Abstract: A nut and ferrule assembly including a nut having an internal-threaded bore along a nut axis and a nut sealing surface, the threads of the internal-threaded bore having a nut thread pitch and a nut thread minor diameter, a ferrule having an annular body forming an axial bore and a ferrule sealing surface, the ferrule sealing surface corresponding to the nut sealing surface, the ferrule further having a protrusion extending outwardly from the body around at least a portion of the body, the outside diameter of the protrusion being greater than the nut thread minor diameter, and the ferrule positioned within the internal-threaded bore.

Abstract: A method for reshaping a tube end using a reshaping tool incorporating a tool head and clamp for reshaping the cross section of a tube constructed from one or more polymer materials. The clamp holds the tube in place while the head portion of the tool, which is moveable with respect to the clamp, engages the tube for reshaping its profile cross section. The tube may be crosslinked polyethylene tube.

Abstract: A reshaping tool incorporates a tool head and clamp for reshaping the cross section of a tube constructed from one or more polymer materials. The clamp holds the tube in place while the head portion of the tool, which is moveable with respect to the clamp, engages the tube for reshaping its profile cross section.

Abstract: The invention described herein pertain generally to a process by which an injection overmolded profile may be materially bonded to a previously crosslinked profile.

Abstract: The invention relates generally to push-to-connect fitting with greater cross-section dimensional control made by injection overmolding the male and female fittings onto a length of an extruded tube.

Abstract: A unitary molded crosslinked polyethylene tubular connector in a metallic sleeve and method for forming the connector with various end configurations (e.g., molded, belled) is described. The process combines the ease of thermoplastic processing combined with the desirable physical properties of a thermoset. The connector is suitable as a replacement for copper tubes with associated fittings as well as polybutylene tubing.

Abstract: A process for the fabrication of a thermoset water heater tube is described. By shifting to a thermoset rather than a thermoplastic, a much higher heat distortion temperature is achieved when compared to standard thermoplastic materials such as polypropylene, polyethylene, ABS or PVC. The stress crack resistance is also higher as is the dimensional stability. These desirable properties can be achieved by using a lower cost material, in contrast to a more expensive thermoplastic, and solves the problem of water heater tube failure when dry firing conditions are present. The invention utilizes thermoplastic processing conditions, with subsequent crosslinking to form a thermoset. This combines the best features of both types of materials: (1) the ease of thermoplastic processing; combined with (2) the desirable physical properties of a thermoset.

Abstract: A unitary molded crosslinked polyethylene tubular connector and method for forming the connector with various end configurations (e.g., molded, belled) is described). The process combines the ease of thermoplastic processing combined with the desirable physical properties of a thermoset. The connector is suitable as a replacement for copper tubes with associated fittings as well as polybutylene tubing.