In an implementation, a hydraulic assembly comprising an end section of a hydraulic hose formed from a volume of material, the end section having a first outer diameter and an open end, is formed by molding a flange in the end section of the hydraulic hose, and threading an annular gasket onto the end section of the hydraulic hose between the flange and the open end of the hydraulic hose, and adjacent to the flange. The flange is formed in the volume of material, and has a second outer diameter greater than the first outer diameter. The molding of the flange may include applying heat to a mold, inserting the open end of the end section of the hydraulic hose into the mold, and thermally deforming a portion of the end section of the hydraulic hose to form the flange.

In an implementation, a hydraulic assembly comprising an end section of a hydraulic hose formed from a volume of material, the end section having a first outer diameter and an open end, is formed by molding a flange in the end section of the hydraulic hose, and threading an annular gasket onto the end section of the hydraulic hose between the flange and the open end of the hydraulic hose, and adjacent to the flange. The flange is formed in the volume of material, and has a second outer diameter greater than the first outer diameter. The molding of the flange may include applying heat to a mold, inserting the open end of the end section of the hydraulic hose into the mold, and thermally deforming a portion of the end section of the hydraulic hose to form the flange.

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 within the second end and has an annular body and a spline groove formed in the annular body and facing radially inward. The insert device is pre-installed in the belled end during the belling process.

A pipe belling process where a heated thermoplastic pipe end is forced over a sealing gasket on a forming mandrel, with the pipe being subsequently cooled to retain the gasket in an internal groove simultaneously formed in the pipe end. The sealing gasket is a two-component gasket with an elastic component and a plastic component. The elastic component is stretched over a portion of the plastic component during assembly with the plastic component acting as a belling ramp for the gasket during the subsequent pipe belling operation.

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.

The present disclosure generally pertains to methods for manufacturing an improved plastic pipe. One method includes the steps of: providing a plastic pipe; heating a plastic pipe; inserting a mandrel into the heated plastic pipe to form a bell socket end, wherein the mandrel includes a Rieber gasket and a dummy gasket spanning the outer surface of the mandrel; cooling the plastic pipe; and removing the mandrel from the plastic pipe, wherein the Rieber gasket and dummy gasket remain within a gasket cavity formed in the newly-formed bell socket end of the plastic pipe. The method results in the bell socket end of the pipe having an interior diameter greater than the exterior diameter of the opposing, spigot end of the pipe, wherein the bell socket end further includes a gasket cavity with a greater diameter than the remainder of the bell socket end.

A method for manufacturing a plastic pipe including covering the teeth of a plurality of restraining segments circumferentially arranged and embedded within an annular gasket with a covering and placing the annular gasket on a mandrel with the covering arranged between the restraining segments and mandrel. The annular gasket and mandrel and are inserted into an end of a heated plastic pipe for forming a socket in the end of the plastic pipe, the socket including an annular cavity formed by the annular gasket. Upon removal of the mandrel from the socket, the covering functions to prevent acutely pointed teeth of the restraining segments from impinging upon the mandrel thereby allowing removal of the mandrel from the socket without removal of the annular gasket from the annular cavity.

A PVC-O pipe has an axis of symmetry, a main longitudinal extension in a direction parallel to the axis from first to second ends, an inner chamber passing from the first to second end and a seal, positioned in a respective housing seat, with circumferential extension relative to the axis. The seal has an inner surface, facing the inner chamber, and an outer surface, facing the housing seat. The outer surface has first and second contiguous portions defining a cusp. The first and second portions are inclined relative to a parallel direction by respective acute angles. The inner chamber has a taper leading externally at the first end, having a divergent shape. The taper has an inclination relative to the parallel direction equal to an acute angle whose value relates to the value of the acute angle of the first portion, relative to the parallel direction.

In an implementation, a hydraulic assembly comprising an end section of a hydraulic hose formed from a volume of material, the end section having a first outer diameter and an open end, is formed by molding a flange in the end section of the hydraulic hose, and threading an annular gasket onto the end section of the hydraulic hose between the flange and the open end of the hydraulic hose, and adjacent to the flange. The flange is formed in the volume of material, and has a second outer diameter greater than the first outer diameter. The molding of the flange may include applying heat to a mold, inserting the open end of the end section of the hydraulic hose into the mold, and thermally deforming a portion of the end section of the hydraulic hose to form the flange.

A unit for belling PVC-O thermoplastic pipe includes: a forming pad for deforming into bell shape an end of the pipe, the pad having a longitudinal central axis of symmetry and a region for housing an annular gasket to be coupled, internally, to the pipe; an annular contact element fitted slidably on said pad to move along the direction of the axis, between an advanced position contacting the gasket, and a withdrawn position. A first heating device heats the contact element to a predetermined temperature by contacting an inner surface of the end portion of the pipe fitted on the annular contact element. A second heating device externally heats the pipe fitted on the pad, in a predetermined zone of the pad at the end of the pipe.