Method and apparatus for protecting a cylinder of an hydraulic e

Details Method and apparatus for protecting a cylinder of an hydraulic e Method and apparatus for protecting a cylinder of an hydraulic e

1990-07-18

1991-12-31

Look, Edward K.

Expansible chamber devices

With removal conduit for liquid seepage from expansible chamber

921691, 73 405R, 73 492, F01B 3100

Patent

active

050761463

ABSTRACT:
Fluid is detected within a protective encasement of an hydraulic cylinder of an elevator by applying a low pressure to the interior of the encasement and sensing for the presence of fluid as a result of the application of the low pressure. If fluid is detected, a greater pressure is applied within the protective encasement to eliminate the detected fluid. The protective encasement, which may be pressurized, has a pressure input port, an evacuation port, and an evacuation tube which attaches to the fluid evacuation port and extends to a region within the encasement below the bottom of the cylinder.

REFERENCES:
patent: 1846299 (1932-02-01), Bristol
patent: 3320969 (1967-05-01), Gordon
patent: 3741075 (1973-06-01), Moseley et al.
patent: 3848765 (1974-11-01), Durkop
patent: 3885435 (1975-05-01), Cascio
patent: 3943717 (1976-03-01), Schexnayder

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