Woco Franz-josef Wolf & Co. Gmbh

Hansjorg Lauer

Franz Josef Wolf

A coupling for connecting pipe ends includes a sleeve member having radial flanges at the longitudinal ends thereof, a plurality of spaced ribs, tightening straps disposed about the sleeve between the spaced ribs, and a resilient collar extending into the sleeve for receiving the pipe ends, the resilient collar also extending around the longitudinal ends of the sleeve member and around the radial flanges, the resilient collar further having a ring-like section extending on the longitudinally inner sides of the radial flanges such that the ring-like section grips onto the longitudinal inner sides of the radial flanges.

Coupling

A ring-packed pipe spigot-and-socket connection in which an elastic rubber packing ring having an essentially V-shaped cross section is disposed in an annular groove provided in the inside wall of a socket in such a way that prior to the insertion of the spigot end, one of the two legs of the V-shaped packing ring lies substantially axially aligned and turned toward the outlet of the socket, while the other leg extends substantially radially into the interior of the socket. After insertion of the spigot end, the two legs of the V-shaped packing ring provide a seal at the external wall of the spigot end. In the process, the segment of the packing ring facing the two sealing legs, i.e. the 'foot segment', seals against the bottom of the annular groove. The annular groove has the shape of a substantially shallow V-shaped chamber and is of such a width that it can accommodate the spread-out packing ring completely when the spigot end has been inserted in the socket. On its two axially opposite ends, the annular groove is bound by radially extending circular ring surfaces, whose radially innermost edge is defined by the intersection of the surface with the cylindrical inside wall of the socket. The foot segment of the packing ring is of toroidal design in the manner of the ball of a ball-and-socket joint and rounded off relatively flatly or shallowly. It lies in a recess whose profile is complementary to the profile of the foot segment and which has been provided axially approximately in the center of the circular groove having been designed in a shallow V-shape. This recess acts as an annular socket like that in a ball-and-socket joint for the foot segment of the packing ring. It accommodates and blocks the foot segment of the packing ring against axial displacement, but permits flexure of the ring in the recess of the groove. The recess is preferably slightly undercut in the direction toward the base of the socket.

Ring-packed pipe spigot-and-socket connection

A gasket for a socket-spigot connection between a socket end and a spigot end of two pipes to be connected is made of a material stable as to its shape and adapted to carry at its inner radial side at least one resilient sealing ring and at its outer radial side at least one other sealing ring. The gasket has an outer diameter equal to or slightly less than the inner diameter of the socket and an inner diameter equal to or greater than the outer diameter of the spigot. The gasket has a radial inner ring groove and a radial outer ring groove, the radial inner ring groove being constructed and arranged to receive one of the seal rings to provide a pressure seal engagement between the one seal ring and the outer surface of the spigot, the radial outer ring groove being constructed and arranged to receive another of the seal rings to provide a pressure seal engagement between the other seal ring and the inside surface of the socket.

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Bad Soden-Salmunster, Germany

Hansjorg Lauer