Mechanically lockable hydraulic cylinder jack

Details Mechanically lockable hydraulic cylinder jack Mechanically lockable hydraulic cylinder jack

1977-12-28

1980-12-23

Hershkovitz, Abraham

Expansible chamber devices

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

Means includes element interfitting between working member...

92 17, 92 33, 92114, F15B 1526

Patent

active

042403340

ABSTRACT:
Disclosed herein is a hydraulic jack comprising a cylinder and a piston rod assembly which is movable between a retracted position and an extended position relative to the cylinder. The jack also has mechanical locking means including a rotatable shaft and movable into engagement with the piston rod assembly in response to rotation of the shaft, thereby to lock the piston rod assembly in its extended position. The locking means reinforces the piston rod assembly in its extended position along substantially the entire length of the piston rod assembly.

REFERENCES:
patent: 2730994 (1956-01-01), Light
patent: 2934319 (1960-04-01), Wahlstrom
patent: 3003470 (1961-10-01), Geyer
patent: 3092082 (1963-06-01), Geyer
patent: 3702181 (1972-11-01), Keller, Jr.

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