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Publication numberUS2206860 A
Publication typeGrant
Publication dateJul 9, 1940
Filing dateNov 30, 1937
Priority dateNov 30, 1937
Publication numberUS 2206860 A, US 2206860A, US-A-2206860, US2206860 A, US2206860A
InventorsSperry Paul A
Original AssigneeSperry Paul A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Shoe
US 2206860 A
Images(1)
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Description  (OCR text may contain errors)

P. A. SPERRY July 9, 1940.-

Filed Nbv. so, 1957 lll/11111111 11111111111lllllllllllllllllllt" INVENTOR. /Jafa/ 5228, fr?? A TTORNEYS.

Patented July 9, 1940 UNITED STATES PATENT ori-"1ct:

4 Claims.

This invention relates to footwear; and has for one of its objects the provision of a non-slipping tread surface for the footwear which will be effective and provide anti-slipping properties particularly on wet surfaces upon which surfaces the usual footwear will slip.

Another object of the invention is the provision of a sole for footwear which will enable the sole to be readily and securely attached to the upper by stitching, cementing or the like.

Another object of the invention is the provision of a plurality of single cuts extending generally across the shoe but which will follow a path to prevent slipping by reason of force being applied in different directions without the necessity of forming separate cuts or slits in different directions to resist slipping pressure in different directions.

Another object of the invention is the pro--` vision of sections in contact when in normal position but which will flex to expose the corners of the sections upon a tendency to slip when pressure is applied to the shoe. v

Another object of the invention is the provision of slits or cuts in the shoe sole which will extend transversely across the same and termi.

nate ina groove or recess which will be spaced inwardly from the edge of the shoe.

Another object of the invention is the provision of a groove or recess located inwardly from the edge of the shoe providing an uncut marginal edge and separating the uncut marginal edge from the slit or cut portion of the sole.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a perspective view of the shoe;

Fig. 2 is a bottom plan view of the sole of the shoe;

Fig. 3 is a section on line 3-'-3 of Fig. l;

Fig. 4 is a sectionalv View showing the soleV alone detached from the upper;

Fig. 5 is a modified sectional view showing aA reinforcing strip of canvas in the shoe sole.

It is a frequent happening for slipping to occur on smooth surfaces such as stairways, Iloors, public walks, stone or other pavings, or upon the decks of boats, particularly when these surfaces are wet, and the person walking over the surfaces has on a rubber sole,` especially when this rubber sole is smooth and there occurs a film of water between the sole and the surface which is not squeezed out by the pressure of the foot; and it is found that on the wet deck of a boat when the same is in motion that great danger occurs to the person walking thereon with rubber footwear, which is usual on boats, in order that the scratching of the finished surfaces may not occur. I provide an anti-slipping construction for the sole of the shoe, and at the same time I also provide improved cushioning qualities. The slits which I provide form a multiplicity of narrow sections extending in wavy lines across the shoe which increase the flexibility of the sole, especially when under pressure tending to cause the shoe to slip whereby the section corners tilt upwardly andwipe the surface upon which the .shoe rests dry to, give it'a firm and secure grip upon this dry surface and thus prevent any relative movement of the shoe and surface when the pressures of walking with a tendency to slip is provided; and I have formed a groove spaced inwardly from the outer edge of. the shoe dividing `the cut and uncut portions of the shoeand affording greater flexibility of the wavy sections by reason of this arrangement; and also by means of this groove stitching is housed in a position where it will not contact the the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished:-

With reference to the drawing, I designates the shoe upper to which a sole I I of some elastic material, such as rubber or imitation rubber is \applied, the sole here illustrated being that which is stitched to the welt or upper by means of stitchings I2 extending through the welt portion I3 and the sole II.

