Abstract: A four component sewer coupling arrangement for recreational vehicles and the like is disclosed including a recreational vehicle sewer outlet fixed to the vehicle, a threaded closure cap for closing the outlet when the vehicle is in transit, a tether line connecting the closure cap and outlet so that the closure cap is not inadvertently lost or mislaid, and a flexible drain hose having a threaded connector at one end for connecting the drain hose to the outlet when the closure cap is removed so that an end of the flexible drain hose opposite the threaded connector may be connected to a sewage disposal location for discharging sewage from the recreational vehicle by way of the flexible drain hose to the sewage diaposal location. A quick release spring coupling may be substituted for the threads. Both the closure cap and threaded connector are provided with means for facilitating their tightening and loosening relative to the fixed outlet thereby providing a good seal to the outlet.

Abstract: A compensation device for deep-well drilling tools with a transversely divided outer pipe, the pipe members (1 and 2) of which can be rigidly connected to one another by a screw thread (8) and comprise adjacent end faces (5 and 6) as stop faces which approach one another when the pipe members are screwed together and move apart from one another during the unscrewing, comprises a spacing member (3) which can be inserted radially, from the outside, between the end faces. The screw thread (8) has a length of engagement which secures the firm connection between the pipe members within the whole preset compensating range.

Abstract: Threaded pipe joint in which tip of the male member engages shoulder within the female member and any excess in the outer diameter of the male member over the corresponding inner diameter of the female member is so small that the hoop stress in the female member does not exceed the axial stress therein.

Abstract: A composition suitable for pipe jointing compounds is provided, which composition contains synthetic fibres, such as PTFE, FEP, polyethylene or polypropylene in admixture with a suitable carrier.

Abstract: A pipe joint and threaded pin and box members adapted for use therein are disclosed in which two-stepped thread surfaces are axially separated by dissimilar angled positive angle torque and sealing surfaces and internal and external sealing surfaces are provided on both ends of the threaded surfaces. Protective non-engaging shoulders are provided adjacent the external sealing surfaces. Cooperating end shoulders are provided on the end of the pin member and the interior end of the counterbore of the box member. Preferably the end shoulders are provided approximately perpendicularly to the internal sealing surfaces, the box end shoulder acting to trap the pin end shoulder under conditions of high joint interior pressure.

Abstract: A fitting for connecting a helically corrugated heat exchanging tube to a source of heated fluid, the fitting having a plastic tubular member with an end adapted for connection to the source and an end with external helical threads formed on it, the threads being sized to provide a close clearance with the interior surface of the corrugated tube.

Abstract: A seal for use in an underwater connector having first and second mating members each of which has a coacting mating surface with a plurality of fluid passageways for mating with the passageways of the other member. The seal is a resilient tubular member having threads on a portion of its outer diameter for connection to a passageway on one of the members. The seal includes a fluid sealing surface on its outer end for mating with the other member and the seal includes a fluid sealing surface on its inner end for sealing with the one member. The sealing point of the sealing surface on the outer end has a diameter at least as great as the diameter of the sealing point of the sealing surface on the inner end. The sealing surface on the inner end is formed by an O-ring seal in a groove in the annular resilient seal. The sealing surface on the outer end includes a ridge.

Abstract: The thread of tubing to be used in the oil and gas industry and possibly additional services such as fee ing surfaces are cleaned, degreased, and pickled, nickel-coated without electric current at a layer thickness of about 1 micrometer, followed by electrolytic plating, preferably tin-plating, followed by storage at a temperature within the range from 150.degree. to about 200.degree., which is followed by brief heating for melting the tin coating, whereupon the article is quenched.

Abstract: An improved pressure type connection on stepped thread Hydril-type tubing and casing tool joints is disclosed, wherein a secondary sealing means is included between the stepped threaded areas of the Hydril-type connector. The secondary sealing means includes an annular ring of relatively rigid, internally tenacious plastic or rubber material, which serves to contain well pressure if the metal-to-metal sealing surfaces on the pin and box members of the Hydril-type connector are damaged. With such secondary sealing rings, damaged Hydril-type connectors can still be used, without having to scrap same, or having to repair the damaged area at great expense.

