U.S. patent number 3,665,621 [Application Number 05/052,336] was granted by the patent office on 1972-05-30 for footwear.
This patent grant is currently assigned to Ernest Colombo. Invention is credited to Mario Massella.
United States Patent |
3,665,621 |
Massella |
May 30, 1972 |
FOOTWEAR
Abstract
An article of footwear having a substantially inflexible heel
supporting plate located inside the article and resiliently held
above the heel portion of the sole thereof by a base plate which is
located beneath the heel supporting plate and is secured to the
forward edge of the latter the heel supporting plate being inclined
upwardly from the forward edge thereof and the base plate being
ribbed along its length.
Inventors: |
Massella; Mario (Germiston,
ZA) |
Assignee: |
Colombo; Ernest (Berario,
Johannesburg, Transvaal Province, ZA)
|
Appl.
No.: |
05/052,336 |
Filed: |
July 6, 1970 |
Foreign Application Priority Data
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Feb 23, 1970 [ZA] |
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70/1162 |
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Current International
Class: |
A43b 021/32 () |
Field of
Search: |
;36/37,38 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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472,735 |
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Aug 1914 |
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FR |
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36,507 |
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Mar 1909 |
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OE |
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Primary Examiner: Guest; Alfred R.
Claims
What I claim as new and desired to secure by Letters Patent is:
1. An article of footwear comprising a sole having a toe portion
and a heel portion, a heel supporting plate located over the heel
portion of the sole and having a frontal edge facing towards the
toe portion thereof, a base plate located beneath the heel
supporting plate and being secured at one end thereof to the
frontal edge of the latter, the heel supporting plate being
inclined to and being resiliently movable towards the base plate,
the base plate being provided with longitudinally extending ribs
thereon, said sole comprises an outer and an inner sole and the
base plate is located between the outer and inner soles and a slot
is provided through the inner sole to enable the heel supporting
plate to extend thereabove.
2. An article of footwear as claimed in claim 1 in which the base
plate is provided with spikes at the free end thereof the spikes
being driven into the outer sole to locate the base plate.
3. An article of footwear as claimed in claim 1 in which the heel
supporting plate is made of stainless steel.
4. A heel supporting plate comprising a one-piece element defined
by generally superposed heel support and base portions joined to
each other along a fold, said base portion being narrower than said
heel support portion, a plurality of corrugations generally normal
to said fold being formed in both said heel support and base
portions for reinforcing the same, the corrugations of said heel
support portion opening in a direction away from said base portion,
at least a single additional corrugation in said heel support
portion in transverse relationship to the plurality of corrugations
thereof, and said heel support portion being dished to open away
from said base portion to conform to the shape of a person's heel.
Description
This invention relates to shoes, boots and the like which, in this
specification, are commonly termed shoes.
It has been proposed that in order to make a shoe more comfortable
a resiliently mounted heel supporting plate be located over the
heel portion of a shoe thereby providing means for absorbing
mechanical shocks which would normally be transmitted to the heel
of a person wearing such a shoe.
However, applicants believe that the reason why shoes fitted with
such plates are not commercially available at present is either
that the plates are uneconomical to manufacture or that they have
not had the desired lasting and resilient qualities.
It is accordingly the object of this invention to provide a heel
supporting plate for a shoe which will be inexpensive to
manufacture and which will exhibit good lasting qualities.
In accordance with this invention there is provided an article of
footwear comprising a sole having a toe portion and a heel portion,
a heel supporting plate located over the heel portion of the sole
and having a frontal edge facing towards the toe portion thereof, a
base plate located beneath the heel supporting plate and being
secured at one end thereof to the frontal edge of the latter, the
heel supporting plate being inclined to and being resiliently
movable towards the base plate and the base plate being provided
with longitudinally extending ribs thereon.
