Fluid-powered multiple pistonrod lift unit

Details Fluid-powered multiple pistonrod lift unit Fluid-powered multiple pistonrod lift unit

1984-08-06

1985-12-03

Maslousky, Paul E.

Expansible chamber devices

With cushioning means effective over a portion only of stroke

92165PR, 92166, 92168, 92169, F01B 1102, F16J 1518

Patent

active

045559791

ABSTRACT:
A fluid-powered lift unit having a plurality of pistonrods attached to a piston which translates axially but within a tube. The tube is provided with an end cap and a base which in conjunction with the piston defined two fluid-tight regions. The pistonrods extend from the piston and sealingly extend through the end cap thereby preventing piston rotation and causing the lift unit to be rigid with the piston in the extended or contracted position.

REFERENCES:
patent: 1940800 (1933-12-01), Johansen
patent: 4068532 (1974-09-01), Descoteaux et al.
patent: 4252361 (1976-03-01), Descoteaux et al.
patent: 4351628 (1978-07-01), Drexel et al.
Ex. A-Chilton's Product Design & Development Magazine, vol. 39, No. 7, Multi-Angle Rotary Actuator of Rotomation; p. 45.
Ex. B-Parker Fluid Power brochure, Hydraulic Cylinder Cushioning; of unknown date.
Ex. C-Aeroquip QR-70 Super Cushion brochure of unknown date.

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