Fuel pump
AssigneeCrane Co.
InventorsThomas Sailer, Kenneth M. Beligoy
Life of this patent
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Abstract
A fuel pump includes an O-ring seal to provide sealing contact with a diaphragm seal between a valve housing and associated valve cover interface despite some loss of clamping load between such mating parts. Also, a molded O-ring type ladder seal is used to maintain seal integrity between the valve housing and associated pump housing interface despite some loss of clamping load therebetween. Machined O-ring grooves are desirably provided in opposite sides of the valve housing to accommodate the O-ring against the diaphragm seal and the molded O-ring type ladder seal against the pump housing.
Claims15
A fuel pump comprising a pump housing having a pump inlet and pump outlet, a pumping element in said pump housing for pumping fuel entering said pump inlet to said pump outlet, a valve housing having one side in mating engagement with said pump housing, said valve housing containing a bypass valve for directing any excess fuel from said pump outlet back to said pump inlet, a valve cover in mating engagement with another side of said valve housing opposite said one side, a diaphragm seal between said valve cover and said valve housing, an O-ring groove in said another side of said valve housing containing an O-ring in sealing engagement with said diaphragm seal to prevent leakage of fuel between said valve cover and said valve housing, and another seal between said valve housing and said pump housing to prevent leakage of fuel therebetween.
A fuel pump comprising a pump housing having a pump inlet and pump outlet, a pump element in said pump housing for pumping fuel from said pump inlet to said pump outlet, a valve housing containing a bypass valve for directing any excess fuel from said pump outlet back to said pump inlet, a valve cover in mating engagement with said valve housing, a diaphragm seal between first and second mating surfaces of said valve housing and said valve cover, respectively, one of said first and second mating surfaces having an O-ring groove containing an O-ring in sealing engagement with said diaphragm seal to aid in preventing leakage of fuel between said first and second mating surfaces.
Dependencies are inferred from the claim text.