Abstract: Pipes are securely connected by an annular gasket. The gasket includes an inner portion, an outer portion situated radially outwardly of the inner portion, and a resilient connecting portion for connecting the inner and outer portions at one side of the gasket. The pipes to be connected includes male and female pipes. The male pipe has a first engaging section to be engaged with the inner portion of the gasket, and the female pipe for receiving therein the male pipe has a second engaging section at one side thereof. The second engaging section engages the outer portion of the gasket while restricting movement of the gasket when the gasket and the pipes are engaged together.

Abstract: A pipe joint comprises a pair of tubular joint members made of a metal and each having an abutting end face, an annular gasket made of a metal and interposed between the abutting end faces of the respective joint members, a nut joining the joint members together and a retainer holding the gasket to one of the joint members. The joint members are made of stainless steel and silver white. The retainer is made of stainless steel and colored blue so as to be discernible from the joint members. The joint can be checked for the presence of the retainer, accordingly for the presence of the gasket, merely by discerning whether the color seen through an inspection window is blue or silver white.

Abstract: A method of forming a metal-to-metal seal in high pressure applications with low contact stress. Firstly, providing a first elongate pressure containment member having a surface of revolution. Secondly, providing a second elongate pressure containment member having an exterior surface, an interior surface, a remote end, and a thin walled extension sleeve having a first end and a second end. The first end of the thin walled extension sleeve is conjoined with the second elongate pressure member at the remote end. The second elongate pressure containment member is of a greater thickness than the sleeve. Thirdly, coupling the first elongate pressure containment member and the second elongate pressure containment member with the sleeve positioned in close relation to the surface of revolution.

Abstract: An undersea hydraulic coupling having a metal seal with a Y-shaped cross section that provides a face type seal between the male and female coupling members is disclosed. The inner circumference of the Y-shaped seal remains engaged with the face of the male member even when there is partial separation of the members, without any pre-loading devices. If the male member is partially removed from the female member bore, a face-type seal is maintained with the face of the male member and a sliding radial seal is maintained with the receiving chamber wall. The seal slides with the male member as it is partially withdrawn from the female member receiving chamber.

Abstract: A hydraulic coupling having a lower tubular member and an upper tubular member for sealing engagement one with the other. The lower and upper members are maintained in axial engagement by an axial load. The lower member and the upper member each have an annular body having an axial bore therethrough for the passage of fluid. A metal, concentric inner annular seal leg and outer annular alignment leg extend from the body of the upper member, defining an annular sealing recess between the seal legs. An annular metal sealing portion or wall extends from the body of the lower member and has an inner diameter that defines a sealing surface for insertion into the sealing recess for sealingly engaging the inner annular seal leg. The sealing recess has a backup elastomer ring, which is axially compressed by the sealing portion. When the couplers are made up, the metal-to-metal seal is achieved due to an interference fit between the coupler halves.

Abstract: The invention relates to a sealing unit for a fuel pressure sensor for sealing an at least virtually flat sealing joint between the sensor and a component that carries it via a screw connection, wherein a round sealing washer with a central bore is disposed between the threaded bolt-shaped end of the sensor housing with its central sensor bore and the bottom of the threaded bore of the component with its central pressure fluid opening. A pin is formed onto the threaded bolt-shaped end of the sensor housing, which pin centers the sealing washer, fixing it in a positive and/or frictional, non-positive manner, and rises above an end face that serves as a bearing surface for the sealing washer. The pin ends in an end face and has a length that is shorter than the thickness of the sealing washer. A sealing unit is produced that assures a reliable sealing function and permits a simple installation and disassembly of the sealing washer while reclaiming the sealing washer in a sealing position.

Abstract: A dual seal is provided for establishing fluid tight engagement between conduits subjected to both internal and external pressure. The dual seal comprises four seal portions disposed between an inner and an outer cylindrical surface.

