Undertaking
Patent
1986-01-09
1988-03-01
Apley, Richard J.
Undertaking
272143, 272142, A63B 2102
Patent
active
047281030
ABSTRACT:
An exercising device for strengthening joints of the body, particularly the ankle joint, wherein a plate engageable against the foot of the user imparts controlled resistance in all directional movements of the joint through elastic limbs having one set of corresponding ends attached to predetermined points around the periphery of the plate and the other set of corresponding ends attached to a pair of handles which are gripped by the user for varying the degree of resistance imparted by the limbs.
REFERENCES:
patent: 843478 (1907-02-01), Muller
patent: 1671096 (1928-05-01), Anderson
patent: 1952750 (1934-03-01), Gailey
patent: 2097376 (1937-10-01), Marshman
patent: 2160722 (1939-05-01), Cunningham
patent: 4019734 (1977-04-01), Lee et al.
patent: 4198044 (1980-04-01), Holappa
patent: 4251070 (1981-02-01), Leseberg
patent: 4596387 (1986-06-01), Roberts
Apley Richard J.
T.F.S. Inc.
Welsh J.
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