Smith, Gambrell & Russell, LLP
Internal gear pump
An internal gear pump includes an outer rotor, an inner rotor, and a pump housing. The inner rotor is rotatably disposed inside the outer rotor having internal teeth, forms pump chambers between the outer rotor and the inner rotor, and has external teeth. The pump housing has an inhalation port, a discharge port, and a first notch formed within a first land surface that extends from an end of the inhalation port to an end of the discharge port. The first notch is formed along a projection trajectory obtained by projecting a trajectory of chip points on the first land surface, where each chip point is a middle point between a corresponding one of the internal teeth and a corresponding one of the external teeth at a location at which the internal and external teeth substantially face each other above the first land surface and are closest to each other.
SUBARU CORPORATION
F F F F F
F04C F04C F04C F16H F04C
inventional inventional additional inventional additional
Katsuyuki Atsushi Shinya Makoto
Namiki Fujie Horie Saito