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Publication numberUS2508318 A
Publication typeGrant
Publication date16 May 1950
Filing date31 Jan 1949
Priority date23 Dec 1948
Publication numberUS 2508318 A, US 2508318A, US-A-2508318, US2508318 A, US2508318A
InventorsGeorge Wallach
Original AssigneeGeorge Wallach
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Resilient heel for shoes
US 2508318 A
Images(1)
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Description  (OCR text may contain errors)

May 16, 1950 s. WALLACH RESILIENT HEEL FOR SHOES Filed Jan. 3]., 1949 N0 PRESSURE F34 I? T PPESSU/Pf FULL PRESSURE.

INVENTOR GEORGE WALLACH @W.

Patented May 16, 1956 RESILIENT HEEL FOR SHOES George Wallach, Chapman Camp, British Columbia, Canada Application January 31, 1949, Serial No. 73,765 In Canada December 23, 1948 1 Claim. 1

- The invention relates to a resilient heel for a shoe and is concerned with a heel structure in which a leaf spring is used to provide resilience.

Prior to the invention, the full amount of available resilience in a lea-f spring used to mount the tread surface of a heel structure has not been available to the wearer during the total time that the heel is in contact with the ground or other walking surface. This was because the heel was provided with a conventional flat tread surface which caused maximum leverage of the spring to occur at the beginning of a step when the rear corner of the heel contacted the ground and then suddenly, during completion of the step, as the fiat tread surface came into full contact with the ground, the flat tread surface caused the leverage to be reduced to practically zero so that the heel had no resilience during the remainder of the step.

According to the invention a heel structure is provided in which resilience is available to the wearer both at the beginning of the step and during its completion. The invention provides a heel structure having a leaf type spring to which is attached a curved tread surface extending from the rear of the heel and covering an area which is substantially to the rear of the section of the spring providin resilience. The tread surface of the heel is curved convexly from the rear to the front of the tread surface.

In the preferred form of a heel according to the invention, the leaf spring is formed with a middle resilient section sharply bent at a contained angle of less than 90 from the section which is anchored to the shoe, and the middle section is curved downwardly from the sharp bend until it adjoins the lower section to which the tread surface is attached. It is desirable that a resilient stop block be provided so that when the heel is being used on rough ground the flexing of the spring will be limited to an amount slightly greater than that which occurs during average use of the heel.

In taking a step with a heel according to the invention, the wearer applies pressure to the spring at its rearmost point and then, due to the curvature of the tread surface, the pressure is gradually and progressively transferred in a forward direction along the leaf spring so that the increased weight being applied to the heel is resiliently absorbed by the spring without any jarring to the wearer. Limitation of the area of the tread surface provides the important advantage that the heel is still resilient after full weight of the wearer is applied to it and has the further 5 advantage that the heel can provide a springlike action to the shoe as the weight is being transferred to the other foot for the next step.

The invention will be further described by reference to the attached drawings which illustrate certain embodiments of it, and in which Fig. 1 is a side elevation of part of a shoe showing in section a heel according to the invention,

Fig. 2 is a plan view of the heel shown in Figure 1,

Fig. 3 is a diagrammatic view showing a heel according to the invention during normal use as it makes initial contact with the ground without any substantial amount of pressure yet applied to the shoe,

Fig. 4 is a diagrammatic view similar to that in Figure 3 except that part pressure is being applied to the shoe, and

Fig. 5 is a diagrammatic view similar to Figure 3 except that full pressure is being applied to the shoe.

As shown in Figures 1 and 2, a heel according to the invention may comprise a leaf spring l0 having an upper section I I which is anchored to a shoe I2 by screws I3 and nuts I4 which fasten the upper part II to an anchor plate I5 which is above the sole l6 of the shoe l2. The leaf spring H! has a lower section I! spaced from the upper section I l and resiliently held by a curved middle section l8.

A rubber tread I9 is cemented to the under surface of the lower section l1 and extends about the middle section [8. The tread l9 has a convexly curved tread surface 20 which extends from the rear of the heel to a line 2| which is substantially behind the middle section I8, and at which line the thickness of the tread I9 is reduced so that its surface 22 from the line 2| to the front of the heel does not normally contact the ground or walking surface 24.

