Abstract: A defouling device for mechanically disrupting fouling material for removal from a pipe or other a tubular member. The defouling device has inflatable portions capable of expanding to mechanically disrupt fouling material within a pipe. The defouling device may be attached to an inner luminal surface of the pipe or formed with the pipe. The defouling device expands circumferentially and radially to mechanically disrupt fouling material. The defouling device may also controllably expand longitudinally to mechanically disrupt fouling material and peristaltically pump fouling material through and out of the pipe.

Abstract: A radial pressure adjustable gland sealing system is disclosed herein. The system includes at least one inflatable bladder operable to surround a rotating shaft or sleeve of a rotating shaft, and at least one inflating tube. One end of each inflating tube is in fluid communication with the internal envelope of one of the at least one inflatable annular bladder. An opposite end of each inflating tube is connected, or extends, to a location outside of a static housing in which the rotating shaft is housed, such that the level of inflation of each inflatable bladder can be adjusted by way of its respective inflating tube, and thereby adjust the level of radial pressure exerted on the rotating shaft or sleeve for a rotating shaft.

Abstract: A delivery assembly for a crop input delivery system. The delivery system includes a boom adapted to be supported at a proximal end from a mobile vehicle, the mobile vehicle holding a supply of the crop input, the boom supporting a conduit having a proximal end in fluid communication with the supply of crop input. The delivery system further includes a first coupler and a second coupler. The first coupler is supported on a distal end of the boom and is coupled to the conduit. The second coupler is in fluid communication with a storage tank disposed on the implement, the second coupler configured to fluidly couple with the first coupler. A clamping assembly releasably couples the first and second couplers in fluid engagement.

Abstract: An exhaust gas treatment apparatus is provided for use together with a diesel engine in an indoor environment, where the diesel engine is part of, e.g., a vehicle or other machinery. A method of controlling such an exhaust gas treatment apparatus is also provided.

Abstract: A plug-type sleeve for fastening on an object which is, in particular, in the form of a rod, cable or pipe, and which includes an end which has an opening for receiving a section of the object and has a circumferential groove with annular seal which is composed of an elastomeric material arranged in it, it being possible for the plug-type sleeve to be placed against an outer surface of said section. The plug-type sleeve includes a substantially sleeve-like clamping element, which can be coupled to the annular seal in the longitudinal direction of the plug-type sleeve, for axial compression and resulting radial constriction of the annular seal, wherein the clamping element is formed and designed such that external application of a fluid pressure medium causes axial extension of the clamping element.

Abstract: A rotary lock block type drilling riser connector has a main body connection part and control pipeline connection parts. A driving ring is set between flanges, a plurality of fan-shaped grooves are set on the lower end of the flange of the upper joint, each fan-shaped groove having a lock block therein; each lock block is slidably connected with a T-shaped elongated slot of the upper joint; the driving ring is fixedly connected with the flange upwardly, many segments of the horizontal T-shaped slots are evenly distributed in the inner surface of the driving ring, another screw hole is provided in the outer circumferential surface of the lock block, and the driving ring is slidably connected with the lock block in the circumferential direction.

Abstract: A pipe coupling has an outer shell with a flexible inner liner therein. The liner is secured to the shell by a clamping arrangement, which uses inner rings at the ends of the shell. The inner rings are hydraulically expanded out to the shell to form a seal between the shell and the liner. In use, compressed fluid is provided to a cavity between the liner and the shell to force the liner to seal against a pipe joint.

Abstract: A recreational vehicle waste hose coupling assembly includes a coupler including a sleeve that has a first end wall, a second end wall, an inner wall and an outer wall. An inflation space is defined between the inner and outer walls. A tube has a receiving end and an insertion end and the tube is fixedly positioned within the sleeve. An air pump is fluidly coupled to an air line. The air pump is actuated to inflate the sleeve to frictionally engage the outer wall with an inner surface of a sewer pipe. A feed pipe has an inflow end, an outflow end and a bend between the inflow and outflow ends. The inflow end is removably positionable within a recreational vehicle waste hose. The outflow end is removably positionable within the receiving end.

