Safety arrester for arresting a hydraulically operated lifting r

Details Safety arrester for arresting a hydraulically operated lifting r Safety arrester for arresting a hydraulically operated lifting r

1974-06-27

1976-12-07

Schwadron, Martin P.

Expansible chamber devices

With releasable stop or latch means to prevent movement of...

Means includes element interfitting between working member...

91 44, 92 24, 92 60, 188 67, 188170, F15B 1526

Patent

active

039955346

ABSTRACT:
A safety arrester for arresting a hydraulically operated lifting ram of a hydraulic elevator comprises an arrester body within which a plurality of brake shoes are located. The brake shoes are segments of a ring around a passage through the arrester body for receiving the ram, are spring biassed into frictional engagement with the ram, and are displaceable out of engagement with the ram by hydraulic actuator means.

REFERENCES:
patent: 294086 (1884-02-01), Sickels
patent: 2377032 (1945-05-01), Osborne
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patent: 2815736 (1957-12-01), Wright
patent: 2889895 (1959-06-01), Snow
patent: 3173257 (1965-03-01), Lucien
patent: 3203513 (1965-08-01), Allen
patent: 3230784 (1966-01-01), Von Heidenstam et al.
patent: 3420144 (1969-01-01), Berry
patent: 3470793 (1969-10-01), Hanchen
patent: 3556259 (1971-01-01), Allen
patent: 3575087 (1971-04-01), Sherwood

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