Sporting and exercising spring shoe

Details Sporting and exercising spring shoe Sporting and exercising spring shoe

1981-04-21

1985-01-08

Pinkham, Richard C.

Undertaking

36 78, 36113, 267 28, 267 29, 267 48, 272DIG9, A63B 2510

Patent

active

044923740

ABSTRACT:
The invention relates to a sporting and exercising unit which includes a foot receiving member and a spring member attached to and disposed at the bottom of the foot receiving member. The spring member includes a spring-leaf-like portion which forms a closed loop and is shaped to permit backward and forward rocking of the user. The spring member may be oval shaped, circle shaped, or in the shape of a parallelogram. The foot receiving member is adjustable to receive different sizes of feet and legs by having opening flaps extending therealong and openings for receiving laces in the flaps whereby to adjust the sizes of these portions by adjusting the sizes of the openings and to adjustably close the openings.

REFERENCES:
patent: 577428 (1897-02-01), Hawes
patent: 905981 (1908-12-01), Blair
patent: 921862 (1909-05-01), Mayhew
patent: 996220 (1911-06-01), Cushman
patent: 1597792 (1926-08-01), Hoff et al.
patent: 1638350 (1927-08-01), Long
patent: 1843493 (1932-02-01), Pfeifenbring
patent: 2168820 (1939-08-01), Edstrom
patent: 2560999 (1951-07-01), Unzeitig
patent: 3377722 (1968-04-01), Downing
patent: 4294023 (1981-10-01), Banford

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