In elevation, the leaf spring Ill has the shape of a runner of a sleigh with the middle section l8 bent sharply away from the upper section II and curving downwardly and rearwardly until it adjoins the lower section II. The contained angle between the direction in which the middle section 18 adjoins the upper section II is less than so that the middle section is resilient to forces applied against the lower section H.

A stop block 23 is cemented to the underside of the upper section II at the rear of the heel and extends toward the lower section I! an amount which is so determined that the block 23 will act as a stop to the lower section I! when the lower section is pressed upwardly an amount greater than that which occurs during average use of the shoe [2. The space between the bottom of the block 23 and the lower section I! provides for upward movement of the lower section I! during normal walking.

Figures 3, 4 and 5 of the drawings illustrate three successive stages in the taking of a normal step with the shoe l2 and respectively illustrate,

the conditions of y no pressure, part pressure and full pressure on the shoe I2. In Figure the rearmost corner of the heel is making contact with the ground surface 24 and the sole lfivhas not yet reached the surface 24. The tread surface 20 curves upwardly away from ithezsurface 24 and the contact between the surface 2'4van'd the heel is at the rear only of the tread surface 20.

In Figure 4, part of the weight of the wearer has been transferred to the shoe [2, but the sole [6 is not yet in contactfiwith the surface 24. Due

to the pressure appliedztoetheheel the leaf sprin -ljfithas been forcediupwarclly andthereis aeconsiderableiportion of ithe;tread surface :2Q@in,con

tact-with theg-roundsurface 24 so that the lever s-ar m acting on .=the resilient. section 1.8 ,of ,the leaf spring iii is considerably reduced from that of the vno pressure conditionras shown in @Figure 3.

Thisireduetion in thei n th of the eve arm has taken -.;-p1a. e adua y dueothe c rvatur of the tread surface 20 and by the length of -..t.-h ve am bein reduced the ,r e n 0f ethe spr n 9 is g a a l ad u t a e rdine to the we be n ap i d t the h e 1 2- reduced so that an increase in pressure on the heel due to an unevenness in the walking surface 2 would cause the lower section I! to come into contact with the stop block 23 to prevent damage to the spring l6. However, since the tread surface 20 does not extend beneath the resilient section IS, the heel is still resilient although full ;pressure is "being applied to the shoe l2.

As pressure is removed from the heel during .the transfer of weight from one foot to the other when taking a further step, the leaf spring l0 urges the rear of the shoe upward and forward utilizing,the stored energy in the spring to gently impel the walker forward thereby reducing the fatigue of walking.

What} claim as my invention is:

A heel for a shoe comprising a plate of spring material of substantially the same width as the heel, said plate beingfclded latitudinally upon itself form .an upper section adapted to be anchored to ta t shoe and :a lower section :spaced REEEBQENCES CITED The following references are of record-in the file of this patent:

UNITED STATES PATENTS Number Name Date 357,062 Buch V Y V -Y Feb. 1, 1887 2,e47,603 Snyder .7. Aug. 24, 194B