Abstract: A threaded coupling chuck device for use with a female threaded tube, including a chuck body, adaptor means, probe means, seal means, and port means.The body has an axis of rotation and shaft means for rotation, centered about said axis. Adaptor means are mounted on the body and have a threaded portion for engagement with the threaded tube to form a threaded coupling upon rotation of the internal portion of said body in a first direction about said axis. Probe means are slideably mounted in contact with the adaptor means and are positioned to align the respective threaded portions of said adaptor and said tube.Seal means are included, and are positioned to prevent passage of fluid through the coupling. The seal includes a threaded annular portion of the adaptor means, which portion is adapted to expand into contact with the tube upon activation. The seal means includes piston means positioned to glide along the axis from a first position to a second position where the seal is activated.

Abstract: A fastening assembly includes:(a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members to be interconnected, and(b) structure extending at the side of the fastener and having interconnection therewith characterized as facilitating transmission of torque to the fastener to rotate the fastener about the axis while allowing relative axial displacement between the fastener and the structure, whereby the threaded portions are then adapted to threadably interfit the threaded extents to make-up the assembly.

Abstract: A pipe joint in which a metal-to-metal seal is provided on the exterior of the pipe, a torque shoulder provides a further metal-to-metal seal and a still further seal is provided by a resilient ring. The box is protected against ballooning which might result in jump out of the threads by proportioning the thickness of the box at the point of seal at the maximum diameter of seal to the outer diameter of the box as compared to the full wall thickness of the pipe related to the outer diameter of the pipe.

Abstract: A pipe joint with premium threads having both metal-to-metal and polymeric seals to block fluid leakage through the joint. A polymeric seal ring is preferably carried within an annular groove in the box end. Metal sealing surfaces, each having a different inside diameter, are provided on opposite sides of the annular groove to form metal-to-metal seals with two compatible metal sealing surfaces on the exterior of the pin member. The joint is thus characterized by two metal-to-metal seals formed on opposite sides of the annular groove to trap the seal ring therebetween. The metal-to-metal seals cooperate to prevent undesired extrusion of the seal ring.

Abstract: A connector for a liquid tight, flexible electrical conduit formed of a plurality of interlocking, thin, arcuate metal ring sections having an interior wall of alternating ridges and grooves. The connector includes a ferrule end insertable into the conduit with a plurality of spatially separated arcuate segments matching the conduit grooves for threadable engagement. A resilient seat member snug fit onto the ferrule is engaged by the conduit end as the conduit is threaded onto the ferrule to sealingly terminate the full perimeter edge of the conduit end, thereby enabling the conduit and connector assembly to be air and liquid tight. One or more ramp formed barbs are provided on one or more of the ferrule arcuate segments to lock and secure the connector on the conduit and prevent undesired loosening.

Abstract: A closure assembly is provided for high pressure applications. It includes a hollow cylindrical member having a beveled end for welding to a pressure vehicle and a threaded end for receiving a cap. An annular projection extends from the threaded end and includes a O-ring for sealing purposes. The projection has relatively thin walls which allow it to dilate under pressure and provide an excellent seal.

Abstract: Connections for attaching together successive sections of an axially driveable pile, including pin and box ends having engaging threads which are tapered and which as viewed in axial section have opposite side faces both disposed at a very small angle of not over about 5.5 degrees with respect to a line extending perpendicular to and intersecting the axis of the threaded connection, preferably between about 4.5 and 5.5 degrees, so that the threads can take very high axial driving and rebounding forces. Each thread desirably has an axial thickness at its pitch line at least about one and one-half times the height of the thread from its root to its crest. The pin and box elements preferably do not have shoulders engageable to limit the extent to which the parts can be screwed together in the fully made-up condition of the joint.

