Abstract: An adaptor for use with dockside pumps to facilitate pump out of sewage holding tanks is constructed so that it readily accommodates both of the two most common fittings for dockside pumps, an elastomeric material right circular cone frustrum, and a cam actuated fitting having a number of curved locking surface locking cams. The adaptor is a tubular body of rigid material having first and second ends with a concentric bore. An interior surface of the first end defines a cone frustrum cooperable with the dockside pump cone frustrum fitting, and the exterior surface of the first end is a cylindrical surface with a semi-toroidal recess at a central axial portion, which recess cooperates with the curved surfaces of the locking cams. The second end of the adaptor has external threads that fit one of three common sizes of boat deck fitting internal threads (e.g.

Abstract: A pipe coupling arrangement for coupling an end of a pipe section includes a coupling body having its open end, into which the end of the pipe section is inserted. An outer ring and a radially compressed inner ring are disposed in the open end of the coupling body. Inclined peripheries are respectively defined in the inner periphery of the outer ring and the outer periphery of the inner ring. These inclined peripheries are inclined so as to become smaller in diameter as they advances towards the open end of the coupling body. The inclined periphery of the outer ring and that of the inner ring are engaged by each other. A pressing means for pressing an outer periphery of the outer ring is provided such that the inner ring is tightly pressed against an outer periphery of the pipe section via the outer ring. A space is defined by the inclined surface of the outer ring and the outer periphery of the pipe section, into which the inner ring is inserted.

Abstract: A method of joining conduits includes using a coupler, which includes a pliable tubing and a pair of end sleeves. The coupler is attached to the ends of a pair of conduits by flexing the tubing to cause the coupler to flex into proper alignment and connection with the conduits.

Abstract: A breather pipe mounted to a fuel tank is divided into an outer pipe and an inner pipe, a flange is integrally formed at an end part of the outer pipe on the tank side, then the flange is projection-welded to a wall part of the fuel tank, ensuring a sealability. An upper end of the inner pipe is inserted and held to a lower end of the outer pipe in the fuel tank, and the outer pipe and the inner pipe are sealed by a sealing member, tapering joint or caulking joint. Thus, the sealability at the joint part is ensured, while enhancing a joint strength without soldering which involves pollution.

Abstract: A female luer connector comprises a tube having an open, outer end in a luer-tapered bore communicating with the outer end. The tube carries a side arm that from a positioned spaced longitudinally from the open, outer end, with the side arm extending both radially outwardly from the tube and in generally longitudinal relationship with the axis of the bore toward the open, outer end, to define a space between the tube and the side arm for receiving an outer, threaded sleeve of a male luer lock connector. A cap is connected to the side arm through a plastic hinge in a position permitting the cap to pivot between a closed position in which the cap closes the open, outer end, and an open position in which the cap is spaced from the open, outer end. The side arm defines an effectively rigid, fixed configuration to position the hinge and cap to naturally and spontaneously permit pivoting to the closed position to the open position, typically upon pressing with a single finger.

Abstract: A coupling (10) for connecting hoses or other conduits carrying refrigerant material in an automobile air conditioning system has a male end (12) and a female end (14). The male end has an extending portion (26) which is accepted into an aperture (50) in the female end when the coupling ends are connected. A pair of o-ring seals (34), seal the ends in fluid tight engagement when they are connected. Finger portions (24) on legs (22) of a leaf spring (20) mounted on the male end, engage step areas (68) on the female end to hold the coupling ends together when engaged. The legs nest in slots (64) to prevent relative rotation of the coupling ends. Tapered portions (66) of the slots provide for ease of engagement of the coupling ends. The legs of the leaf spring are biased apart as the coupling ends are pushed together until the finger portions engage the step areas. Disengagement is achieved by spreading the legs of the leaf spring with a special tool (72) and separating the coupling ends.

Abstract: The invention relates to a gastight connection between tubes of small diameter of metals or metal alloys having different melting points, more particularly copper and aluminium, wherein the end zone of the first tube (1) is opened out and the second tube (2) of a lower-melting material is inserted and soldered into the opened-out portion (3), the internal generated surface of the opened-out portion (3) merging via an internal cone (4) and extension (38) into that zone of the first tube (1) which is not opened out, a sleeve (34) of special steel possibly being inserted in the end zone of the second tube (2).

