Hand exerciser

Details Hand exerciser Hand exerciser

1977-09-16

1980-10-07

Pinkham, Richard C.

Undertaking

272142, A63B 2130

Patent

active

042264120

ABSTRACT:
A long slotted sleeve holds the two U-shaped members together and serves dual function of a guide and stop. Tension springs extend between the two cross portions of the U-shaped members to provide resistance.

REFERENCES:
patent: 689652 (1901-12-01), Perry
patent: 938348 (1909-10-01), Stull
patent: 1620910 (1927-03-01), Minnich
patent: 1623670 (1927-04-01), Frankenfield
patent: 1877218 (1932-09-01), Blank
patent: 3570849 (1971-03-01), Ratchford

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