Joint secured against sliding

Details Joint secured against sliding Joint secured against sliding

1987-03-04

1989-02-21

Reese, Randolph A.

Pipe joints or couplings

Frangible element

Score line or groove

285104, 285232, 285322, 285339, F16L 2104

Patent

active

048059323

ABSTRACT:
A 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.

REFERENCES:
patent: 2116705 (1938-05-01), Marx et al.
patent: 2596182 (1952-05-01), Sosaya
patent: 3384392 (1968-05-01), Gilchrist
patent: 3899183 (1975-08-01), Wild et al.
patent: 3963298 (1976-06-01), Seiler
patent: 4212486 (1980-07-01), Logsdon
patent: 4293149 (1981-10-01), Bonel
patent: 4623170 (1986-11-01), Cornwall

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