Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1981-02-26
1984-02-28
Garrett, Robert E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91517, 91518, B30B 932, F15B 1116, F15B 1306
Patent
active
044336128
ABSTRACT:
A hydraulic press has lowering and lifting cylinders, a controlled pressure-limiting valve connected to the high-pressure hydraulic supply, and a shuttle valve with its operating inlets connected respectively to the hydraulic supply and to the lifting cylinders and its outlet connected to the pressure-limiting valve to control it. Further valves responsive to a disturbance of hydraulic equilibrium in the hydraulic circuit operate switches controlling the hydraulic fluid supply.
REFERENCES:
patent: 2526646 (1950-10-01), Ericson
patent: 2611246 (1952-09-01), Ackerman
patent: 3333413 (1967-08-01), Mercier et al.
patent: 3824896 (1974-07-01), Tull
patent: 3850323 (1974-11-01), Ekstrom
patent: 3888168 (1975-06-01), Kent et al.
patent: 3942432 (1976-03-01), Cantine, Jr. et al.
patent: 4028997 (1977-06-01), Lang
Schedler Heinz
Spielvogel Harry
Garrett Robert E.
SMS Schloemann--Siemag Aktiengesellschaft
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