Pump or motor

摘要: A positive displacement device, which can serve as a pump or motor, has rotor (14) and at least one stator (22). The have opposing, undulating surfaces (16 23) presenting alternating lobes (18) valleys (20) cooperate with another to form variable volume chambers when the stators move relative in first direction reciprocate second is transverse direction. may rotate of rotation. be splined shaft (10) so rotated by, rotate, while reciprocating back forth on shaft.