Abstract: An expansion joint seal between a gas turbine exhaust duct and an axially adjacent exhaust ductwork comprising plural layers of axially adjacent layers of flexible seal plates, each layer comprising a plurality of arcuate segments which together form a 360.degree. annulus; and further wherein the plural layers of flexible seal plates are secured at one end to the gas turbine exhaust duct, with opposite ends of the seal plates slidably engaged with at least one surface of the exhaust ductwork.

Abstract: A high pressure connector for engagement with a hydraulic conduit for use in high pressure conditions such as downhole in a wellbore. A housing for receiving a conduit end is attachable to a primary retainer. A primary seal and a second seal are positioned between the primary retainer and the housing to provide redundant sealing capabilities. A secondary retainer holds a third seal against the primary retainer. The third seal provides redundant sealing capability and further provides a secondary gripping connection along the conduit length. The secondary gripping connection provides greater tensile strength and reduces the impact of conduit vibration. A test apparatus can be adapted to test the primary seal and the second and third seals before the connector is installed downhole in the well or other high pressure environment.

Abstract: A pressure fluid apparatus includes first and second parts which are adapted to be secured together. A first sealing surface of the first part forms a seal with a corresponding second sealing surface of the second part. The first sealing surface includes a spigot, and the second sealing surface includes a corresponding recess adapted to receive the spigot. The inside corner where the base of the spigot meets the first sealing surface is radiussed, and the outside corner where the mouth of the recess meets the second sealing surface is correspondingly truncated, so as to accommodate the radius. On either the radiussed inside corner or the truncated outside corner, an integral projection is provided which is deformable upon assembly of the parts, to block leakage of fluid along the path defined between the two corners.

Abstract: A thin-walled steel tubing is to be constructed with a double cone coupling nipple for the tight screwed connection with a counterpart by way of a cap screw in a crack-resistant manner. The steel tubing is thin-walled and constructed of high-strength steel. With respect to the remaining tubing area, the nipple has at least partially at least approximately a double wall thickness. The steel tubing is not soft annealed at any point including the whole area of the nipple. With respect to the material, the contact surfaces of the nipple are harder than the surfaces of the countercontact. The cone angle of the sealing surface of the nipple measures over 100.degree..

Abstract: An undersea hydraulic coupling has a male member with a stepped outer body that may be inserted into a female member having a bore which has retained therein three seals and a three part seal retaining member. Two of the seals engage different diameters of the male member, prior to opening of the valves in the male and female members.

Abstract: Each of two coupling members is formed in an abutting end lace thereof with a recessed portion for accommodating a gasket and a retainer therein, and the recessed portion has a retainer holding hollow cylindrical portion formed centrally on a bottom surface thereof and provided on an end face thereof with an annular projection for clamping the gasket. The gasket comprises a small portion and a large portion having a greater outside diameter than the small portion. The retainer is attached to the cylindrical portion of the coupling member with which the gasket small portion is in contact.

Abstract: A fitting is provided for a high purity gas system. The fitting includes first and second components having fluid passageways extending therethrough. Each of the first and second components includes a sealing face having a toroidally generated sealing bead extending unitarily thereabout. At least one nut is provided for urging the sealing faces toward one another. A metallic gasket is disposed between the respective sealing faces. The gasket includes opposed surfaces having annular grooves formed therein. The grooves are dimensioned such that a radially inner circumferentially extending surface on each groove engages a radially inner circumferentially extending surface on a respective toroidal sealing bead. As a result, dead spaces between the fitting and the gasket are eliminated. Additionally, any debris generated as the toroidal sealing beads slide over the gasket are urged outwardly and away from the fluid passages.

Abstract: A coupling assembly for leak proof connection of the ends of two lengths of pipe or tubing. One end of a first pipe is coupled to a coupling box which is connected to or integrally formed on the end of a second pipe. The coupling box has threads for engaging a nut for securing the coupling. The coupling box has a bore for receiving the end of the first pipe. The end of the first pipe has an outer tapered surface for engaging an inner tapered surface of the coupling box to form a metal to metal seal between the first pipe and the coupling box. The bore also contains an engager for coupling the nut to the first pipe. The engager includes a split ring which has a longitudinal slot. The split ring has internal circumferential projections or gripping teeth which are aligned with external circumferential projections or gripping teeth on the end of the first pipe.

