Boots – shoes – and leggings – Soles – Cushion
Reexamination Certificate
2000-03-20
2001-07-31
Sewell, Paul T. (Department: 3728)
Boots, shoes, and leggings
Soles
Cushion
C036S029000, C036S00300B, C036S03000A, C036S03200A
Reexamination Certificate
active
06266896
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a shoe sole, and more particularly to a shoe sole which is provided with means to reduce the weight of the shoe sole.
BACKGROUND ART
As shown in
FIGS. 1 and 2
, a prior art shoe sole
10
is provided with a number of blind holes
11
for reducing the weight of the prior art shoe sole
10
and for reducing the amount of the material that is used to produce the shoe sole
10
. The use of the blind holes
11
to reduce the weight of the shoe sole
10
and the amount of the material of which the shoe sole
10
is made is rather primitive at best and is rather ineffective. The structural strength of the shoe sole
10
is apt to to be weakened by the blind holes
11
, thereby making the shoe sole
10
a safety hazard.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a shoe sole which is light in weight.
It is another objective of the present invention to provide a shoe sole which is light in weight and yet strong in structure.
It is still another objective of the present invention to provide a lightweight shoe sole which is cost-effective.
In keeping with the principle of the present invention, the foregoing objectives of the present invention are achieved by a shoe sole which is made of a polyurethane foam body of an ultra lightweight material and having a plurality of through holes, with each being provided therein with a connection rod for connecting the upper side and the lower side of the shoe sole. The polyurethane foam body is provided with a plurality of material-reducing holes to minimize the production cost of the polyurethane foam body.
The foregoing objectives, features, functions, and advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 4223456 (1980-09-01), Cohen
patent: 4494322 (1985-01-01), Klagmann
patent: 4597199 (1986-07-01), Hong
patent: 4774774 (1988-10-01), Allen, Jr.
patent: 4852274 (1989-08-01), Wilson
patent: 4864738 (1989-09-01), Horovitz
patent: 5025573 (1991-06-01), Giese et al.
patent: 5044096 (1991-09-01), Polegato
patent: 5493791 (1996-02-01), Kramer
patent: 6061928 (2000-05-01), Nichols
patent: 0190714 (1986-08-01), None
patent: 1221716 (1960-06-01), None
Ding Sheug Industry Co., Ltd.
Harrison & Egbert
Moh'andesi Jila M.
Sewell Paul T.
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