Ribs 26 are optional but are
the overshoe manufacturer to make a refund, and this
preferred to aid in frictionally retaining the protector P
practice has become so general that the overshoe man
within the hollow overshoe heel H.
ufacturers have suffered very substantial losses.
Tread portion 2l of protector P serves to protect
The primary object of the present invention is to» pro
vide means for protecting the heel of a yconventional over
the bottom or tread portion of overshoe heel H from
puncture. However it has been found that heel 1F not
shoe or the like from the rapid wear or puncture oc-casioned by a shoe heel having a very small tread sur
face or top lift, such as that of the so-called “spike heel.”
` only tends to wear through such tread portion but also
has a marked tendency to cut through the side walls
Further objects include the provision of protective means,
of overshoe heel H, especially where the heel H is larger
than the s-hoe heel F. Accordingly, the greater pe
ripheral thickness of material provided by shoulder 22
not only for the bottom of the heel of the overshoe, but
also for the lateral walls at its heel portion; to provide
a device -which may be independent of the overshoe with
of protector P serves to protect `such heel side walls from
wear »and puncture. 4Since shoulder 22 has a substan
which it is associated in-use, so that no modification of
the overshoe or its manufacture is required; and to pro 50 tially liat upper surface 24, the shoulder serves an addi
tional function in providing a support area for the heel
vide a protective device which is so designed as to fa
of another or second shoe having a langer heel tread
cilitate wearing of the overshoe with different shoes hav
surface and a shorter length. Interior ribs 25 terminate
ing varying height and «sizes of heel. `Other and further
at surface 24 and provide additional peripheral support
objects and advantages of the invention wil-l be pointed
out in the following more detailed description and by 55 to prevent the heel Vof the second shoe from puncturing
the side walls of protector P and overshoe heel H above
reference to the accompanying drawings wherein:
the sur-face 24. `Accordingly, protector P serves not only
FIG. l is a plan view of one embodiment of the pres
to protect the heel of Vovershoe H from wear Vand punc
ent invention;
ture', but adapts an overshoe ttor wear by shoes of differ
FIG. 2 is a section taken on the line 2_2 of FIG. l;
‘ '
FIG. V3 is a side elevation, to reduced scale and with 60 ent heel styles.
In the preferred embodiment illustrated in FIGS. 1 and
parts in section, illustrating the disposition of the em
2, peripheral wall 20 and shoulder 22 extend across .the
bodiment of FIGS. 1 and 2 lwithin the heel of an over
front or breast area of the protector. However, it has
been found that there is very little tendency for shoe
FIG. 4 is a plan View of a second embodiment of the
present invention;
- 65 heels to wear through the overshoe at the front portion
of the heel. Consequently, such front portions of the
FIG. 5 is a section on the line 5_5 of FIG. 4;
wall 20 or of the shoulder 22, or both, can be omitted,
FIG. 6 is a plan view of a third embodiment;
FIG. 7 is a- section taken on the line ’7e-«7 of FIG. 6;
if desired, as illustrated in the embodiments shown in
.FIGS 4 and 13.
FIG. 8 is a section of the embodiment illustrated in
FIGS. 6 and 7 taken in t-he plane of the line 8_5 of 70 While the protector P is so designed that it constitutes
FIG. 7;
a separate article of manufacture and sale, for insertion
FIG. 9 is a side elevation of a fourth embodiment;
by the manufacturer, distributor or user within the heel
of an otherwise conventional overshoe, the protector can
be inserted within the overshoe during its manufacture,
upper surface of a wear-resistant insert 32 contained with
if desired, so as to constitute a part of the finished over
in a recess 27d just above bottom portion 21d so as to
provide a recess 29d adapted to receive the lowerrnost pe
shoe. ‘For example, when the overshoe S is made of
ripheral edge of tie top lift T.
plastic by the conventional slush molding technique, the
In all of the embodiments illustrated, the outer sur
face of the protector is designed to be of a shape and
size to conform closely to and to fit snugly within the
interior of the heel H and the bottom surface of the
protector P may be inserted within the hollow shell of
the heel after the layer of plastic has been gelled on
the wall of the mold and excess plastic removed, and
before the boot is Ifused. Fusion will thereafter bond
the protector to the overshoe.
The modified protector P2 illustrated in FIGS. 4 and 5
has a peripheral wall 20a which extends around the rear
and side walls of the device, and hence protects the side
and rear walls of heel H, but does not extend across the
front. Similarly, shoulder 22a extends around the rear
`and side walls only of protector P2. As also illustrated
in FIGS. 4 and 5, interior ribs 2S and exterior ribs 26
protector is designed to rest upon the bottom of a heel
of the overshoe.
