초록 ▼

A pipe coupling for sealing a joint between pipes in a pipeline by compressing annular gasket members against the pipes around the joint, the pipe coupling comprising an annular coupling member having end members and spaced annular protrusions forming gasket channels between the annular protrusions

A pipe coupling for sealing a joint between pipes in a pipeline by compressing annular gasket members against the pipes around the joint, the pipe coupling comprising an annular coupling member having end members and spaced annular protrusions forming gasket channels between the annular protrusions and respective end members for receiving the annular gasket members and a central channel between the gasket channels for accommodating some offset, deflection, or out-of-roundness in the pipes. In one embodiment, the coupling further comprises an outer set of annular protrusions for forming expansion channels outside of the gasket channels. The expansion channels allow retaining rings fixed to the pipe ends to reciprocate within the expansion channels during expansion or contraction of the pipe ends. The protrusions also restrain the degree of expansion or contraction of the pipes and protect the gasket. In another embodiment, an interior pipe coupling with a spreader bolt assembly is provided.

대표청구항 ▼

[ I claim:] [1.] A pipe coupling for sealing a joint between pipes in a pipeline by compressing annular gasket members against the pipes around the joint, the pipes each having a retaining ring fixed to the pipe proximate the joint for retaining the coupling about the joint, the pipe coupling compri

[ I claim:] [1.] A pipe coupling for sealing a joint between pipes in a pipeline by compressing annular gasket members against the pipes around the joint, the pipes each having a retaining ring fixed to the pipe proximate the joint for retaining the coupling about the joint, the pipe coupling comprising:A. an annular coupling member having an axial split defined by first and second axial edges and comprising (1) an annular bridging member extending between the first and second axial edges, (2) opposing annular end members extending from annular edges of the bridging member to distal edges of the end members to form an annular coupling channel bounded by the bridging member and the end members, (3) a pair of inner annular protrusions spaced from one another and respective end members and extending from the bridging member into the annular coupling channel, and (4) a pair of outer annular protrusions, (a) one outer annular protrusion extending from one of the end members into the annular coupling channel and spaced from the distal edge of the one end member and the adjacent inner annular protrusion to form (i) a first expansion channel between the distal edge of the one end member and the one outer annular protrusion for receiving one of the retaining rings and (ii) a first gasket channel between the one outer annular protrusion and the adjacent inner annular protrusion for receiving one of the annular gasket members and (b) the other outer annular protrusion extending from another of the end members into the annular coupling channel and spaced from the distal edge of the other end member and the adjacent inner annular protrusion to form (i) a second expansion channel between the distal edge of the other end member and the other outer annular protrusion for receiving another of the retaining rings and (ii) a second gasket channel between the other outer annular protrusion and the adjacent inner annular protrusion for receiving another of the annular gasket members; andb. means for joining the first and second axial edges such that the coupling member compresses the annular gasket members against the pipes and the inner and outer annular protrusions prevent movement of the annular gasket members relative to the coupling member during expansion or contraction of the pipes, the first and second expansion channels allowing reciprocation of the respective retaining rings therein and the outer annular protrusions preventing the retaining rings from engaging the annular gasket members.