Lat isolating exercise machine

Details Lat isolating exercise machine Lat isolating exercise machine

1987-01-27

1988-07-19

Apley, Richard J.

Undertaking

272117, A63B 2100

Patent

active

047579919

ABSTRACT:
An arm adduction exercise machine which utilizes two frame-journaled mechanically-linked counter-rotating effort arms to apply variably resistive force to an operator's arm adducting muscles via body-machine contact with the back of the operator's upper arm and the side of the operator's corresponding hip. The upper of these two effort arms, which contains the upper arm engaging contact surface, rotates about an axis which is approximately common with the sagittal axis of rotation of the operator's exercising shoulder joint. The lower of these two effort arms, which contains the corresponding hip engaging contact surface, rotates about a parallel axis which is approximately common with the center of the operator's back. The position of the operator's exercising shoulder joint is maintained while performing the exercise by a horizontally adjustable frame-mounted body-machine contact surface which engages the side of the operator's non-exercising shoulder and a vertically adjustable lower effort arm mounted body-support surface which engages the operator's seat while performing the exercise from the seated operating position. A rotating weight arm assembly is journaled in the machine's frame on an axis which is parallel with the axis of rotation of the upper effort arm. The rotating weight arm assembly and the upper effort arm are mechanically linked to each other by a connecting link which together with these two rotating assemblies and the frame of the machine form a four-bar linkage system. This four-bar linkage system, together with the rotating weight arm, applies a variably resistive force at the arm and hip engaging surfaces which varies as a function of the position of the arm and hip engaging contact surfaces and is correlated to the normal strength-to-position force applying capabilities of the average operator in the arm adduction exercise movement.

REFERENCES:
patent: 3917262 (1975-11-01), Salkeld
patent: 4211403 (1980-07-01), Coffaro et al.
patent: 4621810 (1986-11-01), Cummins
Universal Catalog 1983-1984, p. 24, "No. 3211 SR High Pulley Machine".

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