Pumps – Condition responsive control of drive transmission or pump... – Having condition responsive pumped fluid control
Reexamination Certificate
2005-11-08
2005-11-08
Freay, Charles G. (Department: 3746)
Pumps
Condition responsive control of drive transmission or pump...
Having condition responsive pumped fluid control
C417S302000, C417S304000, C417S308000
Reexamination Certificate
active
06962485
ABSTRACT:
A fuel metering unit for controlling a variable displacement pump including a main metering valve in fluid communication with the pump for metering an output of the pump, a pressure regulator in fluid communication with the metering valve to create a spill return and a control valve in fluid communication with the pressure regulator and the pump for regulating the spill return flow so the spill return flow is maintained substantially constant at a low level to minimize the heat generated by recirculation by setting a displacement of the pump.
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Acopyof the International Search Report dated Dec. 1, 2004, issued in corresponding international application No. PCT/US04/11368, filing date Apr. 13, 2004.
Acopyof the Written Opinion dated Dec. 1, 2004, issued in corresponding international application No. PCT/US04/11368, filing date Apr. 13, 2004.
Bennett George L.
Dalton William H.
Zagranski Raymond D.
Chaclas, Esq. George N.
Edwards & Angell LLP
Freay Charles G.
Goodrich Pump and Engine Control Systems, Inc.
Wofsy, Esq. Scott D.
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