Shock absorbers for elevators

Details Shock absorbers for elevators Shock absorbers for elevators

1975-08-19

1977-04-05

Cherry, Johnny D.

Spring devices

Fluid

Expansible-contractible chamber device

187 67, 188287, 188322, 267 65R, B66B 528, F16F 948

Patent

active

040158357

ABSTRACT:
A shock absorber for use in elevators comprising a hollow piston rod connected to a piston which is movable within a cylinder filled with a fluid and having apertures in the cylinder wall for communication with a surrounding cylindrical expansion chamber and means for providing fluid communication with the interior of said piston rod. The hollow piston is forced into the cylinder during operation of the shock absorber thereby forcing fluid into both the cylindrical expansion chamber and the interior of the piston rod.

REFERENCES:
patent: 986378 (1911-03-01), Furlow
patent: 1494135 (1924-05-01), Robison et al.
patent: 1658962 (1928-02-01), Aikens
patent: 2744587 (1956-05-01), Beck
patent: 3148869 (1964-09-01), Peterson
patent: 3693767 (1972-09-01), Johnson
patent: 3788433 (1974-01-01), Katsumori
patent: 3918693 (1975-11-01), Zahid

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