The protective device of the present invention can be
made relatively cheaply in mass production for utilization
by the manufacturers of «footwear or for direct distribu
tion to the user thereof.
While as above noted, it is
contemplated that plastic material will ordinarily be
used in making these protective devices, it is contemplated
that they may be made, if desired, of metal, for example
can be omitted if desired.
aluminum, or molded from fibrous material suitably
As illustrated in FIGS. 6-8, applicant’s invention com
bonded together and it is to Ibe understood that such
prises a third modification lP3 wherein shoulder 22 is 20 modifications are to be considered as within the scope
omitted. In this embodiment, the shoulder is omitted
of the invention as defined in the appended claims. It
and the peripheral wall 2Gb extends completely around
should be further understood that the foregoing descrip
the device and terminates in a lower wall 2lb which
tion is for the purpose of illustration and that the in
serves as a protective tread portion. Vertical ribs 2Sb
vention includes all modifications falling within the scope
extend around the interior of wall 2011 to restrain the
of the appended claims.
circumferential edge of heel top lift T and thereby protect
I claim:
the side walls of the heel H from puncture.
1. A protector for use in an overshoe worn with a
A fourth embodiment of the protector, particularly
adapted for fabrication from sheet plastic by vacuum
shoe whose heel has a top lift of such size and material
that it tends to damage the heel portion of an overshoe,
forming, is shown in FIGS. 9-11. Protector P4 com 30 said protector comprising a hollow shell whose outer sur
prises a peripheral wall 20c and a lbottom 21e of substan
'face is of a shape and size to conform closely with at
tially uniform thickness. The lower portion of wall 20c,
least the lower portion of the rear and sides of the heel
adjacent bottom 21e, is undercut or recessed to provide
portion of the overshoe when installed therein, and
a cavity 27, the upper plane thereof being defined by in
which includes a tread portion of wear-resistant mate
wardly projecting edge 27a. Cavity 27 contains an
rial designed to rest upon the bottom of the heel of the
insert 28 of hard, wear-resistant material, for example, a
overshoe, the interior of the shell having a shoulder of
suitably compounded vinyl plastisol applied as a liquid
material projecting upwardly around at least the side
and hardened in situ, which supports the bottom surface
and rear edges of said tread portion, said shoulder having
of top lift T. Wall 20c is provided with a series of
a substantially vertical inner surface and a flat top adapt?
vertical ribs 25e, formed as corrugations in the mate 40 ed to support the heel of a second shoe having a heel
rial of wall 20c, which terminate at edge 27a. Prefer
base of greater area.
ably, the upper surface of insert 28 is located somewhat
2. A protector according to claim 1 wherein said
below edge 27a so as to provide a horizontal recess 29
shell has interior lribs disposed about at least its rear
around the rear »and side wall of the protector. Recess
and side wall and which terminate at said shoulder, the
29 provides space to receive the lower edge of top lift 45 top of said shoulder being substantially wider than said
T without contact with wall 20c, ribs 25C and edge 27a
ribs so as to provide sufficient surface to support the
contacting the heel somewhat above its bottom edge to
heel of said second shoe.
limit »its lateral movement.
References Cited in the file of this patent
In FIG. 12, a slight modification of protector P4 is
illustrated wherein the wear-resistant insert 28a fills only 50
the lower portion of recess 27, the upper portion above
Glidden __________ ____ Apr. 15, 1913
tread material 28a being lilled with a second horseshoe
Grosky _____________ __ July 28, 1914
shaped insert 30 of Wear-resistant material forming a
Gross _______________ __ Dec. 1, 1914
shoulder 22e similar to shoulder 22.
Wilkinson __________ __ Feb. 15, 1938
A final embodiment P5 of the protector is illustrated 55 2,108,572
Richards ____________ __ Jan. 3, 1939
in FIG. 13 again adapted for manufacture from sheet
Lea _________________ __ Oct. l, 1946
material and comprising a peripheral wall 20d around
Slade _______________ __ July 26, 1960
`the rear and side portions of the protector and terminat
Loewengart __________ __ Ian. 3, 1961
ing in a bottom portion 21d. Wall 20d is provided with
a -series of horizontal, inwardly projecting corrugations 60
or ribs 31 Iwhich serve to contact heel F above its extreme
lower tip to permit the latter from puncturing Wall 20d
Brown ______________ __ Apr. 4, 1961
or heel H.
France ______________ __ May 9, 1960
The lowermost rib 31 is spaced above the
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