Abstract: Progressing cavity devices and systems are provided. In one embodiment, a system includes a metal stator of a progressing cavity device. The metal stator includes metal plates with apertures that are rotationally offset to form a winding rotor cavity. At least one of the apertures that form the winding rotor cavity has an elongated profile with enlarged ends having widths greater than that across the middle of the at least one aperture. Additional systems, devices, and methods are also disclosed.

Abstract: Progressing cavity devices and systems are provided. In one embodiment, a system includes a metal stator of a progressing cavity device. The metal stator includes metal plates with apertures that are rotationally offset to form a winding rotor cavity. At least one of the apertures that form the winding rotor cavity has an elongated profile with enlarged ends having widths greater than that across the middle of the at least one aperture. Additional systems, devices, and methods are also disclosed.

Abstract: A progressing cavity stator and a method for fabricating such a stator are disclosed. The progressing cavity stator includes first and second elastomer layers fabricated from corresponding first and second elastomer materials. The first and second elastomer materials are selected to have at least one distinct material property. Exemplary embodiments of this invention may reduce tradeoffs associated with elastomer material selection and may further address the heat build up and subsequent elastomer breakdown in the lobes of prior art stators.

Abstract: A progressing cavity stator and a method for fabricating such a stator are disclosed. Exemplary embodiments of the progressing cavity stator include a plurality of rigid longitudinal stator sections concatenated end-to-end in a stator tube. The stator sections are rotationally aligned so that each of the internal lobes extends in a substantially continuous helix from one end of the stator to the other. The stator further includes an elastomer liner deployed on an inner surface of the concatenated stator sections. Exemplary embodiments of this invention include a comparatively rigid stator having high torque output and are relatively simple and inexpensive to manufacture as compared to prior art rigid stators.

Abstract: A multi-disc brake assembly having a plurality of interleaved stator and rotor brake discs that are cooperative with a cylindrically shaped or cone shaped heat shield that has a honeycomb open cell structure which controllably limits the radiant and convection heat energy transfer out and away from the brake discs on frictional engagement and generation of heat therefrom.