Abstract: A pipe joint in which a metal-to-metal seal is provided on the exterior of the pipe, a torque shoulder provides a further metal-to-metal seal and a still further seal is provided by a resilient ring. The box is protected against ballooning which might result in jump out of the threads by proportioning the thickness of the box at the point of seal at the maximum diameter of seal to the outer diameter of the box as compared to the full wall thickness of the pipe related to the outer diameter of the pipe.

Abstract: A coupling comprises a sleeve shaped member (5) which has an external toothing (11), an internal threading (12) and also a tubular guiding portion (13). An annular member (14) surrounding the toothing (11) is rotatably mounted over the sleeve shaped member (5) and has a handle (28) and a reversible catch (22) to engage the toothing. A coupling member (29) to be threadingly connected to the sleeve shaped member (5) has for that purpose an external threading (30) as well as a saw tooth shaped, peripheral bead (31) to obtain a guide function by cooperation with the tubular guiding portion (13). A further coupling member (1) is rotatably but non-displaceably connected to the sleeve shaped member (5) and has in the end surface thereof a groove (3) having a dovetail section and an O-ring (4) inserted thereinto.

Abstract: A replaceable tubular threaded connector for interconnecting two tubular sections having an elongate tubular body formed having an axial inner bore therethrough, the tubular body having an upper threaded end and a lower threaded end, wherein the tubular body is adapted to be threadedly mounted between adjacent tubular sections.

Abstract: Thread joints in explosion-proof electrical fixtures for hazardous areas must relieve the momentary pressure from an internal explosion without flame propagation to the exterior. Ordinary paint on the threads cannot be used due to variations in thickness which alter the flow characteristics and the cooling effects. The invention provides a dense, pinhole-free paint layer uniform in thickness within .+-.15% which can be achieved by electrodeposition. Such a coating facilitates assembly and inhibits deterioration of the clearance path through corrosion but has only a minor effect on the venting relief.

Abstract: A seal assembly for downhole use in a subterranean well comprises inner and outer concentric annular sealing elements adapted to seal between an inner mandrel and an outer housing. The sealing elements are mounted in concentric annular recesses defined in relatively axially movable seal carrier members. In a preferred form, a spring loaded mechanism is provided to bias the seal carriers axially towards each other, thereby exerting an axially compressive force on the sealing elements between them. The compressive force is sufficient to expand the sealing elements against the sealing surfaces of the mandrel and outer housing, whereby non-elastomeric sealing elements, or seal elements which have become effectively non-elastomeric, can be utilized. Releasable latches are provided for attachment of the seal assembly to the associated housing.

Abstract: A new and improved threaded connector having one or more non-tapered threads on separate diametral steps with at least one flank "hooked" so as to achieve a tensile strength approximately that of the tubular body, is disclosed. The wall thickness of the female member is controlled to improve thread loading and enable inwardly radial movement with the male member to prevent "pulling out" under axial tensile loading. The outer thread step on the male member may only partially engage the threads on the female member such that the critical reduction of the tube wall thickness at the thread roots is a minimum. The resulting threaded connection formed on tubular members has a tensile efficiency in excess of the tube body yield strength and approaching that of the tube body ultimate tensile strength.

Abstract: A yard hydrant includes an improved valve assembly connecting the hydrant standpipe at a point below the frost line to a source of water under pressure. A hollow and generally cylindrical housing of such assembly is provided with a bore concentrically reduced relative to the diameter of the housing and having an upper plane spaced inwardly from the upper end of the housing to receive a rod mounted and handle operated valve. The bore terminates at its lower end in a valve seat defining a further concentrically reduced access opening to the water supply. In spaced concentric relationship about the bore are a plurality of water passageways each in communication with said bore and each extending from the upper plane thereof for communication with the standpipe to a point spaced above the valve seat so that the bore is full circle only intermediate the valve seat and the lower limits of the passageways. A drain hole is provided through the housing to the bore near the upper plane thereof.

