Boots – shoes – and leggings – Soles – Cushion
Reexamination Certificate
2002-05-03
2004-04-13
Stashick, Anthony D. (Department: 3728)
Boots, shoes, and leggings
Soles
Cushion
C036S103000, C036S107000, C036S038000, C036S027000, C267S158000, C267S160000
Reexamination Certificate
active
06718655
ABSTRACT:
BACKGROUND OF THE INVENTION AND PRIOR ART
The present invention relates to a footwear bottom free from feeling of fatigue used for footwears such as Japanese sandals (slippers), sandals, training shoes, shoes for rehabilitation and the like, and a cushion-action applying implement used for the former.
Various devices have been proposed heretofore, in which an elastic substance is embedded in the sole of a shoe, and walking is made easier by the repulsion action thereof.
For example, in Japanese Patent Application Laid-Open No. Hei 10 (1998)-66604 Specification, there are proposed foams comprising synthetic rubber or urethane rubber, air cushion caused by a compression coil spring or a cave-like portion, and a construction in which an elastic substance such as a disc spring or a plate spring is embedded to apply the cushioning to the sole of a shoe, any of which however always have the cushion action and repulsion action.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a footwear bottom which enables to provide the configuration that at the time of walking, he or she steps forward from the heel, the whole bottom is then placed in contact with the ground, and afterwards, the push-up force is applied to the heel at the time of stepping forward to help movement of weight at the time of advancing, and which enables to assume the state that at the time of normal walking or at the time of putting away, the push-up force is not given, and a cushion-action applying implement used for the footwear bottom.
The present invention has been accomplished in order to solve the aforementioned object. According to a first invention of the invention, there is provided a footwear bottom characterized in that a cushion-action applying implement comprising a gutter-like receiver, a plate spring in which a flexing portion is inserted into the gutter-like portion, the flexing portion is provided in its both sides with embedded portions in series, and an angle formed by the embedded portions is V or nearly horizontal, a switching shaft provided with a cam for pushing the flexing portion of the plate spring to change the angle formed by the embedded portions and in which an engaging portion for rotation is provided on the end thereof, a bearing of the switching shaft fixedly mounted on both ends of the gutter-like receiver, and a drive means for rotating the switching shaft is embedded in the flexing portion of the footwear bottom body.
The embedded portions may be secured to the footwear bottom body, or one or both may be embedded movably.
According to a second invention, there is provided a cushion-action applying implement which is embedded, for use, in a footwear bottom comprising a gutter-like receiver, a plate spring in which a flexing portion is inserted into the gutter-like portion, the flexing portion is provided in its both sides with embedded portions in series, and an angle formed by the embedded portions is V or nearly horizontal, a switching shaft provided with a cam for pushing the flexing portion of the plate spring to change the angle formed by the embedded portions and in which an engaging portion for rotation is provided on the end thereof, a bearing of the switching shaft fixedly mounted on both ends of the gutter-like receiver, and a drive means for rotating the switching shaft.
In the first and second inventions, alternatively, the gutter-like receiver may be formed of metal or synthetic resin, an embedded fixing plate is secured to the outside thereof so that the gutter-like receiver may be secured to the footwear bottom body firmly, and the flexing portion of the plate spring may be of a reversed &OHgr;, or a triangle or a
shape.
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patent: 5778560 (1998-07-01), Danieli
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patent: 6436012 (2002-08-01), Naville
patent: 6588125 (2003-07-01), Proctor, Sr.
patent: 9-051803 (1997-02-01), None
patent: 10-066604 (1998-03-01), None
patent: 11-225801 (1999-08-01), None
patent: 2000-175703 (2000-06-01), None
Stashick Anthony D.
Wenderoth , Lind & Ponack, L.L.P.
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