A method of repairing a chain can include aligning a bore of an outer chain link with a bore of an inner chain link, inserting a pin through the aligned bores, the pin having a thread end opposite a head end, engaging a multi-jackbolt tensioner with the thread end of the pin, the multi-jackbolt tensioner having a plurality of fasteners, advancing each of the plurality of fasteners to press on the outer chain link, and forming an interference fit between the pin and the outer chain link at the bore of the outer chain link from the advancing of the fasteners.

A vertical or block chain connector for linking between two closed chain links includes a lower element and an upper element configured to engage with the lower element to form the chain connector in an assembled condition. In use the lower element is disposed vertically below the upper element in the assembled connector. The upper element is a sliding fit with the lower element and the direction of the sliding connection is in a straight line perpendicular to the longitudinal axis of the connector and in a plane which is parallel to the horizontal axis when the connector is vertically oriented in use.

A vertical or block chain connector for linking between two closed chain links includes a lower element and an upper element configured to engage with the lower element to form the chain connector in an assembled condition. In use the lower element is disposed vertically below the upper element in the assembled connector. The upper element is a sliding fit with the lower element and the direction of the sliding connection is in a straight line perpendicular to the longitudinal axis of the connector and in a plane which is parallel to the horizontal axis when the connector is vertically oriented in use.

The invention relates to a chain comprising a plurality of interconnected chain-links wherein at least one chain-link comprises a braided core comprising a first primary strand comprising polymeric elongated elements wherein the polymeric elongated element has a tenacity of at least 1.0 N/tex wherein the braided core is braided from at least 2 consecutive turns of the primary strand. The invention also relates to a braided endless shaped element suitable as chain-link for said chain. The invention further relates to a chain wherein the chain has a tenacity (Ten) in N/Tex and a combined titer of the 2 legs of the chain-link comprising polymeric elongated elements (T) in MTex, with Ten0.50*T.sup.0.05.

The invention relates to a chain comprising a plurality of interconnected chain-links wherein at least one chain-link comprises a braided core comprising a first primary strand comprising polymeric elongated elements wherein the polymeric elongated element has a tenacity of at least 1.0 N/tex wherein the braided core is braided from at least 2 consecutive turns of the primary strand. The invention also relates to a braided endless shaped element suitable as chain-link for said chain. The invention further relates to a chain wherein the chain has a tenacity (Ten) in N/Tex and a combined titer of the 2 legs of the chain-link comprising polymeric elongated elements (T) in MTex, with Ten0.50*T.sup.0.05.

A suspension ring for multistrand lifting tackle comprises two parallel rectilinear legs connected to one another at their ends by arcuate connecting legs. A lower connecting leg is along a longitudinal center line of the ring, extending as a circular segment in the central region of its extent and in the two regions in which it merges into each of the two legs. The radii of the rounded portions on the inside of the ring are less than half the internal width of the ring but greater than half the diameter of the legs, and the central region in the form of a circular segment is connected at its ends to the transitional region as a circular segment to the adjacent leg via a rectilinear intermediate segment of the connecting leg. An angle of the intermediate segment ranges from 50 to 75 to the longitudinal center line of the ring.

A suspension ring for multistrand lifting tackle comprises two parallel rectilinear legs connected to one another at their ends by arcuate connecting legs. A lower connecting leg is along a longitudinal center line of the ring, extending as a circular segment in the central region of its extent and in the two regions in which it merges into each of the two legs. The radii of the rounded portions on the inside of the ring are less than half the internal width of the ring but greater than half the diameter of the legs, and the central region in the form of a circular segment is connected at its ends to the transitional region as a circular segment to the adjacent leg via a rectilinear intermediate segment of the connecting leg. An angle of the intermediate segment ranges from 50 to 75 to the longitudinal center line of the ring.

A chain having a horizontal chain link and a vertical chain link linked in the horizontal chain link. The chain links each having two legs and two opposite bows connecting the legs to one another, such that the links each form self-contained courses. The horizontal link has a functional section on at least one bow designed, on the one hand, in a blocking plane such that the functional section cannot plunge through the vertical link arranged in a first orientation relative to the horizontal link, and, on the other hand, with a width that is narrower than the inner width of the vertical link such that that functional section can plunge through the vertical link arranged in a second orientation relative to the horizontal link. The horizontal link has an inner support section in the inward-facing apex bow region and, on the functional section, provides an outer support path leading around the course of the horizontal link for supporting the vertical link.

A chain having a horizontal chain link and a vertical chain link linked in the horizontal chain link. The chain links each having two legs and two opposite bows connecting the legs to one another, such that the links each form self-contained courses. The horizontal link has a functional section on at least one bow designed, on the one hand, in a blocking plane such that the functional section cannot plunge through the vertical link arranged in a first orientation relative to the horizontal link, and, on the other hand, with a width that is narrower than the inner width of the vertical link such that that functional section can plunge through the vertical link arranged in a second orientation relative to the horizontal link. The horizontal link has an inner support section in the inward-facing apex bow region and, on the functional section, provides an outer support path leading around the course of the horizontal link for supporting the vertical link.

A chain having a chain link with two legs and two bows connecting the legs together, the bows extending in the bow extension direction between the two legs, wherein an end face of at least one bow, which faces outwards in the pitch direction of the chain link, has two pressure portions spaced apart from one another in the bow extension direction and an intermediate portion connecting the pressure portions, wherein the pressure portions each provide a contact surface between the chain link and a corresponding chain pocket of a chain wheel for introducing a force into the chain, and wherein the end face of the bow is convexly curved in the bow extension direction in the pressure portions and the end face of the bow has, at least in portions in the intermediate portion, a smaller radius of curvature than in the pressure portions.