Abstract: An improved sealable connector has a geometry which effects reliable sealing upon assembly. The connector is useful, for example, for connecting a pressure sensor to a fuel pump accumulator in a fuel injection system. The connector includes a male member, a female member, and an annular seal disc which compressibly seats between the male and female members. The male member has a tip with a flat annulus at an innermost radius surrounding a fluid-delivery bore. A frustoconical section of the tip extends radially outwardly from the annulus, sloping away from the plane of the annulus at about 5.degree.-15.degree., for example. The female member has a cavity shaped to receive the male member, the cavity having a bottom defined by a flat annular seat surrounding another fluid-delivery bore. The seal disc is compressed between the flat seat of the female cavity and the planar/frustoconical tip of the male member.

Abstract: A casing patch is disclosed which uses one or more fins which elastically flex to accept a casing stub. The casing stub is prepared with a dressing tool containing a special mill to obtain the requisite finish on its outer surface prior to insertion of the casing patch. The flexible fin or fins provide a metal-to-metal seal to the outer surface of the casing patch and a grip assembly holds the joint together. In certain applications, the fins can be combined with a resilient seal where the fins preferably provide a complete extrusion barrier to the resilient seals. Using the fins which preferably are integral to the body, alone or in combination with a resilient seal or seals, the wall thickness of the joint can be maintained at thicker values for a given size as compared to prior designs, thus, ensuring a sufficient pressure rating for the joint which is at least equal to the rating of the casing stub.

Abstract: A sub-sea coupling comprises a female coupler which accommodates a conical metal seal and an adjacent striker constituted by a sliding ring. The female coupler also includes a U-section seal outwardly of the striker. A male coupler has a forward probe with an intermediate part of slightly greater diameter than the extreme forward part. A shoulder between the intermediate and extreme parts of the probe engages the striker to cause the conical seal to flatten and thereby to provide a metal-to-metal radial seal between the female coupler and the male coupler. The U-section seal provides a seal against the intermediate part of the probe before the striker is engaged and is also configured to provide no significant resistance to the ingress of seawater when the couplers are disengaged.

Abstract: Apparatus for handling process fluid, that is a meter includes a mass flow meter block. A deformable metal seal is positioned between the mass flow meter block and a thermal mass flow sensor in deformable engagement with a pair of edges formed thereon to provide a low contamination, high integrity metal seal.

Abstract: FIG. 2A shows an alignment and sealing arrangement for connecting two non-gender opposed conduit parts (20) and (20'). Seal (22) is captured by two opposed seal protrusions (20C) and (20C') residing on conduit part's end. Bore (18A) of alignment element (18) closely receives opposed alignment protrusions located on conduit parts' end. The alignment protrusions are substantially referenced to their respective passageways. Axial force is applied to displace opposed conduit parts toward one another to cause seal protrusions to compress seal, drawing conduit parts' passageways (20E) and (20E') into an aligned relation, and reducing adjacent mating faces into approximate flush relation with one intersection (30). This coupling has one seal removed from direct contact with media, eliminates any appreciable media entrapment space, and desirably reduces flow disturbance along passageways of conduits.

Abstract: A gasket assembly is provided for fluid couplings. The gasket assembly includes a gasket having an outer circumferential surface including arc segments defining a minor outside diameter and a plurality of ears projecting outwardly from the arc segments to define a major outside diameter for the gasket. The gasket assembly further includes a split cylindrical sleeve having a plurality of slots disposed and dimensioned for loosely receiving the ears of the gasket. The sleeve and the gasket are dimensioned such that the ears project outwardly beyond the tube to define gripping protrusions that facilitate mounting and removal of the gasket assembly onto the coupling component.

