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Publication numberUS3886674 A
Publication typeGrant
Publication dateJun 3, 1975
Filing dateNov 23, 1973
Priority dateNov 23, 1972
Publication numberUS 3886674 A, US 3886674A, US-A-3886674, US3886674 A, US3886674A
InventorsPavia Rafael Saurina
Original AssigneePavia Rafael Saurina
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Article of footwear
US 3886674 A
Abstract
A sole has a toe end and a heel end. A heel is located at the heel end and has one portion closer to and another portion farther from the toe end. A pivot connects the one portion with the sole so that the heel can pivot relative to the sole about a transverse axis extending parallel to the plane of the sole. One or more biasing springs are interposed between and bear upon the heel and the heel end of the sole, first to normally maintain the other portion of the heel spaced from the sole and to resiliently resist pivoting of the heel toward the sole. The opposite ends of the springs are connected to the heel and the sole, respectively.
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Description  (OCR text may contain errors)

United States Patent [191 Pavia 1 June 3, 1975 ARTICLE OF FOOTWEAR [22] Filed: Nov. 23, 1973 [21] Appl. No.: 418,495

1,014,999 6/1952 France 36/38 Primary Examiner-Alfred R. Guest Attorney, Agent, or Firm-Michael S. Striker [5 7] ABSTRACT A sole has a toe end and a heel end. A heel is located at the heel end and has one portion closer to and another portion farther from the toe end. A pivot connects the one portion with the sole so that the heel can pivot relative to the sole about a transverse axis ex tending parallel to the plane of the sole. One or more biasing springs are interposed between and bear upon the heel and the heel end of the sole, first to normally maintain the other portion of the heel spaced from the sole and to resiliently resist pivoting of the heel toward the sole. The opposite ends of the springs are connected to the heel and the sole, respectively.

7 Claims, 2 Drawing Figures ARTICLE OF FOOTWEAR BACKGROUND OF THE INVENTION The present invention relates generally to an article of footwear, and more particularly to an improved article of footwear having a spring-loaded heel.

Articles of footwear are known in a variety of types and styles which is too great to mention individually. Heretofore, however, to my knowledge articles of footwear having a spring-loaded heel have not been proposed in the art.

SUMMARY OF THE INVENTION It is, accordingly, an object of the present invention to provide such an article of footwear having a spring loaded heel.

In pursuance of this object, and of others which will become apparent hereafter, one feature of the invention resides, in an article of footwear, in a combination comprising a sole having a toe end and a heel end. A heel is located at the heel end and has one portion closer to and another portion farther from the toe end. Pivot means connects the one portion with the sole, so that the heel can pivot about a transverse axis extending parallel to the plane of the sole. Biasing means is interposed between and bears upon the heel end of the sole, so as to normally maintain the other portion spaced from the sole and to resiliently resist pivoting of the heel toward the sole. Connecting means connects the biasing means with the heel and the sole, respectively.

The advantages of the improved article of footwear are manifold. On the one hand, it provides a pleasant cushioning effect when a user walks.

Again, the novel article of footwear has been found to be an aid in preventing or at least retarding the development of varicose veins, especially in the case of pregnant wearers where the development of varicose veins is a particularly frequent and severe problem.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a vertical section through one embodiment of the invention; and

FIG. 2 is a view similar to FIG. 1, but through another embodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring firstly to FIG. 1, which illustrates an article of footwear primarily intended for men who. as a rule, are heavier and therefore require greater support, and

which article will be seen to have a sole provided with a further plate 6. A nute 3 is threaded onto this free end.

A heel is provided, having the illustrated groundengaging part and having a second part which is constituted by a plate 7 secured (as by bolting) to the groundengaging part. That portion of the heel which is closer to the toe end of the sole is bent upwardly towards the sole as indicated at 7 and formed with a hollow extending transversely of the sole and through which a pivot pin 8 extends which is secured in lugs formed as part of the lower plate 6 and projecting downwardly as shown. Of course, instead of the pivot pin 8 it would be possible to use screws or the like to pivot the heel, A strengthening plate 9 can still be inserted into the sole and the illustrated screw is used to hold this strengthening plate 9 and the front end of the plate 6 against the sole.

