Priming pump valve
AssigneesDavco Manufacturing Corporation, Dapco Industries, Inc.
InventorsStephen D. Davis, Willis E. Tupper
Life of this patent
Estimating the term…
Abstract
A priming pump valve for use in conjunction with a fuel system, such as a diesel engine, that does not result in a lag in the fuel flow during normal system operation. The priming pump valve has a control valve movable between a first position for normal operation and a second position for priming that allows for efficient priming of the fuel system when in the priming mode and unrestricted flow of fuel during normal operation of the engine.
Claims6
In a fuel system for a diesel engine of the type having a fuel tank and a fuel line connecting the fuel tank to the diesel engine, the improvement comprising:
- a housing having an operational flow path which forms a portion of said fuel line during a normal operation of said diesel engine;
- means defining a priming flow path for providing a flow of fuel to said engine during a priming operation;
- control valve means in said operational fluid flow path for selectively directing fuel flow to one of said operational and priming flow paths and closing communication to the other of said flow paths;
- said priming flow path having its inlet at said valve control means and an outlet opening into said operational flow path downstream from said control valve means;
- and
- pumping means carried by said housing and in communication with said fuel line via said control valve means for drawing fuel into said priming flow path and releasing said fuel into said operational flow path when said control valve means is connecting said fuel line to said priming flow path.
Dependencies are inferred from the claim text.