Abstract: An improved, panel-mounted fuel reserve valve for a recreational vehicle fuel system. The valve body is molded plastic with a cruciform-symmetrical arrangement of throughbores defining the fuel inlets, the fuel outlet and a valve bore for receiving an internal valve assembly. In the illustrated embodiment the fuel inlets are coaxial, the fuel outlet and the valve bore are coaxial, and the internal valve assembly includes a ball valve element which mates with O-ring type seals associated with the fuel inlets. In a preferred form the valve includes molded hose connectors inserted in the fuel inlets, the hose connectors having valve seat portions which define retainers for the O-rings to hold them firmly and precisely against the ball valve element in the valve body. The invention is also a method for achieving the inventive valve body structure with little or no "flash" or injection leakage which would affect the valve sealing tolerances inside the valve body.

Abstract: The present invention is a fuel primer pump capable of manually injecting fuel into the carburetor of an internal combustion engine, and is adapted to include both enrichment and shut-off positions. The primer pump includes a housing sealed at one end by an end cap which defines inlet and outlet openings. An internal piston is disposed within the housing for manual pumping of fuel. A relatively free floating valve pin, mounted on the internal piston, prevents an unwanted flow of fuel through the primer pump when the pump is disposed in the shut-off position. The valve pin is slidably retained within a cavity in the piston which opens onto the face of the piston proximate the end cap defining the outlet passageway. The valve pin is spring biased toward the outlet passageway and centers itself in the passageway seat due to the free floating nature thereof. The valve pin becomes disengaged from the seat when the primer pump is placed in the enrichment position, allowing the flow of fuel through the primer pump.