Patent ID: 7083395

Claim:
A pump assembly coupleable to a source of liquefied gas, the pump assembly comprising: a pump module having a pump driver; a cooling assembly positioned generally adjacent to the pump module, the cooling assembly having a converging pump head receiving aperture, the cooling assembly having a fluid inlet line and a fluid outlet line in fluid communication with the source of liquefied gas and in fluid communication with the pump head receiving aperture; and a pump head assembly removably retained in the pump head receiving aperture, a portion of the cooling assembly being intermediate the pump head assembly and the pump module, the pump head assembly having a converging shape and being sized to engage the cooling assembly in a wedged configuration when the pump assembly is in an installed position in the cooling assembly, the pump head having a fluid inlet pathway abutting in direct sealable engagement with the fluid inlet line of the cooling assembly, and having a fluid outlet pathway abutting in direct sealable engagement with the fluid outlet line of the cooling assembly, the pump head assembly being operably coupled to the pump driver of the pump module to provide a flow of the liquefied gas from the fluid inlet line, through the pump head assembly, and to the outlet line.