Swimming pool lift

Details Swimming pool lift Swimming pool lift

1974-01-24

1976-05-11

Smith, Al Lawrence

Implements or apparatus for applying pushing or pulling force

Multiple lifters

417213, 254 93R, E04H 319

Patent

active

039557979

ABSTRACT:
A platform positioned in a swimming pool has a slave hydraulic ram at each corner which raise and lower the platform. Each ram has a barrel attached to the platform and a piston rod which is supported on the bottom of the pool. There is a hydraulic motor for each slave ram. The hydraulic fluid in this system is water. Each hydraulic motor comprises a cylinder with a piston therein. Each time that the pistons of the motor cylinders are retracted make-up water flows into the system from a tank. The pistons of the motor cylinders are actuated in unison by a single main cylinder. The main cylinder is operated by hydraulic fluid from a hydraulic pump through a control valve.

REFERENCES:
patent: 2779949 (1957-02-01), Crispen
patent: 2942848 (1960-06-01), Friesen
patent: 3413661 (1968-12-01), Ross

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