This sole II has a groove or recess I4 located inwardly from its edge I and following the edge about its contour to provide a convenient location in which the stitchings I2 are located for attachment to the welt. The marginal edge I6 of the sole llocated between the groove I4 and the edge I5 is plain or uncut, while the tread surface properI I1 is cut with wavy lines I8 extending generally transversely across the sole, all of which are parallel and evenly spaced. These cuts extend from the groove I4 on one side of the shoe to the groove I4 at the other side of the shoe in the sole.

The material of which this sole is made is of a very flexible character, it being of soft cushion rubber, sometimes known as gum rubber, which at the time that the cuts are made is partially cured and has the following characteristics according to the specifications of the American Society of Testing Materials: When a preliminary load of ve pounds is placed upon an anvil of five-eighths of an inch diameter for ten seconds followed by the placing of a three pound weight upon va ball of three thirty-seconds of an inch in diameter for an equal period of ten seconds the depression into the rubber of the penetrating ball is .125 inch upon the uncut portions I6, whereas, when the same tests are applied to 20 surface walked on to thereby become worn; and

uncut depth i9.

the cut arca the penetration is .127 inch. In taking a series of tests at different locations it is found that the several readings in the uncut area varied only in .O04 thousand, whereas the variation in the cut"v area varied more, such for instance as up to .O inch, this being due possibly to the location of the ball over a slit or between slits.

In practice, the thickness of the sole is substantially five sixteenths of an inch and the cuts extend to a depth of a. quarter of an inch, leaving substantially one sixteenth of an inch as the The cuts I8 are placed about one sixteenth of an inch apart and as no stock is removed they form sections substantially one sixteenth of an inch wide. IThe Width of each section is such as to afford it substantial exibility and may vary with the different materials used.

The groove I4 may be formed in any desired manner, but preferably by molding and when molded there may be a fabric 30 formed in the rubber to reinforce the same at the location where the stitches pass through the sole, or this fabric may extend throughout the entire area of the sole if desired for this purpose.

' When pressure. is applied to the sole and there is a tendency to slide the same upon the surface the sect-ions open out. the sections ex and each of the cern-ers of the sections tend to wipe the surface and obtain a grip through each of these corner edges throughout the area upon which pressure is applied.

The density of the rubber may be varied throughout a considerable range, although the specific flexibility and density provided by the above tests is found to be satisfactory. The cutting of the sole occurs usually after the sole is partially cured or partially vulcanized, although the cutting may occur after complete vulcanization, it being preferable to partially vulcanize in instances where a further vulcaniaing of part of the shoe is required for the finishing operation. although where no such vulcanizing occurs l the vulcanizing will be done before the cutting occurs so that the sole after cut may be completely, assembled upon a shoe upper.

The heel of the shoe 2i is also of rubber with recesses 22 therein for the reception of nails. Slits i8 are also formed in this heel and extend short of the edge to leave a marginal uncut portion 23. Those also extend short of the opposite ends of the heel leaving arcas 24 and 25 uncut which give to the sections 26 thus formed a very good support for this portion of the shoe which receives considerable wear.

`rThe foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible. the invention being dened and limited only by the terms of the appended claims. i

I claim:

l. In a shoe. an outsole of elastic cushion rubber havingT a tread surface provided with a multiplicity of slits extending generally transversely of the shoe and in a wavy path and providing tread sections. each section being a continuous section extending from a point adjacent one margin to a point adjacent the opposite margin, the surfaces cf said tread sections formed by said slits being normally in contact when the outsole is at rest, said slits extending inwardly but partially to leave an uncut base integral with the sections, and said slits being of such a spacing and depth as to enable the tread sections to fiex on the uncut base of the outsole to an extent to tilt up and expose the corner of the section when the foot wearing the shoe and applying weight on the tread surface tends to slip upon some desired supporting surface with which the tread surface is in contact.