Abstract: A sealing ring for sealing axially facing annular surfaces having an annular bight portion and annular first and second leg portions. The annular bight portion having a first end and a second end, with an arcuate concave surface and an arcuate convex surface. The annular first leg portion having a first curved section extending from the first end of the bight portion and a second curved section extending from the first curved section to a first free end, the first and second curved sections each having an arcuate concave surface and an arcuate convex surface. The convex surface of the second curved section forms a first annular sealing surface. An annular second leg portion having a third curved section extending from the second end of the bight portion and a fourth curved section extending from the end of the third curved section to a second free end. The third and fourth curved sections each having an arcuate concave surface and an arcuate convex surface.

Abstract: A pipe joint comprises a pair of tubular joint members, an annular gasket interposed between abutting end faces of the joint members, and a nut for joining the joint members. A seal projection is formed on the abutting end face of each joint member at a position radially outward of an inner periphery of the end face. When an end of the seal projection is brought into contact with an end face of the gasket by tightening the nut, a clearance is formed between an outer flat portion of the abutting end face of each joint member and the gasket end face opposed thereto. The clearance is greater than a clearance between an inner flat portion of the abutting end face of each joint member and the gasket end face opposed thereto, and is eliminated when the nut is completely tightened up.

Abstract: Disclosed is a flexible joint for sealing two conduits. One half of the joint includes an annular seal gland with an outer surface defining a static seal face. The other half of the joint includes an inner race member having inner and outer bearing surfaces, the inner surface spaced apart from and generally opposing the outer surface of the seal gland and having a region defining a dynamic seal face. An annular bellows constructed of a plurality of convolutions having varying convolution heights is disposed between the first and second seal faces to form a low leakage seal. The heights of the convolutions decrease in the direction of the first to the second seal faces.

Abstract: A gasket assembly is provided for fluid couplings. The gasket assembly includes a gasket having an outer circumferential surface including arc segments defining a minor outside diameter and a plurality of ears projecting outwardly from the arc segments to define a major outside diameter for the gasket. The gasket assembly further includes a split cylindrical sleeve having a plurality of slots disposed and dimensioned for loosely receiving the ears of the gasket. The sleeve and the gasket are dimensioned such that the ears project outwardly beyond the tube to define gripping protrusions that facilitate mounting and removal of the gasket assembly onto the coupling component.

Abstract: An improved all-metal coupler for coupling vacuum components. The coupler comprises a hollow tube terminating at each end in a flange. At least one of the flanged ends comprises a plurality of radially outwardly extending tabs or lugs for accommodating the bolt holes. In a preferred embodiment of the invention, the coupler is machined from a unitary piece of metal.

Abstract: An API groove seal is a metal ring of cross-section like a capital letter omega arranged so that the tips of its limbs provide the sole contact with the groove base before and after compression. The central or heel region may abut on the outer side wall of the groove. A family of seals for different pressure ratings has a common profile, differing only in respect of the thickness of the limbs.

Abstract: A vacuum port manifold having a plurality of ports each having a planar sealing surface comprises a unitary construction derived from an intermediate unitary structure having a compound curved surface at least in part. The planar sealing surfaces are formed by machining selected planes across the compound curved surface.

Abstract: A high pressure access fitting for a vessel, pipe or like structure includes a body of a material which is weld compatible with the vessel so the fitting may be welded to the wall of the vessel. The fitting includes an internally threaded section made of another material which is a corrosion resistant alloy and which acts to inhibit galvanic corrosion. The threaded section is an insert made of HASTELLOY.RTM., for example, and is threaded in place within the body with fine threads and with a metallic C-ring seal protecting the axial inner ends of the threads. The outer end projects beyond the body and provides a corner for a fillet weld. In addition, the fine threads of the insert/body connection are protected by a high temperature expandable sealing compound.

