Booster pump and feeder for low-temperature-fluid comprising the same

摘要

A low-temperature-fluid boosting pump (101) comprising a cylinder block (123) in which a cylinder (126) is formed, a piston rod (122) arranged to be driven by a drive unit (111) that can be connected to a driving source, and a piston head (125) that is connected to the piston rod (122) and is reciprocably accomodated in a compression chamber (126a) of the cylinder (126), thereby being able to compress in operation a low-temperature fluid by one end surface of the piston head (125). The drive unit (111) is disposed on the side of the one end surface of the piston head (125) such that a shank of the piston rod (122) is subjected to a tensile force in a direction in which the shank extends when the piston rod (122) is driven to compress the low-temperature fluid.