Hydraulic tie-down for elevators

Details Hydraulic tie-down for elevators Hydraulic tie-down for elevators

1983-10-20

1985-06-11

Rolla, Joseph J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 1A, 254277, 104196, 188280, B22B 1104

Patent

active

045222851

ABSTRACT:
A compensating rope sheave tie-down uses a hydraulic control system comprising various valves to control sheave motion. The sheave is permitted by the control system to move up and down slightly at slow rates, but is held in place if a high rate occurs. The control also permits the sheave to drop down to apply tension to the compensating rope.

REFERENCES:
patent: 1132761 (1915-03-01), Boening
patent: 1864588 (1932-06-01), Dunlop
patent: 4236695 (1980-12-01), Morrison
patent: 4395178 (1983-07-01), MacDonell et al.
patent: 4470355 (1984-09-01), Kunczynski
patent: 4480729 (1984-11-01), Porter

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