Abstract: The invention relates to the production of a connector intended for a pipe, including an end piece which is mounted to the end of a pipe. The connector includes a sleeve covering said pipe end in order to crimp same onto the mounting end. According to the invention, the sleeve includes an annular chamber, while the armoring wires have free ends which are folded back against the outer polymer sheath, said sealed annular chamber surrounding the aforementioned pipe end. The annular chamber is then dilated with the injection of a fluid in order to maintain the free ends engaged between the outer polymer sheath and the sleeve.

Abstract: A threaded joint comprises a pin coupled to a box with an annular groove, one or a pair of seal rings, and hydraulic actuating means to pressurize the seal ring or rings against the pin to provide sealability of the joint. The seal ring or rings comprise a frustoconical surface, an external surface, and an internal surface with one or more protruding annular ribs. In the unpressurized state, the seal ring or rings do not protrude from the groove. In the pressurized state, the frustoconical surface of the sealing ring is in sealing contact with an internal surface of the annular groove of the box, and the annular ribs of the sealing ring are in sealing contact with the external surface of the pin.

Abstract: A pipe shunt device for allowing sewage to bypass a trough in a manhole and travel from an inlet port to an outlet port comprising a hose, a first plug component having a first plug removably attachable to the first end of the hose via a first attachment clamp; a second plug component having a second plug removably attachable to the second end of the hose via a second attachment clamp; wherein a valve lever is disposed in the first plug component that allows or prevents sewage from flowing from the inlet port to the outlet port.

Abstract: Device for a hose structure (11) with an inner main hose (12) and an outer cover hose (13) which delimits a pipe-shaped air filled space (14) intended to give the hose uplift in water. At one end there is a coupling element (15) which forms a fastening for the main hose and cover hose and which at its free end is connected to or integrated with a coupling part (16) for connection of the hose structure (11) to an outer connection. The coupling element (15) comprises an inner sleeve in which the end (18) of the main hose (12) is inserted into and fixed to. An internal sleeve (22) is associated with the coupling part (16), as the inner sleeve (17) has outside threads (20). It comprises an outer sleeve (24) with the end of the cover hose clamped to it and with inside threads for screwing onto the inner sleeve (17).

Abstract: For sealing an annular space (4) between opening (2) in a wall or similar, member (1) and an object (3), extending through the opening (2), by introducing a sealing agent into the space (4), at least one bag (9, 10), into which the sealing agent is introduced, is positioned in the space (4). For this purpose, a supporting element (5, 6) is used, which can be positioned in the opening and to which a bag (9, 10) is fastened. The annular space (4) can be sealed easily and also liquid-tight in this manner.

Abstract: An assembly and method of joining a pipe with a catch basin, the catch basin having an apertured side wall, the assembly and method including providing an elastomeric ring having an annular hollow expansion space, a foam injection port, a flow checking inflation valve for resesting fluid back flow within the foam injection port, and having a slide stop extending outwardly from the elastomeric ring; inserting the elastomeric ring into the catch basin's aperture; inserting an end of the pipe through the elastomeric ring; and injecting a closed cell resilient foam through the fluid injection port for expansion within the expansion space, the expansion driving the ring's annular inner and outer surfaces inwardly and outwardly, forming a seal spanning between the pipe and the catch basin.

Abstract: For sealing an annular space or space (4) between an opening (2), in a wall or similar member (1), and an object (3) extending through the opening (2), at least one sealing element (6) is placed in the annular space (4). Initially, the sealing element (6) is placed in the compressed state between the wall (1) and the object (3) and subsequently is released from the compressed state to an expanded state. For this purpose at first, the sealing element (6) is compressed by a sheath (7) which, after the sealing element (6) is positioned in the annular space (4), is destroyed and makes the expansion of the sealing element (6) possible.

