INTERNAL GEAR PUMP AND INTERNAL GEAR PUMP UNIT

摘要

Provided is an internal gear pump in which, while a cover and a casing are made of a resin, no breakage occurs when the cover and casing are fastened, and which demonstrates stable discharging performance. Provided is an internal gear pump 1 wherein at least portions of a casing 5 and a cover 6 which are to be joined together are each formed from an injection molding body of a resin composition, the casing 5 and the cover 6 are fixed, the casing 5 and the cover 6 are in contact with each other without any gap in a bolt fixing portion 13 of the two members, a recess closing portion 12 between the casing 5 and the cover 6 has a gap between the two members, and this gap is sealed with a rubber ring 10 provided on the outer periphery of a trochoid accommodating recess 7.