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US357062 *1 Feb 1887 Spring-heel for boots or shoes
US2447603 *27 Sep 194624 Aug 1948Snyder Ballard FShoe
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2548308 *6 Jan 195010 Apr 1951Hensley Charles WSpring heel construction
US3044191 *2 Apr 195917 Jul 1962Cayo Alven ASpringable shoe heel and attaching means
US3945136 *10 Feb 197523 Mar 1976Koo Bonny BSpring lift for shoes
US4417408 *21 Oct 198129 Nov 1983Metro Robert DAdjustable mechanically cushioned heel for a shoe
US4492046 *1 Jun 19838 Jan 1985Ghenz KosovaRunning shoe
US4638575 *13 Jan 198627 Jan 1987Illustrato Vito JSpring heel for shoe and the like
US4771554 *17 Apr 198720 Sep 1988Foot-Joy, Inc.Heel shoe construction
US4910885 *19 Jan 198827 Mar 1990Hsieh Jerry WShoe with resilient and convertible heel
US5138776 *26 Dec 199018 Aug 1992Shalom LevinSports shoe
US5159767 *12 Aug 19913 Nov 1992Allen Don TOrthopedic stabilizer attachment
US5203095 *18 Jun 199220 Apr 1993Allen Don TOrthopedic stabilizer attachment and shoe
US5279051 *31 Jan 199218 Jan 1994Ian WhatleyFootwear cushioning spring
US5381608 *5 Jul 199017 Jan 1995L.A. Gear, Inc.Shoe heel spring and stabilizer
US5396718 *9 Aug 199314 Mar 1995Schuler; Lawrence J.Adjustable internal energy return system for shoes
US5435079 *20 Dec 199325 Jul 1995Gallegos; Alvaro Z.Spring athletic shoe
US5617651 *16 May 19958 Apr 1997Heil- Und Hilfsmittel Vertriebs GmbhForefoot relieving shoe, more particularly for postoperative treatment
US5636456 *30 Dec 199410 Jun 1997Allen; Don T.Orthopedic apparatus and footwear for redistributing weight on foot
US5940994 *15 Aug 199724 Aug 1999Allen; Don T.Orthopedic apparatus and footwear for redistributing weight on foot
US6449878 *10 Mar 200017 Sep 2002Robert M. LydenArticle of footwear having a spring element and selectively removable components
US660104217 May 200029 Jul 2003Robert M. LydenCustomized article of footwear and method of conducting retail and internet business
US6662471 *18 Oct 199916 Dec 2003Akeva, L.L.C.Athletic shoe with improved heel structure
US696200930 Jun 20048 Nov 2005Akeva L.L.C.Bottom surface configuration for athletic shoe
US696612930 Jun 200422 Nov 2005Akeva L.L.C.Cushioning for athletic shoe
US696613030 Jun 200422 Nov 2005Akeva L.L.C.Plate for athletic shoe
US696863530 Jun 200429 Nov 2005Akeva L.L.C.Athletic shoe bottom
US699692330 Jun 200414 Feb 2006Akeva L.L.C.Shock absorbing athletic shoe
US699692430 Jun 200414 Feb 2006Akeva L.L.C.Rear sole structure for athletic shoe
US701686721 May 200221 Mar 2006Lyden Robert MMethod of conducting business including making and selling a custom article of footwear
US704004030 Jun 20049 May 2006Akeva L.L.C.Midsole for athletic shoe
US704004130 Jun 20049 May 2006Akeva L.L.C.Athletic shoe with plate
US704385730 Jun 200416 May 2006Akeva L.L.C.Athletic shoe having cushioning
US706967130 Jun 20044 Jul 2006Akeva L.L.C.Arch bridge for athletic shoe
US707689230 Jun 200418 Jul 2006Akeva L.L.C.Shock absorbent athletic shoe
US70827003 Aug 20051 Aug 2006Akeva L.L.C.Athletic shoe with inclined wall configuration
US70896893 Aug 200515 Aug 2006Akeva L.L.C.Athletic shoe with inclined wall configuration and non-ground-engaging member
US710723524 Oct 200212 Sep 2006Lyden Robert MMethod of conducting business including making and selling a custom article of footwear
US711426928 May 20033 Oct 2006Akeva L.L.C.Athletic shoe with improved sole
US712783511 Dec 200331 Oct 2006Akeva L.L.C.Athletic shoe with improved heel structure
US71558433 Aug 20052 Jan 2007Akeva, L.L.C.Athletic shoe with visible arch bridge
US738035030 Jun 20043 Jun 2008Akeva L.L.C.Athletic shoe with bottom opening
US753680928 Dec 200626 May 2009Akeva L.L.C.Athletic shoe with visible arch bridge
US754009930 Jun 20042 Jun 2009Akeva L.L.C.Heel support for athletic shoe
US759688812 Dec 20086 Oct 2009Akeva L.L.C.Shoe with flexible plate
US8539697 *7 Oct 201124 Sep 2013Tbl Licensing LlcSuspension heel
US20110225842 *16 Mar 201022 Sep 2011Lu Kuo-MingElastic Heel of The High-Heeled Shoes
US20110314705 *23 Jun 201029 Dec 2011Lu Kuo-MingElastic shoe heel structure of a shoe
US20120085002 *7 Oct 201112 Apr 2012TBL Licensing LLC, a Delaware limited liability companySuspension heel
US20120192456 *2 Feb 20122 Aug 2012Scolari Nathan AShoe With Resilient Heel
Classifications
U.S. Classification36/38
International ClassificationA43B21/30, A43B21/00
Cooperative ClassificationA43B21/30
European ClassificationA43B21/30