Abstract: A plug-type coupler consisting of male part (P) and female part (M), particularly for the connecting of conduits (2, 3) conducting fluids (4), which coupling has, within the region of the abutment place (1) between male part (P) and female part (M), a metallic ring packing (D) which is expandable in its cross section as a result of its arrangement and of a surface slot (18) by fluid (4) which is under pressure and, in this connection, rests in part on the male part (P) and in part on the female part (M), and, in order to obtain a solution which is simple in manufacture and reliable in use, the ring packing (D) which is arranged on the male part (P), with its slot (17) facing radially inward is gripped over, on the other side of the slot edge lying in the insertion direction (arrow x) by an annular shoulder (24) from which there extends a frustoconical surface (25) which tapers down towards the axis (y--y) of the plug-type coupler and opposite which there is a mating surface (27) of the female part (M) which e

Abstract: Contracting/expanding self-sealing cryogenic tube seals are disclosed which use the different properties of thermal contraction and expansion of selected dissimilar materials in accord with certain design criteria to yield self-tightening seals via sloped-surface sealing. The seals of the subject invention are reusable, simple to assemble, and adaptable to a wide variety of cryogenic applications.

Abstract: Contracting/expanding self-sealing cryogenic tube seals are disclosed which use the different properties of thermal contraction and expansion of selected dissimilar materials in accord with certain design criteria to yield self-tightening seals via sloped-surface sealing. The seals of the subject invention are reusable, simple to assemble, adaptable to a wide variety of cryogenic applications.

Abstract: Nozzle repair shields and methods for installing them are provided by this invention. The nozzle repair shield includes a cylindrical body portion having an annular flange disposed from the top end and at least one sealing lip disposed at its lower end. The body portion further includes an annular support band located in its lower end for supporting the sealing lip during insertion and use. The preferred shield is constructed from machined PTFE stock, and further includes resilient spacing members between the sealing lips to further reduce damage to the sealing lips and subsequent loss of a fluid-tight seal.

Abstract: A unitary, fully-assembled bearingless coolant union which transfers cooling fluid from a fluid source to an axial bore of a rotating spindle on a stationary machine. The union includes a main housing which holds in position both a rotor assembly and a stator assembly such that a rotating seal on the rotor assembly remains in fluid-tight contacting relation with a non-rotating seal on the stator assembly. Means are provided to allow the seal members to move axially with respect to the spindle's axis of rotation in response to axial movement by the spindle itself and to allow the inclination of the seal members from a plane transverse to this axis of rotation in response to minor misalignment of the rotor assembly from concentric relation with this axis of rotation. The two-step process for installing the union includes (1) attaching the end of the rotor assembly to a spindle, and (2) mounting the union's housing assembly upon the stationary machine within the allowable set-up tolerance.

Abstract: A connector for connecting two pipes into abutment with each other uses mateable hub members with external flanges. One of the hub members has a concentric recess with a gross tapered surface and a fine tapered surface. The gross tapered surface is inclined at a greater angle relative to the axis than the fine tapered surface. The other hub member has a protruding guide member which will contact the gross and fine tapered surfaces when the hub members are brought together. First the gross tapered surface will decrease misalignment, then the fine tapered surface will complete the alignment of the hub members. A seal is located on seal seats in the hub members. The seal is metal and is carried in a position prior to connection so as to avoid damaging contact of the other hub member when the hub members are brought together.

Abstract: A sealing system for heat exchangers of the type having a plurality of vertically positioned heat tubes extending through a heat tube sheet for exchanging heat between the interior of the plurality of heat tubes to the surrounding atmosphere, the sealing system including a first outer ring having a wall portion, terminating in an upper face, and defining an annular space between the lower end portion of the outer ring and the heat tube and tube sheet; a high nickel metal inner ring, positioned within the annular space surrounding the heat tube and resting on the tube sheet; a soft metal casing partially housing the high nickel inner ring so that when force is applied downward on the first outer ring, the annular space is reduced sufficiently to force the high nickel ring and the soft metal casing into a sealing relationship between the heat tube and the tube sheet, while allowing for vertical movement of the heat tube; the outer ring further defining a means to prevent the high nickel ring and the soft metal

Abstract: A pipe union assembly with embodiments which are capable of use over a very wide temperature range and which may be cycled through temperatures varying widely from the ambient assembly temperature and also over a wide range of pressures without the need to be retightened. Embodiments of the invention also include structures to automatically check the flow of fluids from the components of the pipe union upon disassembly of the union. The pipe union generally comprises one or more fitting members and a sealing member. The sealing member receives a ridge formed on each fitting member in a sealing fashion. One or more external sleeves hold the fitting member and the sealing member in sealing engagement. The materials from which each fitting member and sealing member are fabricated may be chosen so as to exhibit the proper hardness characteristics and thermal expansion coefficients. A compensating washer is also provided to increase compensation for thermal contractions at low temperatures.