In this embodiment there is utilized a plurality of helical compression springs 4, of which the one at the righthand side'of FIG. 1 will be seen to have one of its end convolutions secured to the screw 2 by means of the nut 3 threaded onto the same. At the other end of the right-hand spring 4 an end convolution is secured to the heel by means of the illustrated screw 5 the head of which engages the end convolution and which screw is threaded through the plate 7 into the heel. The other springs can be similarly secured. Their number may be selected at will, and they may be readily removable so that the number of springs can be decreased or increased as desired by a user in order to obtain the maximum comfort and, possibly, also a desired level of elevation.

FIG. 2 is reminiscent of FIG. 1 and is particularly directed to a ladies shoe. Like elements are identified by like reference numerals as in FIG. 1. It will be noted that the portion 7 is bent at a somewhat more pronounced angle to obtain the desired higher heel configuration for a ladies shoe, and that only a single spring 4 is utilized in this embodiment. Of course, it is conceivable to use more than one spring if desired. It will also be noted that reference numeral 10 identifies a washer which is held by the head of the screw 3 and serves to clamp the terminal convolution of the spring 4 against the plate 6. A similar washer is used in conjunction with the screw 5.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.

While the invention has been illustrated and described as embodied in an article of footwear, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore. such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:

1. In an article of footwear, a combination comprising a sole having a toe end and a heel end; a heel located at said heel end and having one portion closer to and another portion farther from said toe end. said heel including a ground-engaging part having a surface facing said sole, and a plate part overlying said surface and having in the region of said one portion a bend extending towards said sole; pivot means connecting said bend with said sole, so that said heel can pivot about a transverse axis extending parallel to the plane of said sole; biasing means interposed between and bearing upon said heel and said heel end of said sole, so as to normally maintain said other portion spaced from said sole and to resiliently resist pivoting of the heel toward said sole: and connecting means connecting said biasing means with said heel and said sole. respectively.

2. A combination as defined in claim 1, wherein said biasing means comprises biasing spring means having end portions respectively located adjacent to said heel and said sole; and wherein said connecting means connects said end portions to said heel and said sole, re-

4 spectively.

3. A combination as defined in claim 1,'wherein said biasing means comprises biasing spring means having one portion connected with said sole, and another end portion connected with said plate part.

4. A combination as defined in claim 3, wherein said connecting means comprises screw means connecting said plate part with said ground-engaging part.

5. A combination as defined in claim 3, wherein said biasing spring means comprises a single biasing spring interposed between said sole and said other portion of I said heel.

6. A combination as defined in claim 3, wherein said biasing spring means comprises a plurality of biasing springs at least one of which is closer to and at least one other of which is farther from said pivot means.

