Emergency brake for rack and pinion hoist

Details Emergency brake for rack and pinion hoist Emergency brake for rack and pinion hoist

1974-10-24

1976-07-06

Schacher, Richard A.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 67, 187 68, 187 89, B66B 504, B66B 516, B66B 528

Patent

active

039677036

ABSTRACT:
A rack-and-pinion type hoist has an improved braking apparatus that includes a spring buffer, preferably hydraulic, carried by the cage of the hoist, a rotatable shaft also carried by the cage and positively engaged with a member extending along the mast so as to be driven in rotation by movement of the cage along the mast and connecting means for engaging the shaft and the buffer comprising a centrifugal governor driven by rotation of the shaft and operating, in response to rotation of the shaft in excess of a pre-determined rate of rotation, to provide positive drive to a linearly movable member, the movement of which is opposed by the buffer.

REFERENCES:
patent: 716949 (1902-12-01), Slevin
patent: 755736 (1904-03-01), Blanding
patent: 805818 (1905-11-01), Regina
patent: 839327 (1906-12-01), Small
patent: 885560 (1908-04-01), Worthington
patent: 950477 (1910-03-01), Courtois
patent: 1169015 (1916-01-01), Drawbaugh
patent: 1196260 (1916-08-01), Mayfield
patent: 1844133 (1932-02-01), Maniscalco

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