A joint structure for connecting lengths of pipe uses a plurality of teeth to engage the surface of at least one end of the adjacent lengths of pipe to connect the ends. A deformable member applies forces to the plurality of teeth to engage the surfaces. In an aspect, the plurality of teeth are releasable. In another aspect, the plurality of teeth are permanently engaged into the surfaces.

A pipe connection assembly having a fitting, an end section of the fitting for receiving a pipe end, a sealing ring, a separating ring, a cutting ring and a holding element, wherein the fitting has an inner section with an inner diameter adapted to the outer diameter of the pipe end to be received, wherein the end section has an inner contour tapered in sections starting from the distal end, wherein the sealing ring, the separating ring and the cutting ring are arranged such that they are axially movable inside the end section of the fitting, and wherein the holding element has an inner thread for screwing onto an outer thread formed on the fitting and a stop element protruding inwards for abutment against the arrangement of the sealing ring, the separating ring and the cutting ring.

A pipe connection assembly having a fitting, an end section of the fitting for receiving a pipe end, a sealing ring, a separating ring, a cutting ring and a holding element, wherein the fitting has an inner section with an inner diameter adapted to the outer diameter of the pipe end to be received, wherein the end section has an inner contour tapered in sections starting from the distal end, wherein the sealing ring, the separating ring and the cutting ring are arranged such that they are axially movable inside the end section of the fitting, and wherein the holding element has an inner thread for screwing onto an outer thread formed on the fitting and a stop element protruding inwards for abutment against the arrangement of the sealing ring, the separating ring and the cutting ring.

A pipe sealing gasket is shown which is designed to be received within a raceway provided within a socket end of a female bell plastic pipe end which is assembled with a mating male pipe end to form a plastic pipe joint. The raceway is preformed about the gasket during the pipe belling operation. The gasket has a rubber body portion which is reinforced by a hard plastic band formed as a series of integral, spaced wedges which are interconnected by a flexible ribbon. The hard plastic band acts to prevent extrusion of the gasket during a variety of pressure conditions as well as preventing displacement during field assembly.

A pipe sealing gasket is shown which is designed to be received within a raceway provided within a socket end of a female bell plastic pipe end which is assembled with a mating male pipe end to form a plastic pipe joint. The raceway is preformed about the gasket during the pipe belling operation. The gasket has a rubber body portion which is reinforced by a hard plastic band formed as a series of integral, spaced wedges which are interconnected by a flexible ribbon. The hard plastic band acts to prevent extrusion of the gasket during a variety of pressure conditions as well as preventing displacement during field assembly.

A restrained pipe joining system for plastic pipe is shown comprising male and female pipe ends, the male pipe end having an external circumferential groove and the female pipe end having an internal recess which contains a circumferential casing element, the casing element receives a non-circular click fit restraint ring which engages the external circumferential groove of the male pipe end during the make-up of the pipe ends to form a sealed and restrained pipe joint.

A restrained pipe joining system for plastic pipe is shown comprising male and female pipe ends, the male pipe end having an external circumferential groove and the female pipe end having an internal recess which contains a circumferential casing element, the casing element receives a non-circular click fit restraint ring which engages the external circumferential groove of the male pipe end during the make-up of the pipe ends to form a sealed and restrained pipe joint.

A restrained pipe joining system for plastic pipe is shown comprising male and female pipe ends, the male pipe end having an external circumferential groove and the female pipe end having an internal recess which contains a circumferential casing element, the casing element receives a non-circular click fit restraint ring which engages the external circumferential groove of the male pipe end during the make-up of the pipe ends to form a sealed and restrained pipe joint.

A restrained pipe joining system for plastic pipe is shown comprising male and female pipe ends, the male pipe end having an external circumferential groove and the female pipe end having an internal recess which contains a circumferential casing element, the casing element receives a non-circular click fit restraint ring which engages the external circumferential groove of the male pipe end during the make-up of the pipe ends to form a sealed and restrained pipe joint.

A polymer pipe has a length between a first end and a second end. The length and the first end have a first diameter and the second end is a belled end having a second diameter larger than the first diameter. An insert device is received or pre-installed within the second end and has an annular body with a seal part coupled to the annular body and a spline groove formed in the annular body and facing radially inward. Another polymer pipe is inserted in the belled end to form a pipe joint assembly and has a mating spline groove on the outer surface. The spline groove and mating spline groove axially align and receive a spline therein to axially interlock the two polymer pipes to form a pipe joint assembly.