A universal joint is provided, including: a seat, including a receiving room extending in an axial direction and at least one through hole in communication with the receiving room; a connecting member, including a ball head rotatably received within the receiving room; and an assembling mechanism, including at least one blocking member and a sleeve member sleeved around the seat, the at least one blocking member being received within the at least one through hole and blockable with the ball head in the axial direction, the sleeve member covering the at least one through hole; wherein the seat has a first hardness, the sleeve member has a second hardness smaller than the first hardness, an outer circumferential wall of the seat is partially embedded within an inner circumferential wall of the sleeve member.

A surgical tool including a socket having a housing and an aperture within the housing, the socket configured to receive a ball and a pin at least partially in the aperture. The ball is positioned at least partially in the socket and configured to rotate within the socket, the ball comprising an elongated opening extending through the ball. The pin is coupled to the socket and disposed at least partially in the socket on opposite sides of the socket, the pin including a first longitudinal axis and extending through the elongated opening of the ball between opposite sides of the socket. The ball is configured to partially rotate about the first longitudinal axis of the pin, and partially rotate, about a second axis perpendicular to the first longitudinal axis of the pin, in a plane aligned with the elongated opening.

A device including a ball, cage housing the ball and a centering lug, wherein the centering lug has a generally annular form with a radially outer annular periphery and a radially inner annular periphery, the outer annular periphery is integral with the cage and the inner annular periphery is inserted in a groove in the outer periphery of the ball, and the centering lug is elastic and arranged to hold the ball along a predefined axis in a rest position.

In a socket assembly having a housing with a closed end and an open end and an axially slidable and rotatable bearing, a spring washer seated on the axially slidable and rotatable bearing with a protrusion or a recess on the external periphery for engagement with a cooperating recess or protrusion on an inner cavity of the housing to effectively stop movement of spring washer with the axially slidable and rotatable bearing during driving conditions.

A surgical tool including a socket having a housing and an aperture within the housing, the socket configured to receive a ball and a pin at least partially in the aperture. The ball is positioned at least partially in the socket and configured to rotate within the socket, the ball comprising an elongated opening extending through the ball. The pin is coupled to the socket and disposed at least partially in the socket on opposite sides of the socket, the pin including a first longitudinal axis and extending through the elongated opening of the ball between opposite sides of the socket. The ball is configured to partially rotate about the first longitudinal axis of the pin, and partially rotate, about a second axis perpendicular to the first longitudinal axis of the pin, in a plane aligned with the elongated opening.

In a socket assembly having a housing with a closed end and an open end and an axially slidable and rotatable bearing, a spring washer seated on the axially slidable and rotatable bearing with a protrusion or a recess on the external periphery for engagement with a cooperating recess or protrusion on an inner cavity of the housing to effectively stop movement of spring washer with the axially slidable and rotatable bearing during driving conditions.

A universal joint includes a first joining structure and a second joining structure movably coupled to each other. The first and the second joining structures are movable relative to each other to an aligned position and an inclined position. The first and the second joining structures include a resilient member disposed therebetween. The resilient member has a first end retained on the first joining structure and a second end retained on the second joining structure.

A surgical tool including a socket having a housing and an aperture within the housing, the socket configured to receive a ball and a pin at least partially in the aperture. The ball is positioned at least partially in the socket and configured to rotate within the socket, the ball comprising an elongated opening extending through the ball. The pin is coupled to the socket and disposed at least partially in the socket on opposite sides of the socket, the pin including a first longitudinal axis and extending through the elongated opening of the ball between opposite sides of the socket. The ball is configured to partially rotate about the first longitudinal axis of the pin, and partially rotate, about a second axis perpendicular to the first longitudinal axis of the pin, in a plane aligned with the elongated opening.

A device for avoiding the accidental separation of ball and socket in a ball joint assembly and preventing steering and mechanical loss of control on motor vehicles. The device includes a ball joint assembly having a screw-in type socket; provided with a first a second openings and a polymer bearing fitted inside the socket; a ball disposed in the socket such that the polymer bearing absorbs impact exerted on the ball, the ball having a first and second studs coupled thereto, the first stud protruding from the first opening, and the second stud protruding from the second opening the first and second studs includes a safety hole and cotter pin. The device further includes a bell-shaped retainer coupled to the second stud and having a wide portion larger than the second opening precluding thereby displacement of the ball out of the socket.

A socket assembly includes a housing having an inner bore extending along a central axis between a closed first end and an open second end. At least one bearing is disposed in the inner bore, wherein the at least one bearing has a bearing surface and a support surface opposite the bearing surface. The socket assembly also includes a ball stud having a shank portion extending outwardly from the housing through the open second end and a ball portion disposed in the inner bore. At least one preload washer biases the at least one bearing into engagement with the ball portion of the ball stud. The at least one preload washer has an outer coating of a low friction, heat insulating material.