Pit buffer assembly for high speed elevators

Details Pit buffer assembly for high speed elevators Pit buffer assembly for high speed elevators

1992-07-15

1993-08-24

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 75, 187 77, 187 67, B66B 516

Patent

active

052380882

ABSTRACT:
The cab or counterweight pit buffer for an elevator system includes a cross beam disposed in the pit below the ground floor landing for the elevator. The cross beam is mounted on the cab or counterweight guide rails by means of safety brakes which will allow limited and controlled downward movement of the cross beam when a downwardly directed force is exerted on it. The cross beam carries at least one plunger-type spring or oil buffer on its upper surface for initial engagement with the cab or counterweight in the event the latter must be stopped by the pit buffer. The majority of the braking force for the descending cab or counterweight is provided by the safety brakes on the buffer cross beam. The buffer assembly is particularly adapted for high speed elevator systems.

REFERENCES:
patent: 249076 (1881-11-01), Moulton
patent: 568345 (1896-09-01), Gilpin et al.
patent: 692888 (1902-02-01), Moses
patent: 3759349 (1973-09-01), Sieffert

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