US PATENT SUBCLASS 417 / 307
.~ Pressure responsive relief or bypass valve

Current as of: June, 1999
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417 /   HD   PUMPS

279  DF  WITH CONDITION RESPONSIVE PUMPED FLUID CONTROL {22}
307.~ Pressure responsive relief or bypass valve {4}
308  DF  .~.~> Having additional relief or bypass valve
309  DF  .~.~> Responsive to pump inlet condition
310  DF  .~.~> Rotary expansible chamber pump
311  DF  .~.~> Adjustable spring loaded valve

DEFINITION

Classification: 417/307

(under subclass 279) Apparatus in which the fluid flow control means controls a bypass or relief line.