Abstract: The invention relates to a sealing element (1) with inflatable bellows (10) for sealing piping. Said sealing element can be e.g. cylindrical in shape and said bellows (10) can be provided with two recesses (14a, 14b) containing a gel (11). When the bellows are inflated, the gel (11) encompasses e.g. uneven areas on the inner wall of the piper or cables in the pipe in such a way as to provide a seal.

Abstract: The invention concerns a device adapted to be fixed and sealed to at least one cylindrical member (1, 1'), characterized in that it includes:a first sleeve (2),a second sleeve (3) coaxial with the first sleeve (2) having a greater capacity for deformation than the first sleeve (2) and fixed and sealed to the first sleeve (2) at both ends,at least two cylindrical rings (4, 5) coaxial with the second sleeve (3), pressed against the latter and each fixed by one edge to one end of the second sleeve (3), andmeans (6, 6') for injecting a pressurized fluid between the first sleeve (2) and the second sleeve (3).

Abstract: A valve apparatus comprises two housings which can be alternatively connected to one another and separated from one another and possesses an orifice. Each housing holds a flap which is pivotable about an axis of rotation and has a disc and a pivot. The flap can be swivelled into a closed position in which it closes the orifice of the relevant housing at the flat mouth surface of the orifice. Each axis of rotation passes through the mouth area of the relevant housing at an acute angle. Each pivot is pivotably mounted in a hole of the relevant housing, which hole completely surrounds said pivot in cross-section, and is sealed from the housing. This gives a stable support and good sealing of the pivots and, in combination with the discs adjacent to one another when the housings are connected together, makes it possible to avoid contamination of the environment by the transferred material and contamination of the latter by materials present in the vicinity of the housing.

Abstract: A clamp system and method used to remotely connect or disconnect a submerged pipeline from another submerged pipeline or from a riser line or the like. When used with a riser line, the riser line end of the connector carries calipers that pivot open to receive or release the pipeline connection end. The mating connector end sections are radially enlarged and are provided with annular grooves that are in register when the sections are abutted to house an annular, hollow metal seal ring. With the calipers closed and securing the two connection end sections, a locking collar is moved over the free end of the calipers, and the seal ring is energized by applying high pressure fluid into the seal ring, causing the ring to expand and seal the mating connector ends, restrict lateral movement between the ends, and stress the connection to maintain the clamp.

Abstract: An apparatus of the present invention is an apparatus for housing a splice reinforcing portion of optical fiber, which comprises (a) a first holding member for holding a splice reinforcing portion for reinforcing a splice between a first optical fiber and a second optical fiber optically connected to the first optical fiber and constituting a light transmission line together with the first optical fiber, and (b) a first photosensor disposed on a side surface of the splice reinforcing portion, receiving leaking light from the splice reinforcing portion, and fixed to the first holding member.

Abstract: Method for increasing the distance between two faces, inserting into a space between the two faces a diaphragm power jack, the shape of which being adapted to the shape of the space, the diaphragm power jack comprising two abutting sheets being sealingly bonded along the entire circumference, a pipe penetrating the bonded, injecting a pressurized fluid through the pipe to the interface between the two sheets thereby forcing the sheets apart whereby substantially all the energy from the pressurized fluid being converted to forces perpendicularly to the sheets.

Abstract: A novel gas passage shifting device used primarily for a surface area measuring apparatus for particulate materials is disclosed. The device is characterized by having a base member provided with a recess which receives a tubular body so as to gas-tightly connect it to the gas passage by a simple operation.

Abstract: This invention preferably relates to an externally applied coupling system providing thrust restraint for a pair of axially aligned tubular members. The coupling system comprises a hydraulically/pneumatically inflatable, elastomeric sealing gasket adapted to encircle and apply pressure to the wall of the tubular members, where the sealing gasket includes means for inflating same, and a support member. The support member is defined by a pair of curved legs joined by a web portion along one end of each curved leg to reveal a U-shaped channel member. The free end of each curved leg cooperates with one of the tubular members to provide thrust restraint thereto, and further, the support member is adapted to overlie the sealing gasket so as to confine the compressive pressure from the sealing gasket against predefined annular portions of the tubular members.