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: An end closure fabrication for a generally cylindrical non-metallic pressure vessel having an opening at one end thereof which includes a collar which is adhesively bonded to sides of the vessel adjacent to the open end of the vessel. A circular end pressure plate equipped with an annular seal is inserted in the end of the vessel and an end cap to secure the pressure plate is attached over the collar.

Abstract: A shrouded tubing interface for quickly connecting, disconnecting and avoiding contamination of first and second fluid flow lines comprising male and female connectors, each of which are connected to a respective one of the fluid flow lines. The male connector includes a first tubular portion defining a distal tip and a tapered outer surface, while the female connector includes a second tubular portion having a distal tip and a tapered inner surface. The tapered surfaces of the first and second tubular portions are mutually tapered such that the first and second tubular portions are axially interfittable. The male and female connectors further include first and second tubular skirt portions, respectively, associated with and extending about the respective tubular portions which are adapted to prevent contact to respective ones of the distal ends, and are further positioned to radially and axially overlap when the tubular portions are brought into interfitting engagement at the tapering surfaces.

Abstract: A coupling for connecting a connecting pipe to a main pipe. The coupling comprises a coupling member and a nut screwed into the coupling member. A projection having an arc-shaped cross-section and extending in the circumferential direction of the outer wall of the main pipe is formed on the outer wall of the main pipe, and the coupling member is rotatably fitted onto the projection. A conical shape groove connected to the high pressure fluid passage in the main pipe is formed on the outer wall of the main pipe, and the tip portion of the connecting pipe is pressed against the conical shape groove by tightening down the nut.

Abstract: A disconnectable flow connector is formed of (a) a frusto-conical taper pin having a longitudinal bore through which the end portion of a flow tube of a mass flow sensor is inserted and secured and (b) a connector base containing a matched frusto-conical taper bore. The taper pin can be press-fit into the taper bore to form a fluid flow passage having a leakage level less than about 10.sup.-9 scc/sec helium.

Abstract: A disconnectable flow connector is formed of (a) a frusto-conical taper pin having a longitudinal bore through which the end portion of a flow tube of a mass flow sensor is inserted and secured and (b) a connector base containing a matched frusto-conical taper bore. The taper pin can be press-fit into the taper bore to form a fluid flow passage having a leakage level less than about 10.sup.-9 scc/sec helium. with a series of spaced apart, transverse grooves separated by lands in sealing engagement with the matched taper bore.

Abstract: This invention is concerned with an assembly device of a hose connection in which a tubular joint is connected to the hose connection and is capable of cooperating with an inlet and outlet nipple of the waterbox of the heat exchanger, the tightness being ensured by a seal of an elastomer material and the maintenance in the assembled condition of the joint and the nipple being ensured by a bracket (14 and 15), the component carrying the bracket being fitted with a ring (12) with a conical outer surface, axially mobile in the unassembled condition.

Abstract: A cuff type air seal for sealing the overlap of partly telescoped parts that has an annular body of rubber or elastomer material having annular internal air sealing beads thereon which are adapted to fit on outer peripheral surfaces of the parts adjacent their overlap. Both parts have fixed outer diameters but the outer part may be a blow molded annular component having an internal diameter which varies so usually there is clearance and a potential air leak path at the overlap. An adjustable clamp encompasses the air seal and provides a constricting force so that the air sealing beads seal on the outer surfaces of the parts even though the clearance remains. The cuff is formed with a pocket that receives and retains a headed portion of the blow molded part when telescoped over the facing headed portion of the first part, particularly when the clamp is constricted.

Abstract: Gasket apparatus and hermetically sealed joints employing the apparatus are provided wherein a tapered male member and a tapered female member are joined and a substantially hermetic seal is created around a predetermined circumferential zone between the male member and the female member by a gasket disposed to have a protrusion thereon at the predetermined zone to engage one of the male or female members to concentrate the sealing forces for making up the joint at that zone.

Abstract: Possible penetration into the pressure bearing surface of the pressure head portion of the branching connector when the pressure bearing surface is connected in abutting engagement to the pressure receiving bearing surface of the fuel rail is prevented by providing a relief portion at least on both sides

Abstract: A connector for medical devices includes a housing having an interlock member and two types of luer nuts. One type of luer nut has an interlock member complementary to the interlock member on the housing to prevent rotation of the luer nut about the housing, while another type of luer nut lacks a complementary interlock member, allowing free rotation of the luer nut relative to the housing.