2. In a shoe, an outsole of elastic cushion rubber having a tread surface provided'with a multiplicity' of slits extending generally transversely of the shoe and in a wavy path and providing tread sections, each section being a continuous section extending from a point adjacent one margin to a point adjacent the opposite margin, the surfaces of said tread sections formed by said slits being normally in contact when the outsole is at rest, said slits extending inwardly to a depth greater than the width of the section and but partially through the sole to leave an uncut base integral with the sections, and said slits being of such a spacing and depth as to enable the tread sections to flex on the uncut base of the outsole to an extent to tilt up and expose the corner of the section when the foot wearing the shoe and applying weight on the tread surface tends to slip upon some desired supporting surface with which the tread surface is in contact.

3. In a shoe, an outsole ol' elastic cushion rubber having a tread surface provided with a groove inward of its periphery and a multiplicity of slits l extending generally transversely of the shoe and in a wavy path and terminating in said groove to provide tread sections, each section being a continuous section extending from the groove adjacent one margin to the groove adjacent the opposite margin, the surfaces of said tread sections fornred by said slits being normally in contact when the outsole is at rest, said slits extending inwardly but partially to leave an uncut base integral with the sections. and said slits being of such a spacing and depth as to enable the tread sections to fiex on the uncut base oI' the outsole to an extent to tilt up and expose the corner of the section when the foot Wearing the shoe and applying weight on the tread surface tends to slip upon some desired supporting surface with which the tread surface is in contact.

4. In a shoe, an outsole of elastic cushion rubber having a tread surface provided with a groove inward of its periphery and a multiplicity of slits extending generally transversely of the shoe and in a wavy path and terminating in said groove to provide tread sections, each section being a continuous section extending from the groove adjacent one margin to the groove adjacent the opposite margin, the surfaces of said tread sections formed by said slits beingr normally in contact when the outsole is at rest, said slits extending inwardly but partially to leave an uncut base integral with the sections. and said slits being of such a spacing and depth as to enable the tread sections to flex on the uncut base of the outsole to an extent to tilt up and expose the.corner of the section when the foot wearing the shoe and applying weight on the tread surface tends to slip upon some desired supporting surface with which the tread surface is in contact, and a reinforcing member in said sole at the location of said groove to strengthen the sole at the location of its attachment to the upper.