Abstract: A quick-acting pipe connector assembly used to join two pipes. The assembly includes a flange connected to the first pipe. The flange has an end face and a plurality of openings around the periphery of the end face. An end fitting is connected to the second pipe. The end fitting has an end face sized to fit against the flange end face. A force ring is attached to the end fitting and has a plurality of openings around its periphery. A plurality of connector bolts are attached to and extend through force ring openings. Each of the connector bolts extend through one of the flange openings. A lock ring is rotatably attached to the flange. The flange is positioned between the lock ring and the force ring. The lock ring rotates relative to the connector bolts to lock the connector bolts to the flange. A force actuator is disposed in the force ring.

Abstract: A connecting element including an annular sleeve that has a self-supporting inner wall and a flexible outer wall, and a space between the inner and outer walls for introducing a preferably hardenable free-flowing filling medium into the connecting element to expand the connecting element radially outwardly to contact surfaces of adjacent pipe structures. A feed opening is provided in one of the inner wall and the outer wall to provide access to the space between the walls to permit introduction of the filler material. The connecting element is particularly suitable for sealing the joint between a multi-walled main pipe and a branch pipe extending from the main pipe.

Abstract: A temporary sealing device for sealing a waste discharge conduit from an RV to an inlet receptacle of a waste receiving reservoir. The sealing device includes an inflatable bladder which is mounted so as to be positionable between the discharge conduit and the receptacle. A pump inflates the bladder to a size which seals the opening between the receptacle and the conduit to inhibit removal of the conduit and prevent the discharge of waste therearound. The sealing device is also provided with a valve which allows the bladder to be deflated after the transfer of waste and permits the conduit to be withdrawn from the receptacle.

Abstract: A sealing device of this invention is designed to prevent entering of the open air through a coupling of a process tube of a CVD apparatus. The sealing device includes a first flange having a mirror-finished face, a second flange having a face which is brought into contact with the face of the first flange, at least one gas guide which is open to at least one of the faces of the first and second flanges and an evacuation system for evacuating a region, in which the first and second flanges are brought into contact with each other, through the gas guide.

Abstract: An airtight, flexible joint is disclosed for the interfacing of two pressure vessels such as between the Space Station docking tunnel and the Space Shuttle Orbiter's bulkhead adapter. The joint provides for flexibility while still retaining a structural link between the two vessels required due to the loading created by the internal/external pressure differential. The joint design provides for limiting the axial load carried across the joint to a specific value, a function required in the Orbiter/Station tunnel interface. The flex joint comprises a floating structural segment which is permanently attached to one of the pressure vessels through the use of an inflatable seal. The geometric configuration of the joint causes the tension between the vessels created by the internal gas pressure to compress the inflatable seal.

Abstract: A double-walled article in the form of a tube having a small volume filling of a friction-reducing liquid or solid between its two walls. The article is able to revolve over a substrate by relative sliding motion between its two walls, to provide environmental or electrical protection.

Abstract: A system for maintaining a tightness between two parts rotatable relative to each other. The system includes at least two sealing units, with each of the sealing units having at least two possible states or conditions, namely, a first state or condition for ensuring a tightness between the two parts and a second state or condition wherein it does not ensure a tightness. Each sealing unit is deformable and includes a drive arrangement for intermittently actuating each of the sealing units.

Abstract: This invention provides an all metal seal for vacuum or pressure vessels or systems. This invention does not use gaskets. The invention uses a flange which fits into a matching groove. Fluid pressure is applied in a chamber in the flange causing at least one of the flange walls to radially press against a side of the groove creating the seal between the flange wall and the groove side.

