Thrust safety in socket connections of pipes

Claim 1

A pipe sleeve joint between two pipes one of which has at least one smooth end and the other of which has at least one sleeved end, said sleeved end having a conical radially inner surface adjacent the free end thereof with the smaller diameter of the cone being at the free end of the sleeve, the radially outer surface of the smooth end of the one pipe and the radially inner surface of the sleeved end of the other pipe defining an annular space, comprising a sealing ring located in said space and surrounding the smooth end of the one pipe and in sealing engagement with the radially outer surface of the smooth end of the one pipe and the radially inner surface of the sleeved end of the other pipe, and a clamping ring located in said space and surrounding the smooth end of the one pipe and axially supporting said sealing ring in said space, said clamping ring comprising a continuous elastically deformable ring comprised of a plurality of circumferentially spaced apart clamping pieces having crowned radially outer peripheral surfaces and having gripping means on the radially inner surfaces thereof to radially grip the radially outer surface of the smooth end of the one pipe, said clamping pieces being circumferentially spaced apart by means of intermediary pieces of elastic material, said clamping pieces have circumferentially disposed side faces and the intermediary pieces are primarily disposed in the area of said side faces and are secured to said clamping pieces, at least some of the clamping pieces and the intermediary pieces have substantially flat radially extending axial faces in direct contact with said sealing ring, said clamping ring being held in said space and forced radially inwardly by means of the conical inner surface of said sleeved end engaging the crowned radially outer surface of said clamping pices when axial thrust arises between said smooth end and said sleeved end.