Parker-Hannifin Corporation

David Jonathan Sandy

Yu-Sen James Chu

Thomas Sailer

Lori Ann DiLisi

A fuel pump includes a cartridge removably received within a canister. The cartridge includes a motor assembly, and a pump assembly that includes a centrifugal pumping element and outlet porting from the centrifugal pumping element. The motor drives the centrifugal pumping element to generate a flow of fluid through a main flow pathway between a pump inlet and outlet through the outlet porting of the pump assembly. The cartridge further includes a pressure relief valve that is movable between a closed position and an open position, and defines a pressure relief flow pathway integrally within the cartridge from the outlet porting to inlet porting of the centrifugal pumping element. When pressure within the pump assembly exceeds a threshold pressure, the pressure relief valve moves from the closed position to the open position to permit a relief flow of fluid through the relief flow pathway. The fuel pump may be employed as part of an aircraft fuel system.

Integral pump pressure relief valve

A flame arrestor for a fuel pump having housing extending intermediate an upstream end defining an inlet port and a downstream end defining an outlet port coupled in fluid communication with the outlet port along a fluid flow path. The fuel pump further has a motor operably coupled to a pumping element. The arrestor is provided as a body received within the housing intermediate the outlet port and the motor. The arrestor body, which is formed of an open-cell foam material having an average pore size and thickness selected as being both fluid permeable and adapted to prevent an ignition source from propagating therethrough, is disposed in the fluid flow path such that fuel from the pumping element tank may be pumped to the outlet port through the body with the ignition source being prevented from passing into the outlet port.

Flame arrestor system for fuel pump discharge

A flame arresting system for a centrifugal fuel pump of a variety including a downstream impeller and an upstream inlet port. The system includes an arrestor body which is received with the inlet port within an associated fuel tank. The body is formed of an open-cell foam material having an average pore size and thickness selected as being both fluid permeable and adapted to prevent flame from propagating therethrough. The inlet port is contained within the body such that fuel within the fuel tank may be drawn into the inlet port through the arrestor body, with flame being prevented from passing into the tank from the inlet port.

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Avon, OH, United States of America

David Jonathan Sandy