Abstract: A gasket for a connection joint of a vehicle exhaust system to seal two sections of the system against leakage of exhaust. The gasket is an integral ring consisting of a main flange portion which is disposed between the connected sections of the exhaust system and a perpendicular radial flange which extends into the exhaust tube. The main flange includes a raised circumferential seal ridge. The radial flange includes a plurality of serrations which engage the interior of the exhaust section to retard rotation and removal of the gasket.

Abstract: A cylinder valve outlet includes a bore with a large cylindrical entry leading to a tapered seat. A nipple with a cylindrical neck is fit into the large diameter entry of the bore of the valve outlet. The nipple further includes an arcuately convex mating end for seating in the conically tapered seat of the valve outlet. A seal enhancer is between the valve outlet and the nipple. The seal enhancer is generally tubular with opposed leading and trailing ends and a cylindrical section therebetween. The leading end is tapered for engagement between the tapered seat of the valve outlet and the mating end of the nipple. The trailing end of the seal enhancer is flared outwardly. The seal enhancer is shorter than the mating portions of the nipple so that the outwardly flared trailing end is visually readily apparent. The outwardly flared trailing end also facilitates separation of the seal enhancer from either the nipple or the valve outlet when the gas cylinder is being replaced.

Abstract: A face sealing fitting includes two connectable tubular elements each having an annular end formation and a metal gasket including an outer annular section with a first axial dimension, an inner annular section concentric with the outer annular section and having a smaller axial dimension, and a tapered section having bevel faces between the inner and outer annular sections. Portions of the annular end formations which project axially the farthest beyond the tubular elements have a diameter substantially equal to the inner diameter of the inner annular gasket section and lie along the inner surface of the tubular elements to minimize dead volumes along the flowpath through the fitting.

Abstract: A fluid-tight coupling and sealing arrangement including a flexible joint for coupling a tube with pressurized fluid flowing therethrough to another tube or a fluid device. The flexible joint basically includes a first tubular member with an outer restraining member coupled thereto, a second tubular member, and a pressure-energized seal positioned between the first and second tubular members. The first tubular member has a first fluid passageway and a first annular sealing surface. The second tubular member has a second fluid passageway, a second annular sealing surface, and an outwardly facing bearing surface. The outer restraining member carries an inwardly facing bearing surface for engaging the outwardly facing bearing surface of the second tubular member.

Abstract: A pipe coupling or connection comprises a female coupling component and a mating male coupling component. Each component is matingly threaded for coupling engagement, and each is provided with an adjacent frusto-conical sealing surface. The sealing surface is provided with a controlled surface roughness, viz. very shallow fine surface variations, preferably formed as microgrooves at a pitch small relative to the pitch of the threads. The slope of the frusto-conical surface of the sealing area of the male component is slightly mismatched with that of the sealing area of the female component to simulate the bearing force vs. axial distance characteristic of shrunk-fit circular cylindrical sealing surfaces. The slight mismatch enables the sealing pressure to be above a design minimum throughout the entire sealing area yet higher at each end of the sealing area.

Abstract: Quick joint for rapid, tight-seal connection of pipes, in which from the end of the female hollow body an internal flaring with decreasing cross-section extends, suitable for getting engaged, with interference, with a corresponding external counter-flaring provided on the male hollow body in the neary of the overhanging shoulder of the latter which, on its one side, cooperates with the sleeve of the joint and, on its other side, cooperates with said end of said female hollow body; from the end of said male hollow body furthermore a second external flaring with decreasing cross-section extends, suitable for getting engaged, with interference, with a counter-flaring provided inside the interior of said female hollow body in the nearby of an internal shoulder for said male body.Also preferred embodiments are disclosed.