Further features of the invention provide for the heel supporting
plate and the base plate to be made from a single piece of material
bent along the frontal edge, for the ribs on the base plate to be
constituted by longitudinal corrugations formed therein, for the
heel supporting plate to have a transverse rib on the underside
thereof near the frontal edge, this rib being arranged to engage
the base plate upon downward movement of the heel supporting plate,
for the heel supporting plate to have longitudinally extending ribs
rearwardly of the transverse rib and for the plates to be made of
stainless steel.
Still further features of the invention will become apparent from
the following description of a preferred embodiment thereof,
reference being made to the accompanying drawings in which:
FIG. 1 is an isometric view of the heel supporting plate and base
plate;
FIG. 2 is a sectional isometric view similar to FIG. 1;
FIG. 3 is a side view of the heel supporting plate and base
plate;
FIG. 4 is a section taken along line A--A in FIG. 3; and
FIG. 5 is a longitudinal section of a shoe having the heel
supporting plate located therein.
In this embodiment of the invention the heel supporting plate 1 is
made of a high quality resilient steel, preferably stainless steel
and is made to a slightly dished shape to conform roughly to the
shape of a person'heel. This plate 1 is made integral with a base
plate 2 therefor which is connected to the plate along an edge 3
thereof which will be the front edge of the heel supporting plate
in use. The base plate 2 is appreciably narrower than the heel
supporting plate and is ribbed longitudinally as indicated by
numeral 4 to prevent it bending excessively during use, these ribs
being formed by corrugating the base plate along the length
thereof.
The heel supporting plate is also ribbed with one transverse rib 5
on the underside of the plate and located near the front edge 3 and
a plurality of longitudinal ribs 6 extending rearwardly from the
transverse rib 5. These longitudinal ribs 6 are made sufficiently
long and are arranged such that bending of the heel supporting
plate rearwardly of the transverse rib is minimized.
Conveniently these ribs are formed by pressing grooves into the top
face of the heel supporting plate. Thus the corrugations on the
base plate rib on the heel supporting plate and shaping of the
latter may all be effected in a single pressing operation carried
out on a flat piece of steel cut to the desired shape. This pressed
piece of steel is then simply bent about the front edge 3 such that
the heel supporting plate is inclined at a desired angle to the
base plate for example from 10.degree. to 15.degree..
The above arrangement is such that when the heel supporting plate
is depressed towards the base plate the transverse rib engages the
tops of corrugations on the base plate nd further movement of the
heel supporting plate in this direction is subject to considerable
resistance owing to the corrugations, longitudinal ribs and small
distance between the transverse rib and the front edge 3 of the
heel supporting plate. The heel supporting plate may this only be
fully depressed when the full weight of a person or a large
proportion thereof is exerted thereon. It has been found that with
the above-described plate assembly good resilience of the heel
supporting plate is achieved as well as long life of the plate
assembly.
The above-described plate and base assembly is preferably
incorporated into a shoe 7 during the manufacture thereof with the
base plate 2 located above the heel 8 of the shoe and between the
inner and outer soles 9 and 10 respectively, the edge 3 connecting
the base plate and heel supporting plate being located just
rearwardly of the front edge of the heel. Also the portion 11
forming the connection between the two plates is of the same width
as the base and extends through a slot 12 in the inner sole of the
shoe.
Thus, the plate, when it is in position, is located over the heel
of the shoe and is inclined upwardly and rearwardly from the front
edge thereof.
It may be found, depending on the structure of the shoe, that with
the base located as above described, no additional securing thereof
to the soles of the shoe is required, but if necessary the base may
be secured to the shoe by any convenient means such as nails or
adhesive. In particular, it has been found advantageous to provide
spikes 13 formed by bending small portions 14 of the base adjacent
the rear end 15 thereof downwardly, these spikes being forced into
the outer sole during assembly of the shoe. Finally, the shoe may
be provided with an inner lining (not shown) covering the heel
supporting plate and inner sole of the shoe.
In use the plate provides a comfortable and resilient support for
the heel of a person wearing the shoe thereby providing greater
comfort to the wearer by absorbing mechanical shocks generally
transmitted to the person's heel.
* * * * *