Abstract: A quick disconnect coupling that is used to interconnect a dispensing hose from a reactor tank to any one of a plurality of charge tanks to facilitate the transfer of ingredients from the charge tanks to the reactor tank. Each charge tank has an outlet pipe with an annular flange thereon that supports a larger concentric rigid tube which projects outwardly beyond the outlet pipe. The dispensing hose has a rigid pipe connected thereto which is adapted to be received by the rigid tube and into abutting contact with the outlet pipe. An inflatable annular tube is secured to the rigid tube and encompasses the outlet pipe and the rigid pipe upon reception of the rigid pipe by the rigid tube so that upon inflation of the inflatable annular tube the coupling interconnects and seals the outlet pipe, the rigid tube and the rigid pipe.

Abstract: A zero-leak cryogenic coupling includes a polymeric seal clamped to a male bayonet member with two pairs of tightening rings. The tightening rings threadably engage each other in respective pairs around tapered ends of the inflatable seal member so that a wedging action tightens the seal member about the male bayonet. Once in place, the seal may be inflated via an inflation port so that its expansion provides a pressure contact with the inside surface of a coaxial female member.

Abstract: A mold assembly for manufacturing composite plastic products includes a mold cavity part and a lid, which is joined to form a cavity for foam precursors. The precursors expand in the cavity in a known manner to fill the cavity with a suitable layer of foamed material, such as foamed urethane. The mold cavity supports an exterior shell and the lid supports an insert for reinforcing a finished composite product. A sleeve is integrally formed on the preformed shell and it in turn is located within an access port formed through wall of the cavity part to define a slideway for receipt of a pour head extension. The extension is selectively clamped and unclamped with respect to the shell sleeve by an inflatable seal clamp which is formed as an annular ring with a pressurizable passage connected to a source of selectively applied pressure.

Abstract: For use with a pipe having an outer surface, a clamping structure is set forth. In the preferred and illustrated embodiment, the device utilizes a surrounding ring of solid construction having a central passage fitting over the pipe in question. An internal groove is formed in the ring. An encircling clamp means is placed in the groove which has an exposed or outer face confronting the pipe. The clamp means is fabricated with the outer face supported on a pair of spaced sidewalls which are corrugated along their length. On application of pressure to the interior of the ring, the corrugations are straightened, driving the outer face into the pipe and thereby clamping.

Abstract: A telescopic joint for repairing underwater pipelines laid at a great depth in which an annular sheath of steel having a yield point of not more than one half that of an outer sleeve of the joint is welded onto an inner cylinder, to create with the inner cylinder an annular chamber or interspace, the cylinder-sheath-sleeve assembly being guided in its telescopic movement by an inner tube welded coaxially to an end of the outer sleeve. The interspace is connected to an oil pump which under adequate pressure can cause the steel sheath to expand, to the extent that it yields, to interlock with the outer sleeve.

Abstract: An apparatus insertable into a ship deck drain for draining water from such drain includes a conduit having an outlet end and threaded inlet end, substantially tubular inflatable sleeve surrounding a portion of the conduit insertable into the drain, and a pair of collars for supporting opposite ends of the sleeve. One of the collars is threaded onto the threaded end portion of the conduit, while the other collar is attached to an intermediate portion of the sleeve portion. In various embodiments of the apparatus the sleeve takes different forms. In one embodiment, the sleeve is an enclosed, double-walled tubular bladder. The sleeve is inflated for radial expansion via a valve and valve stem in fluid communication with an airtight chamber formed by the sleeve. In one embodiment, the valve stem extends axially within the bore of the conduit, exiting the outlet end of the conduit and terminating at the valve.

Abstract: A dust-tight hatch closure assembly for filling railway covered hopper cars having a filling means and a pneumatic seal in the form of an inflatable annulus.

Abstract: An apparatus for patching leaks in pipes, hoses, containers and the like has a rectangularly shaped inflatable pad comprising top and bottom layers with the top layer constructed of inelastic material and the bottom layer of very elastic material connected together. The pad has mutually opposite side strips and mutually opposing frontal and rear strips. Straps are provided for attachment to the side strips for securing the pad about a leak in a pipe, or the like. The pad is provided with a valve and member for inflating the pad.