Abstract: A reduced resistance bead seal is integrally formed on a mounting surface of one of two matingly engageable members to form a leak-free seal between the two members despite any eccentricity or angular variances between the two members. In one embodiment, the reduced resistance bead is formed on an inner conical flange of an inverted flared end of a hollow fluid conduit. The bead presents a deformable surface as a fitting urges the flared end of the conduit into engagement with a conical seat in a receiver where eccentricity or angular variances exist between the flared end of the conduit and the conical seat. A unique method and a unique forming tool are used to form the reduced resistance bead in the flared end of the conduit simultaneously with the flaring of the end of the conduit.

Abstract: A pair of tubular joint members each have a gasket holding annular protuberance on an abutting end face thereof. The protuberance has an inner peripheral surface continuous with the inner peripheral surface of the joint member, and a sealing face adapted to intimately contact an end face of of a gasket at a position radially outward from the inner peripheral surface thereof. The sealing face is most protuberant at a position radially outward from an inner edge thereof. When the most protuberant end of the sealing face comes into contact with the gasket end face, a clearance is formed between the portion of the sealing face radially inward from the protuberant end and the radially inward portion of the gasket end face. The clearance is eliminated by the deformation of the gasket when the pipe joint is tightened up.

Abstract: A coupling comprising a female coupler and a male coupler insertable therein, the couplers having mutually engageable poppet valves for allowing fluid flow between the couplers on the mating of the couplers. A J-section annular sealing member has a dynamic sealing portion responsive to internal fluid pressure to seal against the male coupler and a static sealing portion disposed to sealingly engage the female coupler.

Abstract: A pipe coupling or connection comprises a female coupling component and a mating male coupling component. Each component is matingly threaded for coupling engagement, and each is provided with an adjacent frusto-conical sealing surface. The sealing surface is provided with a controlled surface roughness, viz. very shallow fine surface variations, preferably formed as microgrooves at a pitch small relative to the pitch of the threads. The slope of the frusto-conical surface of the sealing surface of the male component is slightly mismatched with that of the sealing surface of the female component to simulate the bearing force vs. axial distance characteristic of shrunk-fit circular cylindrical sealing surfaces. The mismatch enables the sealing pressure to be above a design minimum throughout the entire sealing area yet higher at each end of the sealing area. As the coupling is assembled, thread interference in the vicinity of the sealing surface lags the occurrence of interference between the sealing surfaces.

Abstract: A seal ring (4) and connection joint (1) for connecting and sealing conduits/pressure vessels (2, 3) and the like is disclosed. The seal ring comprises a sealing portion (5) having a pair of seal lips (6, 7) sloping radially outwardly to a web portion (8), the web portion extending radially outwardly to a spigot (9) having portions projecting transversely to the web. The thickness of the spigot in the radial direction (w) is substantially greater than the thickness of the web in the transverse direction (t), and the seal lips project transversely from the web by a distance (h) which is substantially greater than the thickness of the web in the transverse direction (t). This configuration provides improved seal characteristics. The joint (1) comprises the seal ring interposed at the interface between two conduit (or vessel) members (2, 3), the conduit or vessel members being provided with respective recesses (10, 11) arranged to receive the sealing lips and spigot of the seal ring.

Abstract: A leak-tight seal is formed by sandwiching a metal gasket between opposing annular ridges surrounding the port to be sealed. The gasket is of metal soft enough to be penetrated by the ridges and includes an annular flange disposed in grooves adjacent the ridges.

Abstract: A hose coupling for use with flexible hose comprises a biconical fitting which is inserted into a hose end and a frusto-conical locking sleeve located about the hose portion which grips the rearward conical section of the fitting. Sealing arrangements for specific embodiments of hose are disclosed. The double included angle of the conical portion of the sleeve and fitting, which engages the hose, is between one degree but less than ten degrees.