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Publication numberUS2552711 A
Publication typeGrant
Publication dateMay 15, 1951
Filing dateSep 22, 1949
Priority dateSep 22, 1949
Publication numberUS 2552711 A, US 2552711A, US-A-2552711, US2552711 A, US2552711A
InventorsDunker Martha
Original AssigneeDunker Martha
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sole to permit circulation of air in rubber footwear
US 2552711 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

y 1951 M. DUNKER 2,552,711


Application September 22, 1949, Serial No. 117,227

1 Claim. 1

This invention relates to ventilated footwear. invention pertains to rubber boots and the like and means for aerating same. Further the invention relates to means for equippin boots in a manner to protect the feet of the wearer against cold air and dampness.

An object of the invention is to provide boots and other footwear with means for circulating air therethrough while same are in use. Another object is to provide for ventilating footwear by means which prevent water from entering to wet the feet and stockings of the wearer. It is also an object to provide footwear which is sanitary and healthful. Also it is an object to provide simple and inexpensive means for accomplishing the results set forth. Other objects and the advantages of the invention will appear as the specification is read in connection with the drawing forming a part thereof in which:

Figure 1 is an elevation, side view in section of a boot embodying the invention in a preferred form.

Figure 2 is a top view, in section, of Fig. 1, taken on the line 2-2.

Figure 3 is a top view of Fig. 1, in section taken on the line 33.

In the drawing is shown a boot comprisin an upper portion 4 to which is suitably attached the sole 5 and the heel 6 all in a well known manner. Within the lower foot portion of the boot is a foot-plate l which may be composed of suitable resilient material such as leather, for example. This foot plate I is sealed along its outer edge to the inner face of the boot or shoe so as to form a space 8 between same and the inner face of the sole 5. Suitable resilient means such as the spring 9, serves to urge the plate I away from the sole 5 so as to maintain an air space 8, therebetween. Preferably, at the rear of the boot is formed a duct 10 which runs from the top ll of the boot down to the inlet port l2 by means of which the duct l communicates with the space 8. This space 8, of suitable area is formed in the intermediate sole member [5. The inlet port I2, is equipped with a check-valve l3 which is adapted to be closed by the pressure of the air in space 8 when the plate I is depressed as for example by the foot of a person wearing the boot. As shown in Fig. 2 the plate I, is provided with holes or air ports [4 and as shown in Fig. 3, the plate I may be further supported by a suitable resilient material, such as sponge rubber or the like, which may be formed to provide the air space 8 previously referred to. From the above it will be seen that when the boot is worn by a person, and steps are taken, the weight of the person will depress the plate 1 and the air in space 8, which because of the valve 13, cannot escape through the duct I0, upon being displaced is forced through the openings or ports l4 and must pass upwardly and out of the boot at the top H. Accordingly, as a person walks, air will be drawn into the boot to the space 8, through the duct 10 as the plate is returned to its normal position by the spring 9, and expelled from the space 8 through the ports H as the said plate 1 is depressed. In this manner, as the person wearing the boot walks, fresh air is pumped into the boot, circulated therethrough and ejected with each step taken. As the circulating air is drawn into the boot at the upper portion thereof I l, the foot is ventilated by the fresh incoming air and there is no danger of water entering in wet weather and storm. Boots constructed in accordance with my invention are healthy to wear, comfortable and sanitary. They are well suited to usage over long periods of constant service as Well as for casual use.

Having illustrated and described a preferred embodiment of my invention it will be understood that structural changes may be made without departing from the spirit of the invention as set forth in the following claim, I claim as my invention:

In a ventilated boot, the combination of a boot upper having a sole attached thereto, an inner sole sealed at its edges to the interior of the foot of the boot and spaced above the inner surface of the sole, resilient means for retaining the inner sole normally in its spaced relationship, air vents in the inner sole in communication with the space between it and the inner surface of the boot sole, an air inlet duct in communication with said space and leading to the top of the boot upper and a valve in said duct which is adapted to be closed by the pressure of the air displaced through the said air vents when the said inner sole is angularly depressed.


REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 426,495 Falkner Apr. 29, 1890 1,335,273 Bruce Mar. 30, 1920 1,469,291 Bojtos Oct. 2, 1923 1,660,698 Williams Feb. 28, 1928 2,190,802 Powell Feb, 20, 19 0 2,480,035 Lindstrom Aug, 23, 1949 FOREIGN PATENTS Number Country Date 89,045 Sweden Apr. 13, 1940 105,616 Great Britain Apr, 20, 1917

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US426495 *Aug 28, 1889Apr 29, 1890 Ventilated shoe
US1335273 *Jul 26, 1919Mar 30, 1920 Rubber shoe
US1469291 *May 18, 1922Oct 2, 1923Dezso BojtosWaterproof boot
US1660698 *Oct 27, 1926Feb 28, 1928Sr Ormsby P WilliamsVentilating foot covering
US2190802 *Oct 24, 1938Feb 20, 1940Powell Le Roy GVentilated boot
US2480035 *Aug 1, 1947Aug 23, 1949Lindstrem Arnold OVentilated boot
GB105616A * Title not available
SE89045A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2676422 *Aug 13, 1951Apr 27, 1954Arthur C CrawfordAerator pump for shoes
US2741038 *Jul 23, 1952Apr 10, 1956Per EliassenAir conditioned footwear
US4977891 *Nov 8, 1989Dec 18, 1990Royce Medical CompanyInsertion into a shoe
US4993173 *Aug 29, 1989Feb 19, 1991Gardiner James TShoe sole structure
US4999932 *Feb 14, 1989Mar 19, 1991Royce Medical CompanyVariable support shoe
US5348530 *Jul 29, 1993Sep 20, 1994Royce Medical CompanyPneumatic ankle brace with bladder and pump arrangement
US5353525 *Feb 4, 1991Oct 11, 1994Vistek, Inc.Variable support shoe
US5401039 *Jun 28, 1993Mar 28, 1995Wolf; DavidVentilated in-line roller skate
US5619809 *Sep 20, 1995Apr 15, 1997Sessa; RaymondShoe sole with air circulation system
US5815949 *Jun 10, 1997Oct 6, 1998Sessa; Raymond V.Footwear insert providing air circulation
US8087409 *Feb 4, 2009Jan 3, 2012Chun-Yen KungHeater for footwear
US20130326910 *Dec 15, 2011Dec 12, 2013Puma SEShoe, in particular a sports shoe
WO1990009114A1 *Feb 13, 1990Aug 23, 1990Skip Klintworth Investments InVariable support shoe
U.S. Classification36/3.00R, 126/204
International ClassificationA43B7/08
Cooperative ClassificationA43B7/081
European ClassificationA43B7/08B