Torsion spring type wrist exercising device

Details Torsion spring type wrist exercising device Torsion spring type wrist exercising device

1977-09-27

1979-05-22

Pinkham, Richard C.

Undertaking

272140, 272DIG4, 272DIG5, 73379, A63B 2122

Patent

active

041555473

ABSTRACT:
An arm exercising device for strengthening of the wrist, forearm and elbow, the invention comprises a pair of longitudinally aligned tubular members movable axially relative to each other, such movement being resisted by an adjustable spring force. A spring system has its length varied to adjust the tension, and thus the torsion of said spring system, one of the tubular members preferably being formed of a clear material in order that the adjustment can be visually observed.

REFERENCES:
patent: 2909055 (1959-10-01), Fish
patent: 3084547 (1963-04-01), Nielsen
patent: 3330558 (1967-07-01), Simons
patent: 3708164 (1973-01-01), Griffin
patent: 4026548 (1977-05-01), Birdwell

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