Abstract: An insulated casing assembly for use in injecting steam into wells, comprising a plurality of interconnected casings, each casing having outer and inner tubular sections, an annular spacing between the two sections containing multilayered thermal insulation enveloped in a low conductivity gas, and tubular bellows connecting and allowing relative movement between the corresponding ends of the two inner sections. A leak-proof connection between adjacent casings includes a diffuser sleeve fitted tightly over the ends of adjacent inner tubular sections, a filler ring fitted on the diffuser sleeve and disposed between adjacent outer tubular sections, and a threaded coupling screwed onto threaded ends of outer tubular sections of adjacent casings.

Abstract: An adjustable pipe union for tubing strings including an outer lower mandrel, an inner upper mandrel threaded along a lower end portion into the outer mandrel, packing between the mandrels, an annular seal chamber between the mandrels, a metal-to-metal seal assembly between the mandrels, and a jam nut threaded into an end portion of the outer mandrel around the inner mandrel against the metal-to-metal seal expanding the seal to lock the members together and seal between the members. A short embodiment of the union permits rotational orientation of tubing string apparatus such as valves. A longer embodiment of the union performs a spacing-out function for fitting a tubing string assembly between longitudinally spaced fixed members such as two packers.

Abstract: A fastening assembly includes:(a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members to be interconnected, and(b) structure extending at the side of the fastener and having interconnection therewith characterized as facilitating transmission of torque to the fastener to rotate the fastener about the axis while allowing relative axial displacement between the fastener and the structure, whereby the threaded portions are then adapted to threadably interfit the threaded extents to make-up the assembly.

Abstract: A pipe coupling has a main body including (a) a threaded portion adapted for threaded engagement with an inside-coated pipe having a mating threaded end portion, (b) an annular groove and (c) an annular projection, the members (a), (b) and (c) being located on the inside circumferential surface of the main body in this recited order from each open end of the main body toward the central portion thereof, a short cylindrical body having one end abutting the annular projection and being mounted within the main body, and an annular packing mounted within the space defined by the threaded portion (a), said annular groove and the peripheral surface of the cylindrical body. A pipe joint connection is provided by threadedly engaging inside-coated pipes with the threaded portions of the coupling. The pipe coupling of the invention permits a leakage-free pipe joint connection on the job by simply threading inner-coated steel pipes and threadedly connecting these pipes through the coupling.

Abstract: Pipe joint components such as a metallic sleeve and companion nut of a compression-type pipe coupling are externally coated with a corrosion-resistant polymeric plastic. In a preferred embodiment the coating on the female of the components extends as a flexible skirt beyond the mating end face thereof to include an internally integral annular O-ring formation. The coating on the male fitting terminates behind the threads thereof in an annular ramp or boss adapted in assembly to be engaged by the O-ring coating formation of the female fitting. Cooperation of the engaging O-ring and ramp effects a moisture seal relation thereat.

Abstract: Tapping apparatus is provided for cutting an opening in the wall of a conduit and providing fluid tight communication between such opening and a second conduit via a rotatable outlet to facilitate alignment and connection of the second conduit to the tapping apparatus.

Abstract: Pipe connection comprising "Hydril" type pin and box connectors with an annular groove formed in the pin connector at the juncture of the inner cylindrical land and the inner tapered seating surface and a seal ring of preferably circular cross section, e.g. an O-ring, disposed in the groove sealing between the pin connector and the box connector.

Abstract: An adjustable coupling device is provided which can be secured to each of two sections of conduit, such as two hoses or pipes, by hand, without the need for employing tools. The coupling device comprises a socket member and a plug member which are adapted to be adjustably positioned with respect to each other as one or both members wear, said plug member being adapted to be removably and adjustably disposed in said socket member. The above plug member includes interior walls which define a bore, and securing means, such as teeth or recessed portions. The socket member comprises a body portion having a bore running therethrough defined by the interior walls thereof, which bore is adapted to receive said plug member in a manner such that the bore of said plug member is in communication with the bore of said socket member, and at least one connecting member attached to said socket member and adapted to engage said securing means of said plug member.

