Constant bypass flow controller for a variable displacement...

Pumps – Condition responsive control of drive transmission or pump... – Having condition responsive pumped fluid control

Reexamination Certificate

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Details

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 Written Opinion dated Dec. 1, 2004, issued in corresponding international application No. PCT/US04/11368, filing date Apr. 13, 2004.

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