Exercise machine

Details Exercise machine Exercise machine

1993-01-06

1994-09-27

Bahr, Robert

Exercise devices

User manipulated force resisting apparatus, component...

Utilizing weight resistance

482 1, 482 5, 310 15, A63B 21062

Patent

active

053503449

ABSTRACT:
An exercise machine includes a weight stack with a plurality of separate weights and a lift bar for vertical movement with the stack. A pin assembly removably secures a desired portion of the weight stack to the lift bar for vertical movement therewith so that the total weight carried by the lift bar is determined by the portion of the weight stack removably secured to the lift bar by the pin assembly. The pin assembly includes at least one pin operated by a two-position or double action actuator, each pin being movable by its actuator over a predetermined stroke. Each actuator includes a first device for positively moving the pin to an extended position to removably secure a portion of the weight stack to the lift bar and a second device for positively moving the pin to a retracted position in which the corresponding of the weight stack is free of the lift bar.

REFERENCES:
patent: 3635472 (1972-01-01), Marltan
patent: 3971555 (1976-07-01), Mahnke
patent: 4140932 (1979-02-01), Wohlert
patent: 4363980 (1982-12-01), Petersen
patent: 4610449 (1986-09-01), Diercks, Jr.
patent: 4709176 (1987-11-01), Ridley et al.
patent: 4746113 (1988-05-01), Kissel
patent: 4811946 (1989-03-01), Pelczar
patent: 5037089 (1991-08-01), Spagnuolo et al.

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