Abstract: Pipe joint pin and box members have interengageable two-step threads and interengageable annular shoulders for preventing radial and axial separation of the members.

Abstract: A pipe section is provided having means on the end thereof for use in assembly in the section in series in a pipe system. The pipe section has a compressible seal mounted in a groove in the end. A frusto-conical shaped seal surface is formed on the interior of the female end adjacent the threads. The apex angle of the frusto-conical sealing surface, the lead of the screw threads and the allowable diametric clearance of the seal means are related to provide a pipe joint which allows 360 degrees or a full turn of relative rotation between coupled sections while providing an effective seal therebetween. The compressibility of the seal, the apex angle of the sealing surface and lead of the screw are also related to provide a makeup torque for interconnecting the sections which is in the range which can be applied by an ordinary worker by hand to the section without tools. Indicia means are provided on the exterior of the pipe to indicate allowable interengagement of the sections for effective sealing.

Abstract: In making a quick connection and hermetic seal for coupling low pressure systems of a type such as heat pipes and the like, a pre-installed fitting forming the sealing portion of a quick connection assembly is disposed in a depression formed in the sidewall of the low pressure chamber so that the chamber and the sealing portion of the connecting assembly can be fully processed together. The open end of a second system is coupled into the inserted sealing fitting by means of threads formed about a pipe plug device and carried by the tubular end portion of the second system.Sealant applied between the threads of the plug and fitting so that as the plug advances along the fitting a gas-tight seal will be obtained. The fitting includes a sealing membrane disposed across the inserted end thereof to be upset by advancing movement of the tubular end portion carried by the plug.

Abstract: An extendible ballcock assembly including a support pipe threaded at its lower end for partial receipt in a support fitting.The support fitting furthermore includes a peripheral cavity in the upper end thereof adapted to receive a toroidal seal. The seal includes a threaded interior surface conformed to the support pipe threads and is compressed into the fitting by a compression nut. At the upper end the support pipe terminates in a valve assembly which includes antisiphoning provisions.

Abstract: A liquid tight closure for containers comprising a threaded neck secured about a suitably formed opening in a container wall section. An annular sealing gasket is formed in situ on the exposed surface of the terminal thread area remote from the neck mouth. A closing member threadedly engages the container opening neck with the starting thread area of the closing member in sealing engagement with the neck gasket thereby sealing off the thread engagement upon full seating of the closing member.

Abstract: Pipe joints for a large diameter casing, which are lowered inside an oil well or the like and are successively connected to one another, are subjected to critical conditions such as load on the casing when suspended, and pressure. A pipe joint of this class is also required to provide torque during the connecting operation and sealing capability after connection. Tooth profiles or thread configurations formed in the pipe joints welded to the intervening large diameter tubular member extend over at least three sections. In the first section, each of the external threads is engaged with each of the internal threads in such a manner that its crest and root are fully meshed to allow its butt face to abut against its back pressure face. In the second section adjacent the first section, the threads are so formed as to involve an easy transition to the thread configuration formed in the third section where the threads are so shaped that the external threads are readily meshed with the internal threads.

Abstract: An improved pressure type connection on stepped-thread Hydril-type tubing and casing tool joints is disclosed, wherein a secondary sealing means is included between the stepped threaded areas of the Hydril-type connector. The secondary sealing means includes an annular ring of relatively rigid, internally tenacious plastic or rubber material, which serves to contain well pressure if the metal-to-metal sealing surfaces on the pin and box members of the Hydril-type connector are damaged. With such secondary sealing rings, damaged Hydril-type connectors can still be used, without having to scrap same, or having to repair the damaged area at great expense.

