Abstract: A threaded joint for oil well pipes has excellent leak-tightness and a high disconnect torque and can withstand repeated make-ups. At the time of make-up, the load flanks (1) of the male and female threads contact each other, either the crest surfaces (3) or the root surfaces (4) are contacting and the other of the two pairs of surfaces has a gap, and a gap of at most 0.03 mm exists between the stab flanks (2) of the male and female threads.

Abstract: A profile gasket adapted for forming a seal in a joint between an annular band and annularly grooved ends of two pipes positioned end-to-end. The profile gasket comprises a sheet of elastomeric material having a bottom surface with at least two integrally molded and laterally spaced ridges running along its length.

Abstract: The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various other operations have a crosslinked thermoplastic resin layer and at least one joining portion which comprises a non-crosslinked thermoplastic resin layer that is formed a as an integral part of the crosslinked thermoplastic resin layer in the area where it contacts a tubular member to be joined, and a heating electric wire provided either within or on the outer or inner surface of the non-crosslinked thermoplastic resin layer. Such electrofusion joint and header are applicable to any part of a piping system for supplying hot water and they will withstand use for a prolonged period.

Abstract: Joint formers for coupling between duct components having different cross-sections include a core having holes for fixing members and an opening provided with a hollowed out recess. In the opening there is formed at least one series of stepped spot-faced edges forming a series of cavities, each cavity rotated with respect to the others.

Abstract: A pipe coupling having a pair of opposed, semi-circular collar halves to be attached via fasteners for clamping the halves together on abutting ends of collinear pipes. The pipe ends have circumferential grooves engaged by ridges on an inside of collar half. A pair of parallel reinforcing wings extend radially by a varying height on an outside of the collar halves, along the axial edges, providing rigidity and strength to the pipe coupling. The wings increase in radial height from the circumferential ends adjacent the tabs to a maximum at the center of the coupling. The wings thereby distribute unequal forces, which are concentrated at the center, to achieve equally distributed deformation with such forces, thereby reducing the possibility of the ridges disengaging the grooves due to concentration of deformation at a local area.

Abstract: An evaporator connection assembly in an automobile refrigerant system interconnects the inlet and outlet pipes or lines of an evaporator to supply and suction lines for connection to the condenser and compressor. The assembly utilizes a connection block comprising two halves, namely a plate and block. The block is fixedly connected to the evaporator pipes and the plate is connected to the supply and suction lines. The two halves are thereafter secured to one another. Planar seal surfaces are provided between the block and plate for receiving a sealing washer.

Abstract: Connectors with a lever in which a pair of male and female connectors are mated with and disconnected from each other by rotating the lever. The lever having cam grooves and a lock portion is rotatably attached to the female connector. Cam pins are attached to the male connector. When both connectors are initially mated with each other, the cam pins engage with the cam grooves, and when the lever is rotated in a direction in which both connectors are mated with each other, the male connector moves toward the female connector. An elastic locking member is interposed between the lever and the female connector. An operational portion, reverse spring portions for urging the lever toward a direction opposite to that in which both connectors are mated, and lock spring portions to be engaged with the lock portion of the lever so as to maintain the lever in a locked position, are all integrally formed in the elastic locking member.

Abstract: The present invention incorporates a nipple to be inserted inside a hose and a sleeve formed concentrically with the nipple. An annular groove is formed on the outer periphery of the nipple to receive the expanded portion of the rubber toward the tip end of the nipple when the sleeve is caulked and to prevent the rubber from bulging at the tip end of the nipple. The annular groove is configured so that it can receive a portion of the inner rubber wall of hose when the hose is inserted between the nipple and the sleeve when the latter is caulked. The annular groove may be located on the outer periphery of the nipple, such as at a position offset from being in-line with where the sleeve is caulked and nearer to the tip end of the nipple. The number of annular grooves is not limited to one, and may be plural. When plural grooves are formed, they may be arranged adjacent to each other or spaced at a given interval.

Abstract: A cup shaped collector mounted at one end of an elongate telescopically adjustable pole defines a water receiving chamber for receiving and containing at least a portion of an open sprinkler head and collecting water discharged from the open head. An elongate flexible hose connected to the collector communicates with the water receiving chamber and diverts water from the open head to a friendly location. Fluorescent markings on the collector aid in manually positioning the collector to receive the open head under conditions of darkness.

Abstract: A seal or connector and seal apparatus which includes a generally annular member having an outer surface and an inner surface and a plurality of tabs extending generally radially from at least one of the surfaces. The tabs are disposed to engage axially spaced teeth of an associated helically shaped threaded surface.

