Abstract: A stud end link comprises a main body having first and second openings and a swivel ball bushing. The first opening and swivel ball each have truncated spherical surfaces to allow the swivel ball to be seated within the first opening, while permitting the swivel ball to pivot a limited amount about a lateral axis within the first opening. The first opening includes a slot to facilitate installation and removal of the swivel ball. In some implementations, the swivel ball includes a tab which matingly fits within the slot to prevent rotation of the swivel ball about an axis perpendicular to the main body.

Abstract: Embodiments of a dragline rigging can reduce the number of different parts required by including an interchangeable dragline rigging link that can be used, in different orientations, as either a hoist link or a drag link. An interchangeable dragline rigging link can include a socket connector, a dump connector, and chain connectors on either side of the link. The socket connector and dump connector can include parallel pin receiving holes, while the chain connectors can accommodate pins in a direction perpendicular to the pin receiving holes of the socket connector and dump connector. Further, the hoist assembly and drag assembly of the dragline rigging can be designed to accommodate the same size pin at a plurality of locations, in order to further increase the interchangeability of parts of the dragline rigging.

Abstract: A coupling link for connecting chain includes a generally C-shaped link member, a lock member, and a securing member. The C-shaped link member defines an interior opening and has first and second opposing ends that are spaced from each other by a gap. The lock member is shaped to couple the first and second ends together. The securing member is operable to secure the lock member to the link member and to urge the first and second ends of the link member closer together.

Abstract: A coupling link for connecting chain includes a generally C-shaped link member, a lock member, and a securing member. The C-shaped link member defines an interior opening and has first and second opposing ends that are spaced from each other by a gap. The lock member is shaped to couple the first and second ends together. The securing member is operable to secure the lock member to the link member and to urge the first and second ends of the link member closer together.