US PATENT SUBCLASS 123 / 461
.~.~.~.~ Having vapor returned to tank or pump inlet

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
445  DF  .~ Fuel injection system {5}
446  DF  .~.~ Fuel pump flow regulation {4}
457  DF  .~.~.~ Regulating means adjusts fuel pressure {9}
461.~.~.~.~ Having vapor returned to tank or pump inlet

DEFINITION

Classification: 123/461

Having vapor returned to tank or pump inlet:

(under subclass 457) Subject matter including means to recycle fuel vapor to the fuel tank or to the inlet of the fuel pump.

(1) Note. The vapor returned means may or may not be part of the pressure regulator.