Abstract: An apparatus and method for forming a fusion welded butt joint between thermoplastic pipe sections. Thermoplastic tubular insert sleeves having end flanges are inserted into the ends of the pipe sections with the flanges located in abutting relation. A coupling collar mounting a heating device is slid along one of the pipe sections into overlying relation with the butt joint formed by the engaged flanges. The heating device is energized to fusion weld the coupling sleeve to the pipe sections and to the flanges. The insert sleeves internally support the butt joint area of the pipe sections against thermal sagging during the fusion welding, and the flanges in their molten state tend to flow and compensate for dimensional discrepancies in the pipe sections.

Abstract: An elastic connection which functions as a compensator between two pipe ends or the like arranged at a distance from one another, consisting of a bellows body which is arranged between two counter-flanges which, on their respective end face facing the pipe end, are gripped from behind by in each case a rubber-elastic torus of the bellows body, each torus being received in an annular groove. Each counter-flange is connected to a respective flange on each pipe end. In order to make the compensator less expensive and simpler to assemble, the annular groove is formed as an annular sealing chamber which opens conically in the direction of the respective counter-flange.

Abstract: A section of metal pipe has one end connected to a main line pipe. A hollow cylindrical plastic piston having a plurality of O-rings thereabout is slidingly and sealingly received within the open end of the metal section. A plastic carrier pipe is fixedly received within the outwardly facing end of the piston for suitable interconnection to other equipment. First and second limits are spaced along the pipe section to locate the piston within the pipe section. These limits may be flanges machined into the pipe section, or the pipe section may be rolled so as to include an inwardly directed, circumferentially extending ridge. In a further version, the transition joint is incorporated into a riser arrangement in which the plastic carrier is located within an outer tubing or pipe and held spaced from the tubing walls throughout the entire length of the tubing. Also, replacement of a service line is accomplished by threading plastic pipe through original line and terminating via transition joints at each end.

Abstract: The end region of the fibre reinforced plastics hollow shaft (1) is clamped between an outer ring (3) and an inner ring (21) provided on the metal part (2) which is to be connected to the shaft. The two rings are clamped to the shaft wall and to one another so that there is a frictional connection between the shaft (1) and the metal part (2). The rings are clamped thermally by shrinking the rings on and into the shaft. This type of connection between a plastics shaft and a metal part is very simple and effective. (FIG. 1).

Abstract: A longitudinally divided sleeve of shrinkable material has a lock closure along longitudinal edges. One of the longitudinal edges includes a closure element having a locking groove formed by two longitudinally extending leg portions, a second longitudinal edge being provided with a locking element having a longitudinally extending hook part having a resilient projection which is received in the locking groove to form the lock closure. The resilient projection prevents the accidental removal of the hook part from the locking groove and preferably the material forming the two elements has a higher cross-linking than the remaining portions of the heat-shrinkable sleeve.

Abstract: A system for covering and supporting a conveyor belt system. The conveyor belt system is supported in large measure by a structural support tube. The structural support tube is simply a tube or pipe of the conventional type. Disposed through the center of the tube are a plurality of internal support pipes. In turn, auxiliary support pipes, smaller in diameter than the internal support pipes, may traverse the interior of the internal support pipe and extend out either end. Attached to the auxiliary support pipes is a conventional belt conveyor system. The belt conveyor system is, in turn, enclosed by a top cover and a lower enclosure. All of the parts are held securely together using readily available materials such as angle iron. The present invention is extremely flexible providing the capability of easily constructing 40, 60, 80 and 120 foot spans of conveyor system. In addition, it is possible to provide an open conveyor, a partially enclosed conveyor, or a totally enclosed conveyor.

Abstract: The invention involves a heat-shrinkable connection comprising a longitudinal channel and a cooperating element thickened at its end. The channel is composed of lateral leg parts which are dimensionally stable under the application of heat, and of at least one shrink region adaptable to the cooperating element in positively locking fashion under the application of heat. The shrink region in the connecting region thereby facilitates the joining of the connecting elements along the formed parts to be connected or along the longitudinal edges of an envelope.

Abstract: A plastic housing cover for a valve having an integral connector nozzle part provided with a metal threaded nipple element is proposed, in which it is assured that the threaded element, inserted in a sealing manner into the plastic, cannot destroy the tight connection with the plastic part during the twisting of insertion and possible twisting on the part of the threaded element itself. The threaded element is accordingly given an opportunity at the outset to rotate, while maintaining the tightness of the seal. The threaded nipple element is preferably a hollow threaded connector and the plastic part comprises a cover of a compressed air valve, especially a brake valve.

Abstract: An improved seal ring comprising a polymeric material ring in combination with a softer polymeric material ring. The seal ring can be used in either male or female fittings and is adapted to seal by mating engagement of the polymeric material with one set of threads and a recess in the other set of threads.

Abstract: A coupling including a first sleeve having an exterior surface provided with an annular, frusto-conical surface and a second sleeve of larger diameter than the first sleeve and having an annular, interior frusto-conical surface, the second sleeve being disposed about the first sleeve. Interengaging elements align the frusto-conical surfaces to define a generally V-shaped annular, axially opening groove between the sleeves and an O-ring seal is disposed in such groove and abuts both the frusto-conical surfaces. A compressing ring engages the O-ring seal oppositely of the frusto-conical surfaces to drive the O-ring into sealing engagement therewith.

