Device for the tensile locking of pipe elements

Claim 1

A device for axially locking a joint between two pipe elements whose axes may have an angular deviation so as to preclude axial separation of the pipe elements, the device comprising an annular abutment projection integral with an outer surface of an end portion of a first of said pipe elements and spaced from one end thereof, a hollow member of revolution integral with an end portion of a second of said pipe elements and having an inwardly intending annular first shoulder, an inner annular recess and an annular second shoulder, which defines an axially outer end of the inner recess and also defines an entrance to said recess, a ring located axially between the second shoulder and the abutment projection and bearing axially against the abutment projection and defining an annular axial space with the second shoulder said ring having an outer diameter greater than the outer diameter of said abutment projection and the inner diameter of said second shoulder, said inner recess being in radially spaced relation to said outer surface and to the ring and said entrance having a diameter less than the outer diameter of said ring, said inner recess having an axial extent and an inside diameter which are such as to allow up to a given angular deviation between the axes of the two pipe elements without contact of said ring with said inner recess and second shoulder, said ring and said abutment projection being axially spaced from said first and second shoulders, said ring being of a resilient material and has a split which is parallel to the axis of the ring and extends throughout the axial length of the ring for receiving a tool for expanding the ring, the inside diameter of said recess being such as to allow sufficient expansion of the ring disposed inside said recess to permit the ring to pass over the abutment projection when inserting the first pipe elemeNt in the hollow member of revolution, and a hardened mass of initially moldable filler material disposed in the whole of said annular space and interposed between said inner recess and the ring and said outer surface, said inner recess, outer surface, first and second shoulders, abutment projection, and ring being in intimate contact with said filler material in the manner of a mold for said filler material, said material having such strength and such resistance to deformation as to be capable of withstanding force normally to be expected to be exerted on said material by said ring and second shoulder in pipe service.

Claim 2

A device for axially locking a joint between two pipe elements whose axes may have an angular deviation so as to preclude axial separation of the pipe elements, the device comprising an annular abutment projection integral with an outer surface of an end portion of a first of said pipe elements and spaced from one end thereof, a hollow member of revolution integral with an end portion of a second of said pipe elements and having an inwardly intending annular first shoulder, an inner annular recess and an annular second shoulder, which defines an axially outer end of the inner recess and also defines an entrance to said recess, a ring located axially between the second shoulder and the abutment projection and bearing axially against the abutment projection and defining an annular axial space with the second shoulder said ring having an outer diameter greater than the outer diameter of said abutment projection and the inner diameter of said second shoulder, said inner recess being in radially spaced relation to said outer surface and to the ring and said entrance having a diameter less than the outer diameter of said ring, said inner recess having an axial extent and an inside diameter which are such as to allow up to a given angular deviation between the axes of the two pipe elements without contact of said ring with said inner recess and second shoulder, said ring and said abutment projection being axially spaced from said first and second shoulders, said ring being of a resilient material and has a split which is parallel to the axis of the ring and extends throughout the axial length of the ring for receiving a tool for expanding the ring, the inside diameter of said recess being such as to allow sufficient expansion of the ring disposed inside said recess to permit the ring to pass over the abutment projection when inserting the first pipe elemeNt in the hollow member of revolution, and a hardened mass of initially moldable filler material disposed in the whole of said annular space and interposed between said inner recess and the ring and said outer surface, said inner recess, outer surface, first and second shoulders, abutment projection, and ring being in intimate contact with said filler material in the manner of a mold for said filler material, said material having such strength and such resistance to deformation as to be capable of withstanding force normally to be expected to be exerted on said material by said ring and second shoulder in pipe service.