Abstract: A interconnection system for coaxial fluid tubing includes zero-clearance connectors having a metallic innner gasket for sealing an inner passageway for a first fluid and having a elastomeric outer gasket for sealing an outer passageway for a second fluid. The elastomeric outer gasket forms a fluid-tight seal as the connectors are tightened. Further tightening of the connectors engages and seals the metallic inner gasket. Both straight tubing sections and elbows are constructed in a factory setting so that the completed sections can be assembled at a job site without cutting or welding.

Abstract: Coupling device and method for joining together tubular elements such as sections of aluminum tubing. The device comprises a coupling sleeve having conically tapered walls of diameters corresponding to the diameters of the tubular elements to be joined together. The tubular elements and the sleeve are pressed together to form a rigid structure in which the tubular elements are aligned axially of each other and the walls of the cooupling sleeve are in tight frictional engagement with the walls of the tubular elements.

Abstract: There is provided rotatable pressure tight pipe joints and non-rotatable pressure tight pipe joints. The rotatable pressure tight pipe joints preferably have mating spherical surfaces with a sealing ring overlapping the joint between two pipe ends and compression means resiliently holding the two body parts of the joint in contact. In the non-rotatable joints, the intersecting surfaces form a zigzag cross-section and are compressibly clamped together.

Abstract: A male luer lock fitting, having an elongated nozzle and an internally threaded locking ring mounted around the nozzle. The locking ring has complete freedom to rotate about the nozzle axis, and limited freedom to translate along the nozzle axis. The length of the nozzle which extends outward from locking ring is chosen so that the inventive device is capable of piercing commonly used medical fluid container ports. The nozzle and locking ring are designed to have relative dimensions which enable a user to disconnect the inventive device easily from a female luer lock. Preferably, the inventive device is dimensioned to meet the ANSI/HIMA MD70.1 and ISO standards.

Abstract: A one-piece hollow sleeve molded of an elastomeric vinyl has a cylindrical rear end portion for attachment to a flexible hose of central vacuum cleaning system and has a front end portion which is slidably frictionally engageable within the inlet opening of variety of inlet valves. The front end portion is formed with a series of specifically sized and located tapered zones of varying lengths and angles of taper which enable the sleeve to be used with a variety of inlet valves having various internal diameters and lengths. A metal band is seated in a recess formed in the front end portion between certain of the tapered zones and has a length and location enabling it to contact the various pairs of contact buttons of the various types and styles of inlet valves. This universal sleeve eliminates a different hose attachment sleeve being required for each of the most common inlet valves of the most popular central vacuum cleaning systems.

Abstract: An inlet water line connector for connecting an inlet water line to the end of a water faucet shank having external threads on the outer cylindrical surface thereof. The body has an opening therethrough into which first end and inlet water tube of a predetermined outer diameter may be inserted. The body has an outer tapered surface for fitting within and engaging a tapered internal inlet region of the faucet shank. The outer tapered surface of the body has a forced fit with the tapered internal inlet region of the faucet shank. A retention member is disposed within the body and has a relaxed state and a holding state. The retention element remains in its relaxed state as the water line is inserted through the body whereby it is in spaced relation to the water line. The retention element is moved into its holding state after the water line has been inserted through the body to place the retention element into intimate contact with the water line.

Abstract: A sealing joint for use in a conduit system where an elevated pressure may exist at one side of the system comprises a pair of co-axial tubular metal sections with intermesting tapered edges which are clamped against each other by fastening means, such as a swivel nut, so as to establish a fluid tight seal formed by the conical contact area between the tapered surfaces of said edges.One of the tubular sections has a tapered edge which is at one side thereof exposed to the elevated pressure. This section has a smaller wall thickness than the tapered edge of the other tubular section so as to allow the elevated pressure to press said tapered edges onto each other.

Abstract: There is provided solar heat collecting apparatus which comprises a solar collector panel rotatably supported about a horizontal and a vertical axis and drive means for rotating the panel simultaneously about the two axes. The collector panel comprises a fluid carrying collector pipe extending longitudinally within the trough member. The collector pipe is maintained in fluid flow connection with an inlet pipe and an outlet pipe, through a series of fluid-tight swivel joints which permit the free biaxial rotational movement of the collector pipe with the collector panel.

