Weight stack with vacuum-actuated pneumatic motor for lift assis

Details Weight stack with vacuum-actuated pneumatic motor for lift assis Weight stack with vacuum-actuated pneumatic motor for lift assis

1987-11-06

1989-07-18

Garrett, Robert E.

Undertaking

60412, A63B 2106

Patent

active

048487384

ABSTRACT:
Airlift apparatus used in conjunction with a weight lifting machine that utilizes a stack of weighs. It assists the weight lifter when fatigue occurs. Its construction is of plastic, consisting of a cylinder and a piston. The piston is moved by differences in air pressure which is induced by a vacuum pump located at the bottom of the cylinder. A cable and a series of pulleys connect the weight stack to the piston. The system is activated by the lifter at any stage of the lift by a foot or hand operated switch. When not in use the Airlift does not adversely affect the normal operations of the weight lifting machine.

REFERENCES:
patent: 4253662 (1981-03-01), Podolak
patent: 4509745 (1985-04-01), Angsten
patent: 4609189 (1986-09-01), Brasher
"Fitness Shop Section", Muscle & Fitness, Nov. 1986, p. 235.

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