Abstract: A high pressure quick connector having a tube which includes an upset adjacent one end. A male locking assembly is positioned about the tube and includes a cavity enclosing the upset and a contoured outer surface defining first and second grooves spaced axially along the male locking assembly. A female member having an internal bore is adapted to receive the male locking member. The female member has an internal bore that includes a locking groove. An expandable annular locking ring is mounted about the contoured outer surface and the locking ring is initially mounted in the first groove and is slidable from the first groove to the second groove upon axial movement of the male locking assembly into the female member.

Abstract: A nut retention system for nut connected couplings including an end fitting having an outer end wherein interfering abutments are defined upon the end fitting and nut to limit retraction of the nut on the end fitting when the coupling is disconnected whereby the outer end of the nut will always axially extend beyond the outer end of the end fitting to protect the end fitting outer end and seal located thereon.

Abstract: A pipe-to-concrete transition apparatus is disclosed which, in on aspect, includes a flanged end of an HDPE pipe held in sealing contact with a flanged end of an FRP connection by a steel joining assembly, all encased in concrete of a concrete sump, the FRP connection having an outlet in fluid communication with the sump's internal bore. In one aspect an FRP layer covers the FRP-connection-to-sump interface and the steel connection assembly anchors the pipe in the concrete.

Abstract: A tubular coupling for metal pipes has a flange, a tubular element inserted in the flange and having one end connectable to a pipeline and another end and a ring-shaped insulating element arranged at the other end of the tubular element between the tubular element and the flange.

Abstract: The invention is a device for providing a clamping force about a connection end of elastomeric hose and tubing. The device includes a heat shrinkable polymer, having a diameter reducing release temperature, formed into a band. The band has a first nominal inside diameter defined as the diameter the band assumes upon being shrunk in free space and being smaller than the outside diameter of the connection end of the elastomeric hose and tubing. The band has a second nominal inside diameter defined as the diameter the band assumes upon being shrunk about the connection end of the elastomeric hose and tubing. The band also has a third nominal inside diameter defined as the diameter of the band after polymer orientation and before shrinkage, the third diameter being greater than the outside diameter of the connection end of the elastomeric hose and tubing. The first inside diameter is no greater than about 80 percent of the third inside diameter.

Abstract: The present invention discloses a diameter-reducing member joint device, where connecting a first member to be connected as the boss of a flange joint or composed of relatively large-diameter pipes to a second member to be connected and having an outer diameter smaller than that of the first member, characterized by interposing a diameter-reducing pipe joint, which has at one end a large-diameter connection portion connected to the first member and also at the other end a small-diameter connection portion connected to the second member, between the first and second members to be connected, and by using a ring-like or cylindrical heat-shrinkable member made of a heat-shrinkable type of shape memory alloy.

Abstract: One end portion of a pipe, which has a circumferentially extending external bead at the one end portion, is insertable into the internal sockets of an array of arms which are axially movably received in one end portion of a sleeve. The arms have external surfaces which cooperate with an internal surface of the sleeve to permit limited axial movements of the arms between first and second positions. When in the first positions, the arms can be flexed radially outwardly to thus permit insertion of the bead into or its extraction from the sockets. The internal surface of the sleeve and/or the external surfaces of the arms can but need not be conical, either entirely or in part. The sleeve can be inserted into a bore or hole of a nipple on a radiator or carburetor in a motor vehicle. One or more O-rings or other suitable sealing elements are installed between the sleeve and the external surface of the one end portion of the properly installed pipe.

Abstract: A cooperating combination of a metallic gland and a metallic grip ring is for both plastic pipe and metallic pipe used in fluid piping systems, where these pipes are part of assembled restrained sealed bolted joints. The grip ring, in addition to two well spaced major sized teeth, has several spaced minor sized pipe gripping circumferential teeth located between and beyond the major sized teeth. The major sized teeth extend radially inwardly farther than the minor sized teeth within the grip ring. When the installed grip ring is restraining a metallic pipe, only the major size teeth are, in part, penetrating the metallic pipe. When this installed grip ring is restraining a plastic pipe both the major size teeth and the minor size teeth are penetrating the plastic pipe. The major size teeth take a lot of concentrated force, which is created when the fasteners of the bolted joint are tightened.

Abstract: Galvanic isolation between two fluid-conducting members made of dissimilar materials is provided by a coupling pipe that separates the two members (e.g. a pipe and a valve). The coupling pipe includes a tubular section and two flange sections, which mate with the two fluid-conducting members. An insulating liner on the inside diameter of the tubular and flange sections of the coupling device extends the entire length of coupling pipe and is coextensive with flange insulators that separate the coupling pipe from the two fluid-conducting members. The substantial separation distance provided by the coupling pipe with continuous insulation prevents or significantly reduces electrochemical corrosion.

Abstract: The present invention is directed toward a quick release cam locking joint for connecting adjacent ducts for a track switch snow melter. The invention also includes a track duct support bracket for holding track switch snow melter track ducts.