Recirculating valve

Details Recirculating valve Recirculating valve

2011-07-05

2011-07-05

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Heat or buoyancy motor actuated

C251S149000, C123S464000, C123S514000, C123S557000

Reexamination Certificate

active

07971849

ABSTRACT:
A recirculating valve according to the present invention comprises a fuel supplying passage in fluid communication with a fuel tank and an engine, a return passage in fluid communication with the engine and the fuel tank, a communication passage in fluid communication with the fuel supplying passage and the return passage. A temperature sensitive displacement portion that is provided in the fuel supplying passage and displaces in accordance with the fuel temperature. An on-off valve closes the communication passage when the fuel temperature in the fuel supplying passage is above a first prescribed temperature, and opens the communication passage when the fuel temperature in the fuel supplying passage is below a second prescribed temperature, in accordance with a displacement of the temperature sensitive displacement portion.

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