A drum cylinder unit includes a photoconductive drum and a flange member. The flange member includes a fixing portion fixed to an end of the photoconductive drum, a cylindrical portion which forms a hollow portion therein, a groove portion provided at an edge of the cylindrical portion, and a gear portion. The groove portion and the hollow portion open to an outside of an axial direction of the photoconductive drum.

A mounting assembly is provided, including: a drive coupler shaped to engage a coupling member on a shaft positionable within a container defining an aperture to allow passage of the shaft; and a funnel positioned within the aperture to receive the drive coupler and guide the drive coupler to the coupling member. The assembly provides ergonomic advantages as the user is not required to lift the drive to reach the aperture.

A gimbal joint may employ a plurality of wear sleeves, each disposed between a pin or pin receptive bore of a first structure and a corresponding bore or pin of a second structure and between another pin or bore of the second structure and a corresponding bore or pin of a third structure. Each of these structures may be adapted to rotate in a single plane, with one structure adapted to also tilt about a first axis, and one other structure adapted to tilt about a second axis. Each integral flanged wear sleeve may comprise a right circular hollow cylindrical body portion, which may be interiorly sized to be retained on one of the pins and externally sized to be retained in one of the pin receptive bores, and a flange portion may radiate from one end of the cylindrical body portion.

A gimbal joint may employ a plurality of wear sleeves, each disposed between a pin or pin receptive bore of a first structure and a corresponding bore or pin of a second structure and between another pin or bore of the first structure and a corresponding bore or pin of a third structure. Each of these structures may be adapted to rotate in a single plane, with one structure adapted to also tilt about a first axis, and one other structure adapted to tilt about a second axis. Each integral flanged wear sleeve may comprise a right circular hollow cylindrical body portion, which may be interiorly sized to be retained on one of the pins and externally sized to be retained in one of the pin receptive bores, and a flange portion may radiate from one end of the cylindrical body portion.

An end member disposed in an end portion of a columnar rotating body, comprising: a shaft member; and a bearing member to which the shaft member is attached, wherein the bearing member includes a rotating force transmission pin, a tubular body, and a pin holding portion, the shaft member includes a rotating shaft, a rotating force receiving portion, and a base end portion.

An articulating assembly, including a first member having a first end, a second member, and a first coupling shaft engaged with the first end of the first member and with the second member, wherein the first coupling shaft has a first coupling shaft axis, the first coupling shaft is rotatable relative to the second member about the first coupling shaft axis, wherein the first member is rotatable relative to the first coupling shaft about a swivel axis, and wherein the swivel axis is perpendicular to the first coupling shaft axis, thereby providing an articulating coupling between the first end of the first member and the second member. The articulating assembly may further include an articulating coupling between a second end of the first member and a third member.

A universal joint socket has a socket unit, a joint unit, multiple balls, and a collar. The socket unit has a cavity, multiple grooves and multiple ball holes. The joint unit has a spherical joint, and a pin inserted in the spherical joint. The spherical joint is placed inside the cavity of the socket unit with an elastic element inside for supporting the spherical joint, and two ends of the pin are located respectively on the grooves of the socket unit. The balls are respectively disposed in the ball holes of the socket unit for positioning the spherical joint. The collar is mounted around the peripheral wall of the socket unit and closes openings of the ball holes of the socket unit. The universal joint socket has a long operating life and can provide a large torque.

A multi-directional smooth damper includes a base including an inner cavity, two ends of the inner cavity defining openings, a first rotating portion, and a second rotating portion. A first end of the first rotating portion is rotated and disposed in the inner cavity of the base and a shape of the first end of the first rotating portion corresponds to a shape of the inner cavity. A second end of the first rotating portion passes through an opening of one end of the base. The first rotating portion is disposed at one end of the base having the opening and the inner cavity. A first end of the second rotating portion is rotated and disposed in an inner cavity of the first rotating portion. A grease layer is coated between a surface of the first rotating portion and the surface of the inner cavity of the base.

A universal joint configured to transfer rotational movement from a first shaft to a second shaft at an angle and method of manufacturing the same.

The present invention is an apparatus, system and method for use of a mud motor having a bearing assembly a transmission or coupling assembly, a power section, a rotor catch assembly, and a cross over sub-valve wherein the transmission assembly may have a torque and thrust transfer coupling with a safetied joint for contacting universal style joints.