Abstract: A restraining element for preventing separation of telescoped pipes comprising a compressible body of elastomeric material, the compressible body having metal segments spaced equidistantly around an exposed face of the body, each of the metal segments having a first exposed face with a row of teeth, at least four teeth of the row of teeth lying in an arc, and at least some of the metal segments having a single tooth extending radially outwardly beyond the face of the metal segment opposite the first exposed face.

Abstract: A restraining element for preventing separation of telescoped pipes comprising a compressible body of elastomeric material, the compressible body having metal segments spaced equidistantly around an exposed face of the body, each of the metal segments having a first exposed face with a row of teeth extending radially inwardly and a single acutely pointed tooth extending radially outwardly beyond the face of metal segment opposite said first exposed face.

Abstract: A wall at one end of a chamber in the bell end of an enclosing pipe is adapted to receive the nose end of toothed metal segments to prevent disengagement of pipes and to transfer radial forces into axial forces.

Abstract: This invention pertains to bolted mechanical pipe joints using toothed gripper rings to prevent separation of the pipe.

Abstract: This invention pertains to a method of making a pipe gasket having an asymmetric profile which is made by connecting two ends of an extruded elastomeric material, and the gasket made thereby.

Abstract: This invention pertains to a pipe joint which allows greater joint deflection by the use of a bell stub between a pair of coupled pipes. The bell stub has a bell contour inside and a plain end contour outside.

Abstract: The invention concerns pipe joints in which an improved locking segment has an outwardly extending protrusion which is adapted to abut a circumferential wall in the bell end of a pipe which telescopically receives a second pipe.

Abstract: A bell and plain end pipe joint are provided wherein the plain end has a raised portion on its outside diameter. A series of locking segments fit into a circumferential groove in the bell of one pipe and engage both the raised portion on the plain pipe and a portion of the bell. Upon an increase in fluid pressure in the pipes, the pipes tend to separate axially and the locking segments also contact and bear against a different portion of the bell. The joint provides a novel means of distributing the axial thrust tending to separate the pipe being joined.

Abstract: A friction reducing guide is provided as an insert in the metal gate of a resilient seated gate valve. The gate is encapsulated almost entirely with rubber except for the guide area. Friction is reduced and any corrosion resistant coating inside the valve body is protected, in the guide area, from excessive abrasion.