Abstract: A pump or motor having a three-lobed rotor capable of being used within a hypocycloidal two-lobed stator that is designed primarily for use with a one-lobed rotor. The three-lobed rotor design allows for interchangeability with the two-lobed stator to provide for varying fluid displacements to meet particular demands. A specific application allows for the combination of both the three-lobed rotor along with a one-lobed rotor within the same two-lobed stator, thereby improving the efficiency of the pump or motor.

Abstract: A progressing cavity pump having a rotor with a longitudinal bore and including at least one helix is mounted eccentrically within a stator having at least two helices. In a first embodiment the rotor is driven by an eccentric drive shaft which shares a journal surface with the rotor bore along the entire length of the rotor. In the second and third embodiments, the rotor is driven by a drive shaft concentric with the stator which drives a drive block having a bore that is eccentric relative to the stator. A rotor hub is rotatably mounted within the drive block bore. The drive shaft additionally drives a longitudinal auxiliary shaft within the longitudinal bore of the rotor. The auxiliary shaft is fixedly coupled to a second drive block which drives the rotor head. As external rotational actuation is applied to the drive shaft, the drive block rotates, acting as a crank on the rotor hub to drive the rotor.

Abstract: A progressing cavity pump having a rotor with a longitudinal bore and including at least one helix is mounted eccentrically within a stator having at least two helices. In a first embodiment the rotor is driven by an eccentric drive shaft which shams a journal surface with the rotor bore along the entire length of the rotor. In the second and third embodiments, the rotor is driven by a drive shaft concentric with the stator which drives a drive block having a bore that is eccentric relative to the stator. A rotor hub is rotatably mounted within the drive block bore. The drive shaft additionally drives a longitudinal auxiliary shaft within the longitudinal bore of the rotor. The auxiliary shaft is fixedly coupled to a second drive block which drives the rotor head. As external rotational actuation is applied to the drive shaft, the drive block rotates, acting as a crank on the rotor hub to drive the rotor.

Abstract: An orifice motor which includes a plurality of spaced-apart rotors positioned along a shaft and enclosed within a casing or housing. Each rotor includes at least one jet orifice thorugh which fluid passes and is ejected tangentially to the peripheral surface of the rotor. The apparatus also includes a high pressure fluid inlet at a first end of the shaft, and a plurality of exit ports together with an exit chamber at a second end of the shaft. Bearings and seals are employed to protect frictionally related surfaces. Fluid is injected into one end of the apparatus and travels axially through the apparatus, passing through each of the rotors by way of the orifices. As the fluid exits the orifices, a pinwheel effect is created which causes the rotors to spin, thus causing the attached shaft to spin. As fluid exits each rotor, it is introduced to the next rotor downstream, where it exits in the same way.

Abstract: An Oldham type coupling including first and second end coupling members rotatable about relative parallel axes and an intermediate coupling member. The intermediate coupling member is connected to the first end coupling member for relative translatory movement along a first path radially of the first end coupling member by a first set of rollers that transmit torque and by a second set of rollers that transmit end thrust between the intermediate and first end coupling member. The intermediate coupling member is connected to the second end coupling member for relative translatory movement along a second path radially of the second end coupling member and crosswise of the first path by a third set of rollers that transmit torque and by a fourth set of rollers arranged to transmit end thrust between the intermediate and second end coupling members.