Motors: expansible chamber type – Relatively movable working members with one having motive... – One working member forms movable chamber for another
Patent
1988-08-24
1990-12-11
Look, Edward K.
Motors: expansible chamber type
Relatively movable working members with one having motive...
One working member forms movable chamber for another
91512, 91516, 91519, 92 52, 92 53, F01B 720
Patent
active
049761870
ABSTRACT:
Power fluid from a pump are provided through one power fluid branch conduit to an extend port for activating the smallest cylinder of a multi-stage packing cylinder and fluid is conducted through a second extend branch conduit to a second port which provides fluids to the larger cylinders of the packing cylinder. A normally closed sequence value is in the second branch conduit. When the pump first is activated, fluid goes through the first extend branch conduit to extend the smallest stage of the packing cylinder. When the smallest stage is fully extended or reaches resistance, the pressure in the pump output conduit rises. When this pressure reaches a preselected value, the sequence valve is opened and high pressure fluid is directed through the second branch conduit and second port to provide power fluid to the larger cylinders of the packing cylinder.
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Crane Carrier Company
Look Edward K.
Ryznic John E.
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