Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1981-01-21
1984-12-25
Hershkovitz, Abraham
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91517, 91518, 91445, F15B 13042
Patent
active
044896433
ABSTRACT:
A safety circuit for preventing uncontrolled descent of a hydraulically supported load, in the event of a leak, comprises parallel hydraulic pressure feed lines, control valves in these, and means responsive to a difference in pressure between the lines and arranged to close the valves when such a pressure difference is detected. The valves are provided adjacent to a lifting cylinder or cylinders and close to the pressure source, so as to prevent spillage of hydraulic fluid as well as to prevent descent of the supported load.
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Schedler Heinz
Spielvogel Harry
Hershkovitz Abraham
SMS Schloemann--Siemag Aktiengesellschaft
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