Safety lock for raising and lowering mechanism

Details Safety lock for raising and lowering mechanism Safety lock for raising and lowering mechanism

1979-07-10

1981-07-07

Hershkovitz, Abraham

Expansible chamber devices

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

Means includes element interfitting between working member...

F15B 1526

Patent

active

042768144

ABSTRACT:
A main frame carries a movable part for raising and lowering by means of a hydraulic cylinder, and a blocking member is selectively movable into a position between the piston rod end of the cylinder and a stop on the movable part for preventing accidental descent of the movable part.

REFERENCES:
patent: 2258825 (1941-10-01), Thompson
patent: 2512150 (1950-06-01), Geren
patent: 3982648 (1976-09-01), Luedtke
patent: 4039093 (1977-08-01), Schmitz, Jr.
patent: 4073345 (1978-02-01), Miller
patent: 4122758 (1978-10-01), Bieringer
patent: 4187624 (1980-02-01), Blau

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