Undertaking
Patent
1980-12-15
1983-02-22
Johnson, Richard J.
Undertaking
272125, 192 93A, A63B 2132
Patent
active
043745881
ABSTRACT:
An isokinetic exercise device comprises in a linking arrangement first and second manually-operated members with a floating plate and brake assembly therebetween, all members mounted in rotation about a shaft member. A series of paired arcuate raceways, having a non-linear sloped profile, are located in the opposing faces of the floating plate and the first member. Captivation of a ball bearing between the raceways presents a driving connection for transmittal of forces, created by operator rotation of the first and second members, to the brake assembly. The brake assembly responds to such forces to retard rotation of the first and second members linked thereto, such retardation presented as a resistance to the user. A speed selector assembly provides for a selectable change in the location and attitude of the driving connection so as to control the efficacy of the driving connection which changes the degree of forces transmitted to the brake assembly. The brake assembly is functionally responsive to such changes so as to vary the retardation offered to the rotatable members and thus the resistance presented to the user. The speed selector accordingly provides selectable speeds of operation to the exercise device.
REFERENCES:
patent: 2725232 (1955-11-01), Magida
patent: 3127969 (1964-04-01), Hanson
patent: 3596907 (1971-08-01), Brighton
patent: 3640530 (1972-02-01), Henson
patent: 3896672 (1975-07-01), Henson
patent: 3929331 (1975-12-01), Breeding
Chase D. A. N.
Isokinetic Sales Co.
Johnson Richard J.
Yakimo, Jr. Michael
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