Abstract: The invention refers to a structural part comprising a flange (6) and at least one exhaust gas tube (1) being inserted into a perforation (5) of the flange (6) and being connected therewith by a welding seam (11) arranged on the free end (2) of the exhaust gas tube (1), in particular to an exhaust gas bend for internal combustion engines. The end (4) of the exhaust gas tube (1) is reduced in diameter and tapers in opposite direction to the flow direction (8) of the exhaust gases. The wall (7) of the perforation (5) tapers with the same tapering angle (.alpha.) as does the end (4) of the exhaust gas tube (1). The tapering end (4) of the exhaust gas tube (1) snugly engages the wall (9) of the perforation (5) over at least part of the thickness (13) of the flange (6). The tapering end (4) of the exhaust gas tube (1) is seated within the tapering area (9) of the perforation (5) of the flange by press fit.

Abstract: Carbon or graphite tubes which are mutually connected by bonding are less highly stressable than individual tubes. A sleeve formed of fibers is drawn on to the connection location of the tubes. An intermediate section of the sleeve is firmly connected with the tubes. Foils are introduced between end sections of the sleeve and the tubes. The foils are displaceable in the direction of the tube axes. This structure increases the resistance of the connected tubes to stress. The strength reduction factor of the connection is about 10% as compared to the tubes alone.

Abstract: A structure for connecting a branch pipe in a high-pressure fuel manifold employs a nut to fasten the branch pipe to a main pipe, the nut having threaded surfaces which are simultaneously brought into thread engagement with a collar member fitted on the branch pipe at the neck portion contiguous with the top joint portion thereof which is brought into contact with the main pipe and with a coupling member which is secured to the main pipe in such a manner as to surround the peripheral wall thereof. Therefore, it becomes unnecessary to conduct a welding operation which has heretofore been needed to connect the joint portion of the branch pipe to the main pipe. The connecting structure satisfactorily endures ultra-high fluid pressure even under vibrations. In addition, there is no fear of fuel leaking out through the joint nor risk of the branch pipe coming off.

Abstract: A fatigue-resistant threaded connector for connecting adjacent sections of a tubing string subject to cyclic dynamic stress variations is disclosed. The connector comprises a pin member which is threadedly engageable with a corresponding box member. In its preferred embodiment, the connector is radially preloaded. The connector has tapered threads with a straight load path having substantially no eccentricity. The preferred thread form is a modified buttress thread having a zero (or near zero) degree load flank, a 45 degree stab flank, and a large root radius. Additionally, the thread may include a small stab flank relief to reduce stress concentrations, and a differential between the pitch of the pin threads and the pitch of the box threads to compensate for the Poisson's ratio effect of the radial preload. The connector utilizes an elliptical stress relief groove at the base of the pin threads and elliptical contours on all thickness transitions to reduce peak stresses.

Abstract: An ultrasonic surgical aspirator having an improved irrigation/aspiration manifold and components to facilitate quick connections of the irrigation and aspiration lines to a handpiece. In combination with a handle assembly having an ultrasonic vibrator for vibrating an ultrasonic tip and a nosecone, a nosecone extension defining a rotating joint for connection to the nosecone in an articulating joint for connection to a rigid or flexible flue is provided. The nosecone extension further defines an irrigation cowl having an irrigation port for receiving an irrigation connector for connecting the irrigation fluid to the nosecone extension for passage of irrigation fluid through the nosecone extension and a flue about the surgical tip. An aspiration tubulation connector adapted to securely fit a slot through the nosecone and nosecone extension connects an aspiration port on the tip to the aspiration tube for connection to a pump into a discard area.

Abstract: Pipe joints, particularly a restraining joint for use in bell and plain pipe end assemblies. The joint includes a gland having a conical axial aperture which encircles the plain end of the pipe; a split ring also encircling the plain end of the pipe is set in juxtaposition with the gland and this ring includes a peripheral flange which seats in the gland. The split ring has a conical exterior complementally engaging the conical axial aperture in the gland and a plurality of pipe gripping teeth defined in its inner surface. A compressible gasket is interposed between the split ring and the pipe bell. The restraining joint is particularly effective in joining plastic pipe and bell assemblies.

Abstract: A quick connect and disconnect coupling includes a connetor for housing a fluid conduit. The conduit includes a flexible tube terminating in an upset bead. One or more adjoining O-ring seals encircle the tube adjacent the upset bead. The connector includes a plug for receiving the tube. The plug terminates in an end wall adjacent the O-rings. A first chamfer is provided in the plug end wall. A second chamfer is provided in the upset bead adjacent the O-ring seals. During installation and removal of the connector, the O-rings are compressed and forced into the first and second chamfers to retain the O-rings in place on the tube.