Abstract: It is a question of a valve subplate on which valves or other components may be mounted. The subplate has a prismatic, i.e. plate- or block-like form, and serves for the supply of the valves or similar components through at least one internal duct, when opens at one end at a mounting surface adapted for the attachment of the valves, and at the other end at a connection side of the connection member for joining with a pressure fluid line or the like. At its end arranged on the connection side the duct is connected with a duct section having a threaded socket extending thereinto and also with an outwardly projecting male nipple extending from the connection side and formed integrally therewith and adjoining for example a further duct section coaxially or parallel to the axis thereof so that the nipple is connected with the said duct, and a pressure lead or the like may selectively connected with the threaded socket by virtue of the screw threads thereon or slipped onto the male nipple.

Abstract: A plastic Tee fitting formed by a main conduit body and an internally threaded adapter connected to the body at a right angle. The adapter is arranged end to end with a hollow neck which projects from the wall of the main body around a circular opening in the wall. The joint between the neck and adapter is strenghtened by an insert which is fitted in and glued to the neck and adapter on the inside and by a spout which is sleeved around and glued to the neck and adapter on the outside.

Abstract: A hose construction, a coupling arrangement therefor and method of making the same are provided, the coupling arrangement being utilized for conveying fluid therethrough and having a filter unit disposed therein to filter the fluid flow through the coupling arrangement, the coupling arrangement being a quick connect-disconnect coupling arrangement that comprises a first tubular coupling member having opposed open ends, a second tubular coupling member having opposed ends one of which is telecopically disposed in one of the ends of the first coupling member, and a staple-like fastening member securing the one ends of the coupling members together in the telescoping relation thereof.

Abstract: Precision makeup at high speed of the most used forms of pipe and casing for production wells is assured by a novel coupling system. A pipe collar is provided with an internal precision makeup ring whose length along the pipe axis assures precise positioning and engagement. When the nose of the pipe is engaged with metal-to-metal contact against a reference shoulder on the precision ring a side surface on the nose end of the pipe engages a center seal ring disposed in the side wall of the collar between the reference shoulder and the threaded portion. This seal constitutes an effective barrier against the leakage of high internal pressures into the thread engagement region. End seals are mounted in grooves in the end recess portions of the collar, outside the threaded engagement region, to provide seals against external pressure, which can also vent internal pressures that are in excess of a predetermined threshold.

Abstract: A connection for plain end well liner pipe and the like uses a threaded pin and box having a locking reverse angle thread profile to prevent radial separation of the pin and box due to deep well pressure and make-up pressures. The connection includes a primary internal seal structure wherein a metal-to-metal interference seal is located adjacent a thermoplastic ring seal. Separation of the interference seal due to the proximity of the thermoplastic seal is prevented by the locking thread profile. An external seal uses a metal-to-metal interference seal enhanced by a locking torque shoulder seal which acts with the thread profile to prevent radial separation of the interference seal.

Abstract: An improvement to the sealing ring of U.S. Pat. No. 4,085,951 is disclosed, wherein the sealing ring is of a special design including an in situ sealing flange generating corner, and the stepped thread pin and box members have been modified in the shoulder areas between the thread sections thereof to provide a pressure transmitting area for transmitting torque to the ring, and to provide room for the in situ sealing flange to form and extend beyond the faces of the improved ring.With the improved design, the sealing ring is capable of retaining hot gases or liquids with a pressure differential in at least a given direction across the sealed joint exceeding the yield pressure of the rubber or plastic of which the ring is made.

Abstract: A T-fitting for use with pipes of different diameter sizes includes a generally T-shaped hollow body defining a central flow transition passageway, and three spaced-apart pipe-connecting hollow ends formed on the body in flow communication with its central flow transition passageway. A pair of the pipe-connecting ends share a common axis and are disposed in opposing relation on the body. Each of the pair of pipe-connecting ends has a pair of tandemly-arranged outer and inner pipe-receiving sections defining respective outer and inner passageways in flow communication with the central passageway. The outer passageway is larger in diameter than the inner passageway, and the respective outer and inner sections have outer and inner shoulders with respective outwardly-facing internal surfaces adapted to abut with ends of pipes of different size diameters when received in the respective passageways.

Abstract: A threaded pipe connection is disclosed of the wedge-shaped thread type that avoids high stress concentrations in the box between the first thread and the end of the box by making the length of the box between the first thread and the end of the box equal to or greater than 5% of the pipe diameter and by providing clearance between the crest of the first full thread on the box and the root of the last thread on the pin and between the crest of the last full thread on the pin and the root of the first full thread on the box.

Abstract: A telescopic joint in low pressure corrugated plastic pipe. The joint includes a one-piece elastomeric gasket which functions as a seal between the telescoped pipes. The gasket has a sealing portion adapted to be disposed in a groove in one of the pipes and an anchoring portion adapted to be disposed in an adjacent groove. As the pipes are telescoped together the anchoring portion is trapped in the groove and anchors the sealing portion in place as it is compressed due to an interference fit with the pipes as the joint is made.

Abstract: A coupling is provided wherein each of two members to be coupled are provided with a series of centering elements for preventing decentering of the two members during periods of thermal change. Inner and outer centering elements are provided on each member, each element having centering surfaces extending radially and transversely relative to contact surfaces of the members to be coupled. The centering elements of one member contact the centering elements of the other member only at their centering surfaces, thereby allowing for thermal expansion toward other surfaces of the elements without deformation of adjacent elements. Additional decentering arrangements are disclosed for coupling flat members. The couplings disclosed are particularly advantageous for coupling metal to ceramic.