Crank and slider/four-bar variable resistance carriage-type leg

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272117, A63B 2100

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048282545

ABSTRACT:
A carriage-type leg press exercise machine which applies a pre-determined variably resistive force to an operator's thigh and hip extending muscles through the use of a kinematically derived double-rocking-lever four-bar linkage, whose rocking follower lever constitutes a rotating weight arm to which weights are loaded and whose rocking driver lever is mechanically linked to an operator-engaging guided-carriage assembly which slides along the path of the leg press exercise movement, as is conventional.

REFERENCES:
patent: 3622154 (1971-11-01), Williams
patent: 3866914 (1975-02-01), Jackson
patent: 4333644 (1982-06-01), Lambert, Jr. et al.
patent: 4336934 (1982-06-01), Hanagan et al.
patent: 4357010 (1982-11-01), Telle
patent: 4535985 (1985-08-01), Mask

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