Wedge braking system for multi-stage lifts

Details Wedge braking system for multi-stage lifts Wedge braking system for multi-stage lifts

1994-04-18

1997-07-08

Poon, Peter M.

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific means contacting or on load support for...

Includes movable contact component on support for engaging...

188189, 188136, 187226, 182148, B60T 872, B66B 512

Patent

active

056451423

ABSTRACT:
Apparatus for braking relative vertical movement between two vertical members includes a ramp mounted on one of the members to oppose a vertical face on the other. If the ramp member accelerates downwardly a wedging roller is wedged between the ramp and the vertical face. This roller is on a slide rod which normally compresses a spring carried at the bottom of the ramp, but downward acceleration on the ramp results in expansion of the spring and movement of the wedging roller into wedging position to stop the acceleration.

REFERENCES:
patent: 186241 (1877-01-01), Fogg
patent: 859718 (1907-03-01), Abbott
patent: 3752261 (1973-08-01), Bushnell, Jr.
patent: 4015686 (1977-04-01), Bushnell, Jr.

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