Hydraulic cylinder-piston unit provided with a mechanical safety

Details Hydraulic cylinder-piston unit provided with a mechanical safety Hydraulic cylinder-piston unit provided with a mechanical safety

1989-06-08

1993-04-27

Look, Edward K.

Expansible chamber devices

With releasable stop or latch means to prevent movement of...

Includes interfitting parts engageable at plural positions...

92 24, 92 27, F15B 1526

Patent

active

052052036

ABSTRACT:
A hydraulic jack particularly intended for use in automobile lifts includes a safety stop mechanism including a fixed toothed rod and a piston-supported pawl mechanism which includes one or more stop members. Each of the stop members can be retracted, to allow the jack to collapse, by applying hydraulic pressure to the chamber above the piston.

REFERENCES:
patent: Re25334 (1963-02-01), Michalak, Jr.
patent: 2540578 (1951-02-01), Hall et al.
patent: 2808810 (1957-10-01), Lindley
patent: 2811951 (1957-11-01), Bodem et al.
patent: 3008454 (1961-11-01), Wilkins
patent: 3020888 (1962-02-01), Braun
patent: 3104593 (1963-09-01), Clifton et al.
patent: 3342111 (1967-09-01), Royster
patent: 3578783 (1971-05-01), Loustalet et al.
patent: 3831901 (1974-08-01), Williams et al.
patent: 4754694 (1988-07-01), Martin

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