US PATENT SUBCLASS 123 / 510
.~ Fuel flow regulation between the pump and the charge-forming device

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

434  DF  CHARGE FORMING DEVICE (E.G., POLLUTION CONTROL) {29}
510.~ Fuel flow regulation between the pump and the charge-forming device {5}
511  DF  .~.~> Regulator means adjusts fuel pressure {2}
514  DF  .~.~> Excess fuel returned to tank
515  DF  .~.~> Regulator controls flow of a plurality of fuels
516  DF  .~.~> Air or fuel vapor purging system
517  DF  .~.~> Carburetor float bowl drain

DEFINITION

Classification: 123/510

Fuel flow regulation between the pump and the charge-forming device:

(under subclass 434) Subject matter having regulator means located in a fuel flow path between a pump discharge and a charge-forming device (e.g., carburetor) to modify or control the fuel pressure or rate of flow to said device.

(1) Note. The device may be a simple pressure-regulating valve controlled by a spring or a regulator controlled by engine parameters.

SEE OR SEARCH CLASS

137, Fluid Handling,

455+, for pressure regulators and flow-regulating devices, per se.

261, Gas and Liquid Contact Apparatus,

34.1+, for condition-responsive control of fuel flow into a carburetor float bowl.