Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1980-03-06
1982-06-15
Freeh, William L.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
417222, F04B 126
Patent
active
043348327
ABSTRACT:
A variable displacement rotary pump includes a tiltable cam plate which varies the pump displacement as a function of the fluid pressure in a control chamber. The pump pumps fluid to a fluid motor via an orifice in an outlet passage. A spool valve meters fluid to the control chamber in response to the differential pressure across the orifice. Pressure on one side of the orifice acts upon the spool valve in a feedback chamber remote from the outlet passage. The orifice is defined by an annular space between the wall of the outlet passage and neck portion of the spool valve. A feedback passage in the spool valve communicates fluid pressure from the one side of the orifice to the feedback chamber. A leakage flow path extends through a bearing to provide for automatic bearing lubrication.
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Brown Arthur K.
Ewald Jerome T.
Hendrickson Richard T.
Decker Ken C.
Freeh William L.
Schoenle Paul David
The Bendix Corporation
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