Abstract: A stator assembly is provided for use in a progressing cavity pump. The assembly includes a tubular pump barrel in which are slidably positioned a plurality of cup-like spacers. Each spacer has a tubular wall, an inlet end with an internal annular flange and an outlet end defined by a circumferential edge of the tubular wall. An elastomeric stator segment is housed in each spacer. Each stator segment has adjacent an outlet end thereof a circumferential external lip portion and has a contoured cavity therethrough generally coaxial with the pump barrel and adaptable to rotatably receive a progressing cavity pump rotor therein. The lip portion of each stator segment is captured between a spacer outlet end circumferential edge and the next adjacent spacer annular flange portion so that the elastomeric stator segments are retained in serial position within the pump barrel by the spacers permitting the spacers and stator segments to be easily removed from the pump barrel for repair and replacement.

Abstract: A sewage grinder pump system for use in moving sewage, having a vertically oriented cylindrical pump motor housing, a bottom plate affixed to and closing the pump motor housing, a motor supported by the bottom plate within the pump motor housing, the motor having a shaft extending through an opening in the bottom plate, a grinder pump supported to a lower end of the bottom plate and connected to the motor shaft, a closure member affixed to the pump motor housing top end and having a level detector receiving portion providing a liquid level detector opening therein externally of the pump motor housing, an elongated liquid level detector having an upper end received within the liquid level detector opening, and a circuit connecting the liquid level detector to control the motor to thereby drive the grinder pump in response to detected liquid level.