A shaft coupling for connecting an upper shaft with a lower shaft within a pumping system is designed to handle a large tensile load between the upper and lower shafts. In some embodiments, the upper shaft includes a shaft ring groove and the coupling has a body and a first receiving chamber within the body that receives an end of the upper shaft. The coupling also includes an upper internal groove extending into the body from the first receiving chamber and an upper split ring that is configured to be compressed into a position occupying both the upper internal groove and the shaft ring groove of the upper shaft. Set screws compress the upper split ring into the shaft ring groove of the upper shaft. In another embodiment, the coupling includes a plurality of locking screws that extend through the body into corresponding lock screw grooves in the upper and lower shafts.

A torque tube coupler may include an outer body that includes a first abutting surface and a second abutting surface adjacent to the first abutting surface. Set screws may be inserted into one or more channels of the first abutting surface. Tightening the set screws may force the abutting surfaces away from each other and the outer body to press against an inner surface of a torque tube. Another embodiment of the torque tube coupler may include a central ring sized based on a size of a torque tube. The torque tube coupler may also include a set of fingers that extend away from a first side of the central ring and are shaped to flex radially outward. The torque tube coupler may include a core disposed within the set of fingers that, when drawn towards the central ring, causes the fingers to flex radially outwards.

A system for transferring torque with zero lash from a driver to a driven object is provided. The system includes a shaft disposed about a rotational axis and a hub defining a bore that receives the shaft. The shaft and hub are each configured for coupling to one of the driver and driven object. The shaft defines a flat on a radially outer surface and the hub defines a flat on a radially inner surface opposing the flat in the shaft. In one embodiment, the shaft includes a threaded bore and the hub includes an aligned through bore. Rotation of a threaded fastener in the bores draws the flat into engagement. In another embodiment, the hub includes a threaded through bore. Rotation of a fastener extending through the bore and engaging the shaft diametrically opposite the flats urges the flats into engagement.

A prosthetic device having a rotatable pyramid and lateral travel limit is provided. A first member has a first end connectable to a prosthetic component and a second end with a bar having sides and a distal face. The distal face has ribs thereon. A central hole is provided through the first member. A second member has a first end with a pyramid and a second end with a ring that defines a recess with a solid face. A third member has a dome on a first end and a channel on the second end. The pyramid extends through a central hole through the dome. A screw passes through the central hole of the first member wherein it can engage the second member within the recess. The lateral movement of the bar within the channel is bound by the screw contacting the second member.

A torque shaft, and couplings for connecting a progressing cavity pump and a driving part. The torque shaft, which accommodates the differing rotational motion of driver shaft and pump rotor, includes a shaft body and shaft heads both ends of the shaft body. The shaft heads have a transverse cross section of a hexagonal shape. An assembly for connecting a pump with a driving part which includes the above-mentioned torque shaft, a driver coupling, and a pump coupling and static components that connect the driving part housing to the progressing cavity pump stator. The connecting assembly includes provision for containing up thrust when the pump rotor rotation is reversed.

A first embodiment of a torque tube coupler may include an outer body that includes a first abutting surface and a second abutting surface adjacent to the first abutting surface. Set screws may be inserted into one or more channels of the first abutting surface. Tightening the set screws may force the abutting surfaces away from each other and the outer body to press against an inner surface of a torque tube. Another embodiment of the torque tube coupler may include a central ring sized based on a size of a torque tube. The torque tube coupler may also include a set of fingers that extend away from a first side of the central ring and are shaped to flex radially outward. The torque tube coupler may include a core disposed within the set of fingers that, when drawn towards the central ring, causes the fingers to flex radially outwards.

A system for transferring torque with zero lash from a driver to a driven object is provided. The system includes a shaft disposed about a rotational axis and a hub defining a bore that receives the shaft. The shaft and hub are each configured for coupling to one of the driver and driven object. The shaft defines a flat on a radially outer surface and the hub defines a flat on a radially inner surface opposing the flat in the shaft. In one embodiment, the shaft includes a threaded bore and the hub includes an aligned through bore. Rotation of a threaded fastener in the bores draws the flat into engagement. In another embodiment, the hub includes a threaded through bore. Rotation of a fastener extending through the bore and engaging the shaft diametrically opposite the flats urges the flats into engagement.

A coupling system is configured to axially couple a motor shaft rotating in a motor housing to a gearbox shaft rotating in a gearbox housing. The coupling system has a set screw and a socket. The set screw couples the two housings together. The socket is configured to receive the set screw. The socket being configured to can slide in a first of the motor housing and the gearbox housing in a direction of a second of the motor housing and the gearbox housing under a thrust force of the set screw during tightening thereof, in order to press the socket against the second of the motor housing and the gearbox housing at a mating surface of the second of the motor housing and the gearbox housing, so as to eliminate any play between the second of the motor housing and the gearbox housing at the mating surface.

This invention uses disc shaped cams in enlarged hoes in machine feet to allow a machine to be moved and properly installed to the bedplate. Once the machine is in the proper location, the cams are locked into place with a set screw which prevents the cams from rotating and the machine from moving. The machine foot is then secured to the base by a washer and the manufacturer's specified anchor bolt is torqued to the proper value.

A blowout preventer including a top including a chamber and an annular groove extending into a surface of the top, a housing including a chamber and an annular groove extending into a surface of the housing, and a connection assembly configured to releasably couple the top to the housing, the connection assembly including an arcuate ring segment having a radial width that is greater in size than an axial height of the ring segment, and a positioner configured to radially displace the ring segment between a locked position restricting relative axial movement between the top and the housing, and an unlocked position allowing for relative axial movement between the top and the housing.