Socket connection of tubes or tubular elements, in particular of metal
Water closet protector stabilizer
Rapid coupling for plastic pipes
Coupling Patent #: 4623170
ApplicationNo. 07/021881 filed on 03/04/1987
US Classes:285/4, Score line or groove285/104, With separate, encased pipe-gripping means285/232, With conduit gripping means (e.g., wedge ring)285/322, MOVABLE JAW (E.G., CONTRACTIBLE SOCKET)285/339Wedge
ExaminersPrimary: Reese, Randolph A.
Assistant: Knight, Anthony
Attorney, Agent or Firm
International ClassesF16L 25/02 (20060101)
F16L 37/092 (20060101)
F16L 25/00 (20060101)
F16L 37/00 (20060101)
Foreign Application Priority Data1986-03-05 DE
AbstractA spigot-and-socket joint which is secured against pulling apart, particularly for socket pipes manufactured by centrifugal casting or molding, wherein the spigot end of one pipe is pushed into the socket end of another pipe, with radial play, comprises a sealing ring and a gripping ring in the socket pipe, the gripping ring comprising a plurality of gripping segments mutually spaced circumferentially and each having a spherically convex radially outer surface and being interconnected in the circumferential direction by a vulcanized intermediate piece of rubber or the like, and a toothed configuration on the radially inner surface, so that when axial tensile forces arise at the joint, the toothed configurations are pressed radially inwardly against the spigot end by interaction of the spherically convex surfaces with an interior conical surface of the pipe socket which interior surface narrows in the direction of the distal end of the socket. In order to effectively eliminate relative radial movements of the gripping ring when the joined pipes are first subject to interior fluid pressure, an elastomeric holding piece is formed on the gripping ring, which gripping ring is separate from the sealing ring, the holding piece being attached to the distal end face of the socket and supporting the gripping ring.