Safety lock device for lifts

Details Safety lock device for lifts Safety lock device for lifts

1975-10-03

1977-05-17

Blunk, Evon C.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

2481882, 248356, 403104, 403374, B66F 728

Patent

active

040236498

ABSTRACT:
A safety lock device for lifts or the like includes a pair of elongated inner and outer members. The inner member is movable longitudinally relative to the outer member between a retracted position and a plurality of extended positions. The lock device includes friction brake means carried by the inner member for automatically locking the inner member against movement toward its retracted position from any extended position. The brake means provides free extending movement of the inner member from its retracted position to its extended positions. A selectively operable releasing means is movable from a brake armed position to a brake releasing position for providing movement of the inner member from any of its extended positions to its retracted position. Operating means automatically move the releasing means to its brake armed position upon movement of the inner member from its retracted position toward its extended positions.

REFERENCES:
patent: 453865 (1891-06-01), Johnson
patent: 2684129 (1954-07-01), Jaseph
patent: 2956644 (1960-10-01), Green
patent: 3228647 (1966-01-01), Musianowycz
patent: 3833091 (1974-09-01), Mac Pherson

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