Sickleless internal gear pump with sealing elements inserted in the tooth heads

A sickleless internal gear pump, comprising:

• an internal ring gear and a pinion meshing with said ring gear, said internal ring gear and pinion having a common width and a plurality of teeth extending across said width, each said tooth having a tooth head with an involute profile, each said pinion tooth head being substantially the same each said ring gear tooth including a tooth head having an end face, a slot and a sealing element disposed in said slot, said sealing element radially movably disposed in said slot, said end face consisting of said sealing element, said end face having an exterior profile which is substantially identical to said involute profile of each said ring gear tooth head, each said sealing element comprising a stop surface and a fixed stop, each said slot having a shape corresponding to and coacting with said stop surface and said fixed stop for limiting said radial movement of said sealing elements, said ring gear having a plurality of radial ports;
• and
• a housing rotatably carrying said internal ring gear and said pinion, said housing having a suction port, a pressure port and an axial expanse corresponding to said teeth width.