7. A combination as defined in claim 3, wherein said biasing spring means comprises helical compression spring means.

Patent Citations
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US1088328 *Sep 3, 1912Feb 24, 1914 Sporting-shoe.
US2383877 *Oct 28, 1944Aug 28, 1945Vulcan CorpSpring wedge heel
US2555654 *Feb 23, 1950Jun 5, 1951Ostrom John WSpring heel for shoes
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4417408 *Oct 21, 1981Nov 29, 1983Metro Robert DAdjustable mechanically cushioned heel for a shoe
US4492046 *Jun 1, 1983Jan 8, 1985Ghenz KosovaRunning shoe
US4592153 *Jun 25, 1984Jun 3, 1986Jacinto Jose MariaHeel construction
US4910885 *Jan 19, 1988Mar 27, 1990Hsieh Jerry WShoe with resilient and convertible heel
US5203095 *Jun 18, 1992Apr 20, 1993Allen Don TOrthopedic stabilizer attachment and shoe
US5279051 *Jan 31, 1992Jan 18, 1994Ian WhatleyFootwear cushioning spring
US5282325 *Oct 19, 1992Feb 1, 1994Beyl Jean Joseph AlfredShoe, notably a sports shoe, which includes at least one spring set into the sole, cassette and spring for such a shoe
US5435079 *Dec 20, 1993Jul 25, 1995Gallegos; Alvaro Z.Spring athletic shoe
US5511324 *Apr 1, 1994Apr 30, 1996Smith; RooseveltShoe heel spring
US5636456 *Dec 30, 1994Jun 10, 1997Allen; Don T.Orthopedic apparatus and footwear for redistributing weight on foot
US5896679 *Jun 15, 1998Apr 27, 1999Baldwin; PhillipArticle of footwear
US5940994 *Aug 15, 1997Aug 24, 1999Allen; Don T.Orthopedic apparatus and footwear for redistributing weight on foot
US6131309 *Jun 4, 1998Oct 17, 2000Walsh; JohnShock-absorbing running shoe
US6405455May 4, 2000Jun 18, 2002John WalshShock-absorbing running shoe
US6449878Mar 10, 2000Sep 17, 2002Robert M. LydenArticle of footwear having a spring element and selectively removable components
US6457261Jan 22, 2001Oct 1, 2002Ll International Shoe Company, Inc.Shock absorbing midsole for an athletic shoe
US6901686Dec 9, 2002Jun 7, 2005Riccardo W. HayesDevices and systems for dynamic foot support
US6928756 *Mar 3, 2003Aug 16, 2005Richard HaynesJump assisting spring heel shoe
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US7219449Jun 17, 2004May 22, 2007Promdx Technology, Inc.Adaptively controlled footwear
US7334351Jun 7, 2004Feb 26, 2008Energy Management Athletics, LlcShoe apparatus with improved efficiency
US7546695Feb 25, 2005Jun 16, 2009Nike, Inc.Foot-support structures with additional shear support and products containing such support structures
US7624515May 30, 2006Dec 1, 2009Mizuno CorporationSole structure for a shoe
US7735240Jan 27, 2007Jun 15, 2010Z-Coil Ltd.Shoe sole for correcting gait
US7788824Jun 7, 2005Sep 7, 2010Energy Management Athletics, LlcShoe apparatus with improved efficiency
US7980006May 14, 2009Jul 19, 2011Nike, Inc.Foot-support structures with additional shear support and products containing such support structures
US8006408May 13, 2009Aug 30, 2011Nike, Inc.Impact-attenuating elements removably mounted in footwear or other products
US8112906Oct 27, 2008Feb 14, 2012Nike, Inc.Article of footwear with interchangeable heels
US8136265May 18, 2009Mar 20, 2012Z-Coil Ltd.Footwear sole
US20100251571 *Apr 7, 2009Oct 7, 2010Steven Paul WoodardShoe suspension system
US20110225842 *Mar 16, 2010Sep 22, 2011Lu Kuo-MingElastic Heel of The High-Heeled Shoes
US20130019502 *Dec 1, 2011Jan 24, 2013Dong-Hyuk KwonCorrecting and balancing shoes having springs
US20130160332 *Jun 15, 2010Jun 27, 2013Keun Soo YoonHigh heel shoe having foldable heel
EP0295611A2 *Jun 13, 1988Dec 21, 1988Manfred R. KuehnleTherapautic shock-absorbing shoes
EP0552994A1 *Jan 5, 1993Jul 28, 1993Beyl, SuzanneShoe, in particular a sports-shoe, comprising a spring located in the sole, enclosure and spring for such a shoe
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Classifications
U.S. Classification36/38
International ClassificationA43B21/00, A43B21/30
Cooperative ClassificationA43B21/30
European ClassificationA43B21/30