Boots – shoes – and leggings – Boots and shoes – Occupational or athletic shoe
Reexamination Certificate
2002-08-08
2004-12-07
Stashick, Anthony (Department: 3728)
Boots, shoes, and leggings
Boots and shoes
Occupational or athletic shoe
C036S062000, C036S06700D
Reexamination Certificate
active
06826854
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a friction device for footwear wherein a friction body such as a nonslip body to be used on footwear such as golf shoes is held on the sole of footwear by a holder being provided on the sole of footwear, and in particular, a friction device for footwear, which effectively prevents sand grains or the like from penetrating into any space between the friction body and the holder, and the friction body and the sole of footwear of said friction device for footwear.
2. Description of the Prior Art
For a nonslip body for golf shoes, which is an example of a friction body for footwear, metal and ceramic spikes have been used. In recent years, however, nonslip bodies of synthetic resins are used increasingly to prevent damages to the green, etc. and to improve the comfortableness to wear. Such nonslip bodies of synthetic resins, however, are easy to wear in comparison with metallic ones. Hence nonslip bodies of synthetic resins are provided with a fit-in protrusion, for example, a male screw of a metal or a synthetic resin, on their rear side, and the soles of the golf shoes are provided with holders, for example, holders having a female screw of a metal, which fits together with the male screw by screwing, so that the nonslip bodies can be detached and replaced as easily as possible.
However, when the nonslip body is fitted with the holder by screwing, etc. and held by the holder, if any of fine stone particles, sand grains, soil particles, lawn, dust, etc. penetrate into any space between the nonslip body and the holder, in particular, between the fit-in protrusion and the holder, it may become difficult to undo the fitting such as a screwed one, or the operation to undo the fitting may damage the holder or the friction body, or strained operation may cause injuries.
The present invention was made in view of the above-mentioned problems posed by the prior art, and one object of the present invention is to provide a friction device for footwear, which effectively prevents sand grains or the like from penetrating into any space between the friction body and the holder, any difficulties in undoing the fitting, any undoing operation of the fitting from damaging the holder or the friction body, and any strained operation from causing injuries, and to provide the friction body of said friction device for footwear.
SUMMARY OF THE INVENTION
The friction device for footwear according to the present invention comprises a friction body comprising a friction part, which is used in a state of being held on a sole of footwear to contact an object to be stepped on by the sole of footwear and generate frictional forces between itself and the object, a fit-in protrusion, which fits in and is detachably held by a holder provided on the sole of footwear, said fit-in protrusion being provided, in a condition being held on the sole of footwear, on the rear part of said friction part corresponding to the face of the sole of footwear and/or the surface part of the holder, and an annular rib or an annular groove, and an annular packing part, on said rear part of the friction part, on the outer circumference side of said fit-in protrusion, and
an annular groove or an annular rib corresponding to said annular rib or annular groove, and an annular packing part corresponding to said annular packing part, on the face of the sole of footwear and/or the surface part of the holder,
wherein one or both of said both annular packing parts is made of an elastic material, and
that when the fit-in protrusion is fitted in and held by the holder and the friction body is held on the sole of the footwear, said annular rib fits in said annular groove, and said both annular packing parts tightly and elastically contact and press each other over the entire circumference.
The friction body according to the present invention comprises a friction part, which is used in a state of being held on a sole of footwear to contact an object to be stepped on by the sole of footwear and generate frictional forces between itself and the object, and
a fit-in protrusion, which fits in and is detachably held by a holder provided on the sole of footwear,
wherein said fit-in protrusion is provided, in a condition being held on the sole of footwear, on the rear part of said friction part corresponding to the face of the sole of footwear and/or the surface part of the holder, and
that, of said rear part of the friction part, a part on the outer circumference side of said fit-in protrusion is provided with an annular rib or an annular groove, and an annular packing part.
The sole of footwear according to the present invention is a sole for footwear which is provided with a holder for fitting with and holding a fit-in protrusion of a friction body, said friction body comprising a friction part to be used in a state of being held on the sole of footwear to contact an object to be stepped on by the sole of footwear and generate frictional forces between itself and the object and the fit-in protrusion, wherein
on the face of the sole of footwear and/or the surface part of the holder, with said holder on the sole of footwear serving as the center, an annular groove or an annular rib, and an annular packing part are provided.
When the friction body is fitted with and held by the holder, if any of fine stone particles, sand grains, soil particles, lawn, dust, etc. penetrate into any space between the friction body and the holder, in particular, between the fit-in protrusion and the holder, it may become difficult to undo the fitting between them, or the operation to undo the fitting may damage the holder or the friction body, or strained operation may cause injuries.
In the case of this friction device for footwear, the friction body and the sole of footwear, an annular rib or an annular groove, and an annular packing part are provided on the rear face of the friction part of the friction body, in such a way that one is located on the inner circumference side of the other, and in correspondence with them, an annular groove or an annular rib, and an annular packing part are provided on the face of the sole of footwear and/or the surface part (sole of footwear) of the holder, and when the fit-in protrusion is fitted in and held by the holder and the friction body is held on the sole of footwear, said annular rib fits in said annular groove, and said both annular packing parts press and contact each other tightly and elastically over the entire circumference. In other words, when the friction body has the annular rib, the sole of footwear has the annular groove, and when the friction body has the annular groove, the sole of footwear has the annular rib.
When the footwear is in the state of use, namely, the fit-in protrusion of the friction body is fitted in and held by the holder provided on the sole of footwear, and the footwear is ready to step on the ground, the annular rib of the friction body or the sole of footwear fits in the annular groove of the other, and on the inner circumference side or the outer circumference side of them, the annular packing part of the friction body tightly and elastically contacts and presses the annular packing part of the sole of footwear over the entire circumference.
As described above, the double shielding structures, namely, the fit-in structure of the annular rib and the annular groove and the sealing structure of tight and elastic contacting and pressing of both the annular packing parts over the entire circumference, effectively prevent any foreign matters such as sand grains from penetrating into any space between the friction body and the holder, irrespective of any deformations that may be generated in various parts of the friction body and the sole of footwear when the footwear is used. Furthermore, the sealing structure by tight and elastic contacting and pressing over the entire circumference between both the annular packing parts can exhibit an effect of absorbing dimensional errors to some extent while preventing penetrati
McGlew and Tuttle , P.C.
Stashick Anthony
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