Hand-muscle developer

Details Hand-muscle developer Hand-muscle developer

1991-06-05

1992-03-31

Bahr, Robert

Exercise devices

Hand, wrist, or finger

Involving wrist rotation

482124, 482127, A63B 21045

Patent

active

051001268

ABSTRACT:
A hand-muscle developer, comprising a tubular base having a rocker arm pivotably connected thereto at one end by a pair of connecting plates and a pair of links with two pairs of torsional springs respectively retained therebetween. Operator's hand is inserted through the tubular base to hold a cross bar on the rocker arm and to drive it to rotate back and forth. Rotating the tubular base causes the torsional springs to produce a resisting force against the applied force from operator's hand and therefore, operator's hand muscles are trained. Adjusting screws are provided for adjusting the tension of the torsional springs.

REFERENCES:
patent: 4039183 (1977-08-01), Sakurada
patent: 4226412 (1980-10-01), Panepinto
patent: 4310154 (1982-01-01), Kauffman
patent: 4417727 (1983-11-01), Ottenheimer
patent: 4585228 (1986-04-01), Olson
patent: 4589655 (1986-05-01), Ammon
patent: 4836531 (1989-06-01), Niks

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