PAUL A. SPERRY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4777738 *Aug 12, 1986Oct 18, 1988The Stride Rite CorporationSlip-resistant sole
US5425184 *Mar 29, 1993Jun 20, 1995Nike, Inc.Athletic shoe with rearfoot strike zone
US5625964 *Jun 7, 1995May 6, 1997Nike, Inc.Athletic shoe with rearfoot strike zone
US5909948 *Apr 4, 1994Jun 8, 1999Ellis, Iii; Frampton E.Shoe sole structures
US6055746 *May 5, 1997May 2, 2000Nike, Inc.Athletic shoe with rearfoot strike zone
US6115945 *Dec 3, 1993Sep 12, 2000Anatomic Research, Inc.Shoe sole structures with deformation sipes
US6295744 *Feb 15, 1995Oct 2, 2001Anatomic Research, Inc.Shoe sole structures
US6591519Jul 19, 2001Jul 15, 2003Anatomic Research, Inc.Shoe sole structures
US6609312Dec 3, 1993Aug 26, 2003Anatomic Research Inc.Shoe sole structures using a theoretically ideal stability plane
US6662470Oct 12, 2001Dec 16, 2003Anatomic Research, Inc.Shoes sole structures
US6668470Jul 20, 2001Dec 30, 2003Anatomic Research, Inc.Shoe sole with rounded inner and outer side surfaces
US6708424Aug 28, 2000Mar 23, 2004Anatomic Research, Inc.Shoe with naturally contoured sole
US6729046Oct 12, 2001May 4, 2004Anatomic Research, Inc.Shoe sole structures
US6748674Nov 6, 2002Jun 15, 2004Anatomic Research, Inc.Shoe sole structures using a theoretically ideal stability plane
US6763616Aug 22, 2001Jul 20, 2004Anatomic Research, Inc.Shoe sole structures
US6877254Nov 13, 2002Apr 12, 2005Anatomic Research, Inc.Corrective shoe sole structures using a contour greater than the theoretically ideal stability plane
US7082697Jun 7, 2004Aug 1, 2006Anatomic Research, Inc.Shoe sole structures using a theoretically ideal stability plane
US7093379Nov 8, 2002Aug 22, 2006Anatomic Research, Inc.Shoe sole with rounded inner and outer side surfaces
US7127834Apr 11, 2003Oct 31, 2006Anatomic Research, Inc.Shoe sole structures using a theoretically ideal stability plane
US7168185Oct 22, 2003Jan 30, 2007Anatomic Research, Inc.Shoes sole structures
US7174658May 16, 2005Feb 13, 2007Anatomic Research, Inc.Shoe sole structures
US7287341Aug 19, 2004Oct 30, 2007Anatomic Research, Inc.Corrective shoe sole structures using a contour greater than the theoretically ideal stability plane
US7334356Jul 12, 2005Feb 26, 2008Anatomic Research, Inc.Shoe sole structures
US7546699Apr 23, 2007Jun 16, 2009Anatomic Research, Inc.Shoe sole structures
US7647710Jul 31, 2007Jan 19, 2010Anatomic Research, Inc.Shoe sole structures
US8141276Nov 21, 2005Mar 27, 2012Frampton E. EllisDevices with an internal flexibility slit, including for footwear
US8205356Nov 21, 2005Jun 26, 2012Frampton E. EllisDevices with internal flexibility sipes, including siped chambers for footwear
US8256147May 25, 2007Sep 4, 2012Frampton E. EliisDevices with internal flexibility sipes, including siped chambers for footwear
US8291618May 18, 2007Oct 23, 2012Frampton E. EllisDevices with internal flexibility sipes, including siped chambers for footwear
US8494324May 16, 2012Jul 23, 2013Frampton E. EllisWire cable for electronic devices, including a core surrounded by two layers configured to slide relative to each other
US8561323Jan 24, 2012Oct 22, 2013Frampton E. EllisFootwear devices with an outer bladder and a foamed plastic internal structure separated by an internal flexibility sipe
US8567095Apr 27, 2012Oct 29, 2013Frampton E. EllisFootwear or orthotic inserts with inner and outer bladders separated by an internal sipe including a media
US8670246Feb 24, 2012Mar 11, 2014Frampton E. EllisComputers including an undiced semiconductor wafer with Faraday Cages and internal flexibility sipes
US8732230Sep 22, 2011May 20, 2014Frampton Erroll Ellis, IiiComputers and microchips with a side protected by an internal hardware firewall and an unprotected side connected to a network
US8732868Feb 12, 2013May 27, 2014Frampton E. EllisHelmet and/or a helmet liner with at least one internal flexibility sipe with an attachment to control and absorb the impact of torsional or shear forces
DE968597C *Dec 28, 1951Mar 6, 1958Romika Kg Lemm & CoSchuhsohle, insbesondere fuer Sportschuhe
DE3134339C1 *Aug 31, 1981Mar 10, 1983Schmohl Michael Wolfgang DiplLaufsohle fuer Wassersportschuhe
EP0165353A1 *Nov 16, 1984Dec 27, 1985The Stride Rite CorporationSlip-resistant sole
WO1991005491A1 *Oct 19, 1990May 2, 1991Frampton E Ellis IiiShoe sole structures which are siped to provide natural deformation paralleling the foot
WO1991011924A1 *Feb 7, 1991Aug 22, 1991Frampton E Ellis IiiShoe sole structures with deformation sipes
WO1991019429A1 *Jun 18, 1991Dec 26, 1991Frampton E Ellis IiiShoe sole structures
Classifications
U.S. Classification36/59.00R
International ClassificationA43B13/22, A43B13/14
Cooperative ClassificationA43B13/223
European ClassificationA43B13/22B