Patent ID: 7004117

Claim:
A fuel pump assembly for a combustion engine, comprising: a pump housing, a hollow mounting arm connected to said pump housing configured for mounting to a combustion engine for supporting said fuel pump assembly on said combustion engine, said pump housing having a longitudinal axis and a curved exterior surface substantially co-axial with respect to said longitudinal axis, a flexible diaphragm in said pump housing, a diaphragm actuator in said hollow mounting arm for reciprocating said diaphragm positioned in said pump housing, said diaphragm extending substantially normal to said longitudinal axis and having a central portion movable substantially parallel to said longitudinal axis in response to the movement of said diaphragm actuator, said pump housing including a plurality of heat transfer fins extending externally of said pump housing and oriented parallel to said diaphragm, so that air tends to be guided by said fins about the pump housing, a plurality of heat transfer fins extending externally of said hollow mounting arm for exchanging heat with the atmosphere and reducing the transfer of heat from the combustion engine through the hollow mounting arm to the pump housing to reduce the likelihood of vaporization of fuel moved through the fuel pump.