Abstract: This pipe joint for connecting pipes made of non shrinkable plastics, preferably polybutene, comprises a sleeve body which has a tapered inside surface facing the pipe end and mating the outside surface of the pipe end. The joint is made by the action of heat on the joint-forming region, e.g., by means of a heating element, which is embedded in the sleeve body. This causes a homogeneous joint to be formed between the sleeve body (3) and the pipe ends (1 and 2). To make the joint, the sleeve body is made to have a defined taper on its inside surface. The pipe end to be inserted is made to have a corresponding taper and is inserted into the sleeve body (3) until no clearance has been left between them and an interference fit has been achieved. The heat source is then energized for a defined time so that the inside surface portions of the sleeve and the outside surface portions of the pipe end melt and the materials forming the sleeve body (3) and the pipe ends (1 and 2) form an intimate, homogeneous joint.

Abstract: Coupling components are disclosed for coupling together tubes and the like including male and female coupling components. The female coupling component described herein includes inner and outer tubular sections, and the inner tubular section includes an orifice having a size adapted to frictionally engage a male coupling component inserted therein. The outer tubular section is adapted to frictionally engage the outer surface of the inner tubular section, and the outer tubular section is substantially rigid, while the inner tubular section is substantially flexible as compared to the outer tubular section, so that axial movement of the outer tubular section when it is being coupled to the male coupling component carries the inner tubular section therewith.

Abstract: Coupling device and method for joining together tubular elements such as sections of aluminum tubing. The device comprises a coupling sleeve having conically tapered walls of diameters corresponding to the diameters of the tubular elements to be joined together. The tubular elements and the sleeve are pressed together to form a rigid structure in which the tubular elements are aligned axially of each other and the walls of the coupling sleeve are in tight frictional engagement with the walls of the tubular elements.

Abstract: A swivel joint for connecting fluid pipes includes a plurality of elements placed one upon another. Each element includes a cylindrical stationary portion and a cylindrical rotatable portion surrounding the stationary portion and supported rotatably thereon by a pair of vertically spaced apart sliding bearings. The two portions define therebetween an annular fluid passage having a fluid inlet to which a pipe is connected and a fluid outlet to which another pipe is connected. The rotatable portion has a pair of inclined edge surfaces. Each bearing has an inclined edge surface which is complementary to one of the inclined edge surfaces of the rotatable portion and which cooperates therewith to align the axis of rotation of the rotatable portion with the center of the stationary portion. The two portions have therebetween a clearance for absorbing any positional variation by thermal expansion thereof relative to each other.

Abstract: The clearance-free fit for cylindrical mountings, in particular photographic lenses, is produced by recesses in the inner wall of a main mounting and projections in the outer wall of an individual mounting, to be fastened in the main mounting by inserting and by a relative rotary movement between the two mountings. The recesses and the projections are of such a configuration that a sufficiently large clearance s is present when the individual mounting is inserted, and this clearance is removed by turning to produce a frictional connection.

Abstract: A novel plastic mold and method is disclosed for forming a Luer nut which has a polygonal internal cross-section. The mold includes both movable and fixed cavity sections, so that a non-round threaded core can be unscrewed from within the Luer nut.

Abstract: An assembly for axially coupling male and female tubes including a nut having internal threads on a polygonally shaped inner surface at one end that can be screwed onto a projection on one of the tubes so as to draw a collar at the other end of the nut into axial contact with a shoulder on the other end of said tubes so as to draw the tubes together, the said projection being such as to ride in said threads at points along the surface of at least one side of said polygon so as to bend it outwardly from its unstressed position.

