1984-10-09
1987-01-06
Hafer, Robert A.
Undertaking
272137, 272141, A63B 2102, A63B 2130
Patent
active
046341145
ABSTRACT:
A hand exerciser for strengthening the hand includes a plurality of helical spring segments mounted on a unitary cylindrical shaped shaft. The separate springs are locked between a wing nut at one end of the shaft and between the bushing next to the handle which is located at the other end.
Located between the segments of the springs are a plurality of separators and a floating bushing for locking the springs into their predetermined positions.
An inside handle is mounted on the shaft. An outside handle is mounted on the shaft surrounding the inside handle. The inside handle is mounted on the shaft at the end thereof opposite from the wing bolt. The outside handle has an inclined portion for the purpose of maintaining leverage when gripped by the user.
The inside handle is gripped by the fingers of the user and pulled by the thumb and the remaining part of the hand towards the outside handle against the tensions of the plurality of springs. The spring segments are separated by spacers that act as safety devices as well as reducing the cost of manufacture.
REFERENCES:
patent: D234309 (1975-02-01), Buchner
patent: 668473 (1901-02-01), Yount
patent: 688499 (1901-12-01), Bell
patent: 2205161 (1940-06-01), Vick
patent: 3442132 (1969-05-01), De Mare
patent: 3445109 (1969-05-01), Kolbel
patent: 4226412 (1980-10-01), Panepinto
patent: 4239212 (1980-12-01), Hickey
patent: 4351527 (1982-09-01), Crisp, Jr.
D'Arrigo Kathleen J.
Hafer Robert A.
Michelman Leonard S.
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