Four-bar rigid-drive variable resistance pectoral fly machine

Details Four-bar rigid-drive variable resistance pectoral fly machine Four-bar rigid-drive variable resistance pectoral fly machine

1988-03-24

1989-06-20

Apley, Richard J.

Undertaking

272117, A63B 2100

Patent

active

048403733

ABSTRACT:
A shoulder-joint horizontal-flexion exercise machine (pec-deck or pectoral fly machine) which applies a predetermined variably resistive force to an operator's shoulder-joint horizontal-flexion 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, through rigid connecting rods, to a pair of offset rigid counter-rotating assemblies which rotate on axes which are approximately common with the vertical axes through the operator's shoulder joints. These counter-rotating assemblies contain body-machine force-transmitting contact surfaces which engage the operator's upper arms and apply resistive force to the same through circular paths about the vertical axes of rotation of the operator's shoulder joints.

REFERENCES:
patent: 3640527 (1972-02-01), Proctor
patent: 3912261 (1975-10-01), Lambert, Sr.
patent: 4336934 (1982-06-01), Hanagan et al.
patent: 4357010 (1982-11-01), Telle
patent: 4494751 (1985-01-01), Schnell
patent: 4505475 (1985-03-01), Olschansky et al.

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