Abstract: An injection line connection for internal combustion engines having for each pressure connection a connecting fitting which hitherto was upset out of the material of the injection line but which is still defective and which can be pressed by a cap nut, by way of a pressure ring, against an internal taper portion of a connecting member which carries the cap nut, is also suitable for thinner injection lines, free of disadvantages, by virtue of the following features, some of which are known and which are reproduced here by way of abstract:(a) the injection line (1) is a wall thickness in the range of from 1/5 to 1/3 of its outside diameter (D);(b) each pressure ring (6) is provided with a support projection (10) which is rounded off at the end towards the connecting fitting and which is of a tapered configuration along its outside periphery, while the associated connecting fitting (3) comprises the end of the injection line (1) which is flanged over outwardly about the support projection (10) and there forms th

Abstract: In a fluid-tight coupling comprising a male fitting (1) having an axial channel (2) issuing to the outside via a radial opening (3) and forming the first section of the fluid line, said coupling requiring the male fitting to penetrate into a bore (6) in a mating part (5) containing the second section of said fluid line (4) issuing into the bore in line with the radial opening (3) when coupling is made and the male fitting (1) carrying two seals, located respectively above and below the radial opening, an improvement protects the seals against damage on insertion, wherein the upper seal (8) is secured between a conical shoulder (10) on the male fitting and a sliding ring (11) around the fitting, having a radial through-hole (17), the lower seal (9) is secured between same said ring and the conical top surface (12) of a sliding bushing (13) fitted over the end of the male fitting and the bore of the mating part has a shoulder (19) such that at the time of coupling the bushing (13) bumps said shoulder (19) and s

Abstract: A press fitted coupling device for fluid flow systems having fluid flow conduits with luer type connectors thereon such as those systems as are used in medical and surgical applications acts to convert a luer type male connector to a male luer lock fitting by means of an internally threaded annular collar having an annular locking member preferably disc shaped snap fitted therewithin. The inner periphery of the locking member is sized and dimensioned to slip over the male luer type connector on one of the fluid flow conduits and to engage an anchor thereon adjacent the root section of the male luer type connector so as to hold the coupling device in assembled position.

Abstract: A reversible lock and seal apparatus for coupling swimming pool piping and fittings, comprising a frusto-conical U-cross section metal ring with longitudinally spaced circular rows of teeth, adapted to be cammed into piping by a follower coupled to the fitting for locking the piping to the fitting without need of piping threads or solvent cements, and squeezing a seal ring therebetween.

Abstract: A luer connection device in which a male luer connector includes an outer sleeve that is slideable up a tapered wall so that compression between the outer sleeve and the tapered wall increases as the outer sleeve moves forwardly. An outwardly extending flange is carried by the body of the male luer connector for cooperation with the outer sleeve, to enable the outer sleeve to be unscrewed from a female luer connector without relative rotation of both the main portion of the male luer connector and the outer sleeve.

Abstract: A medical instrument, comprising a female connector member incorporating a female taper portion capable of being joined to a medical instrument member having a male connector member incorporating a male taper portion and a ring member provided to said male connector member so as to encircle said male taper portion and having at least one threaded ridge formed on the inner circumferential surface thereof, which medical instrument is characterized by having formed on the outer periphery of said female connector member at least one threaded groove capable of being helically fitted on said threaded ridge of said ring member and having formed at a desired position in said threaded groove a rib adapted to engage with said threaded ridge when said threaded groove is being helically fitted on said threaded ridge.

Abstract: There is described an insulating connector for the wellhead of an electrode well used for heating a subsurface formation by electrical power dissipation in the formation. The insulating connector has two iron base metal fittings (for example, steel flange halves) heat shrink fitted to a piece of ceramic pipe with a nonferrous second metal between the outer surface of the ceramic and the inner surface of the metal fittings. The nonferrous metal (for example, copper) has a lower yield than steel and a higher thermal expansion coefficient than the iron base metal and deforms, compensates and distributes the stresses caused in the shrink fitted members by the differences expansion between steel and ceramics.

Abstract: A universal connector for a fluid flow conduit comprises a tubular connector for attachment at one end to the fluid flow conduit and defining a luer taper tube portion at its other end. A sleeve is carried by and surrounding the tubular connector in relatively rotatable relation thereto. The sleeve defines internal threads for threaded locking connection with another connector. A tubular member having external threads at one end is locked by said external thread in removable threaded locking connection with the internal threads. The tubular member defines at its other end an aperture for sealingly receiving a spike connector.

Abstract: The invention relates to a pile construction comprising a number of steel tube sections (1) that are joined together. Each tube section (1) is formed with joining portions (2, 4) in its respective ends. One joining portion is constituted by a male end (2) having a conical envelope surface (3) and the other portion by a socket end (4), the interior surface (5) of which is conical in correspondence to the conicity of the male end (2). When the tube sections (1) are joined the male end (2) of one section interacts with the socket end (4) of the next section, so that a stiff joint is obtained.