Abstract: A pipe fitting comprising interconnected threaded male and female members. A fitting element in the form of a non-metallic ring is defined by a tubular body, a radial flange and a sealing portion extending from the radial flange. The tubular body of the ring is adapted to be inserted into the male member such that the radial flange overlies the end wall of the male member. The outer periphery of the sealing portion of the ring has a diameter greater than the minor diameter of the threads of the female member. As a result, a part of the sealing portion is caused to be captured between opposed thread flanks of the male and female members upon make-up of the fitting thus providing for enhanced sealing at the threads of the fitting. In addition, the ring serves to isolate the end wall of the male member from contact with fluid thus making the fitting advantageous in the embodiment in which a non-metallic lining is provided in the male member.

Abstract: An air line connector for use on an automatic coupler having a combination seal in the form of an apertured seal holder containing annular grooves in a front and rear face with seal members therein and a locating seal member about the diametral periphery of the holder.

Abstract: A plumbing valve having a plastic body with a lateral outlet and adapted for threaded connection with a metal pipe and including a resilient seal engaged and compressible upon connection of said valve body and pipe to maintain a seal therebetween incident to varying rates of expansion and contraction of said valve body and pipe with temperature changes. The valve has a rotatable actuator with an eccentric longitudinal part mounting a resilient tube having a portion pressed into contact with the cavity of the body to seal the outlet in one position and a second longitudinal part spaced from said concentric part and cooperating therewith to confine a part of said tube against radial expansion incident to liquid pressure from said metal supply pipe and retaining said tube against endwise displacement on said eccentric part.

Abstract: A pipe branch fitting has a cylindrical body freely slidable along the pipe to a point where a hole is pre-cut in the pipe. On one side, the cylinder carries a screw-threaded tubular insert on which the branch is to be connected. A gasket between the insert and the pipe gives a seal as the insert bears upon it as the insert is tightened up. The inner end of the insert has a stepped shoulder which abuts the periphery of the hole in the pipe and limits the compression applied to the gasket. The reduced diameter end of the insert locates itself in the hole and indicates if the fitting is misaligned with the hole.

Abstract: An elongated fitting, which forms a thread as it is screwed onto the end of a conduit, has an internally threaded tubular portion at one end which receives the conduit. A stem portion on the opposite end permits coupling of the fitting to external parts. An intermediate portion is provided for rotating the fitting relative to the conduit. A longitudinal slot axially extends along the wall of the tubular portion to permit visual inspection of the amount of conduit inserted in the fitting and for lowering the tightening torque required for forming the threads on the conduit.

Abstract: A length of pipe conduit is provided for forming a joint arrangement on each end with adjacent lengths of like pipe or conduit. The length of pipe is formed of plastic with a structurally rigid wall having a middle portion presenting exterior circumferential reinforcing flanges at spaced intervals along the length of the pipe and longitudinal reinforcing ribs at spaced intervals about the exterior of the pipe. One end of the length of pipe has a round tubular wall presenting a sealing gasket and male section with thread rib segments. The other end of the length of pipe has a female section with thread groove segments for receiving and threadingly engaging the male section of a similar length of pipe. The thread rib and thread groove cross-section profiles are triangular.

Abstract: This invention provides a substantially tubular sealing insert for use with a sucker rod for an oil well and a coupling adapted to engage the end of the sucker rod. The coupling has internal threads engaging external threads of the sucker rod, and the latter has an outward flange spaced from said external threads. The coupling has a part extending beyond the internal threads adapted to abut the flange and to define with the sucker rod an annular space located longitudinally between the threads and the flange, the annular space having a first section substantially parallel with the sucker rod axis and a second section extending radially outwardly adjacent the flange. The tubular sealing insert is of resilient material inert to the oil well environment, and is adapted for location in said annular space. The insert has at one end a flared portion adapted to be trapped in said second section of the annular space to seal the same.