Abstract: A sealing element adapted to be disposed in a slitshaped, preferably annular gap, comprises an internal gas-filled cavity with an inlet in one end and an outlet in the other end for a hardening filling medium adapted to be introduced into the cavity under pressure so that the cavity is filled and the element is expanded so that the gap is sealed. The outlet (15) is connected to a closed chamber (14) adapted to receive the gas which is driven out of the cavity (2) in the flexible element when the cavity is filled with filling medium (16), so that the displaced gas can be compressed in the closed chamber (14') and exert a counter pressure on the filling medium (16') in the sealing element while the filling medium is hardening.

Abstract: A universal tail pipe connector includes a three-way valve disposed on a hollow, cylindrical housing having inlet and outlet ports in spaced registration along the longitudinal axis of the housing, each having an internal diameter at least as large as the largest outside diameter tail pipe to which connection is required, the connector further including an annular, inflatable seal of elastomeric material disposed in an annular collar portion of the housing adjacent the inlet port, the seal being responsive to positive pressure and vacuum pressure signals provided through the three-way valve from external sources of each in dependence on selectable operation by an operator, for retracting inside the annular collar in response to the vacuum pressure signals to permit unobstructed penetration of the tail pipe through the inlet port into the housing, and for inflating in response to the positive pressure signals to provide a surface seal along the contour of the outside diameter of the enclosed tail pipe.

Abstract: A high wall mining system including a continuous mining machine, a remote control station outwardly of the high wall from which extend electric cables wound on cable reels which extend to the continuous mining machine enabling the operator to control the machine based upon television pictures transmitted to the control station from television cameras on the machine and the signals from laser and sonar guidance systems provided at the control station in cooperation with elements on the continuous mining machine and an extensible and retractable vacuum air conveyor system for the coal recovered by the mining machine.

Abstract: The preferred and illustrated embodiment is a connector adapted to be joined above a blowout preventer and below the rotary table of a drilling rig. It collects the annular flow of returned drilling mud and directs mud to an incorporated, radially directed connective nipple. It enables the blowout preventer to be adjusted in location relative to the drilling rig and further accommodates a variable level of drilling mud in the annular space. The radial nipple connects with a mud line extending at some radial direction with a slope causing the mud to flow by gravity from the annular space to remote located mud tanks.

Abstract: A quick connect-disconnect attachment for faucets for delivery of liquid therefrom through an extension hose. The attachment is retained by pneumatic pressure created by a hand-operated bulb. A valve permits release of the pressure therein for removal of the attachment.

Abstract: A method of joining pipes in which a sleeve is placed over the adjacent ends of the pipes so as to overlap each pipe. The sleeve fits with clearance around the pipe ends. The ends of the clearance space are closed by inflating hollow sealing rings and then epoxy resin is injected into the clearance space to fill the space. The pressure of the epoxy resin composition is then raised to a pressure substantially greater than atmospheric and the pressure is maintained until the resin composition is set.

Abstract: The present invention discloses method and apparatus for connecting together two members having mating surfaces by means of a plurality of fasteners such that equal compression forces are exerted on the members along force lines normal to a common plane. To accomplish the foregoing objectives, a plurality of pins are carried by one member and pass through bores in the opposite member. The pins are longitudinally extended simultaneously with a common internal extending force and stops are affixed to the ends extending through the second member snugly against the surface thereof. Upon release of the common extending force, all the pins attempt to restore to their original positions with equal restorative forces being equal and opposite to the common extending force applied thereto.

Abstract: Coupling means for an installation for refrigerating containers and intended to provide a seal for a flow of cold air between a refrigeration system and containers to be refrigerated comprises a double sleeve 22, 24 which forms an annular space housing an inflatable envelope 30. A movable portion 60 is displaceable axially by the envelope 30, while still being guided by the sleeves, so as to be applied by way of a sealing joint 38 against the wall 14 of the container, around an opening 16 in the wall thereof.

Abstract: A connector for connecting lengths of metal tubing such as used for air-conditioning or central heating ducts, comprises a cylindrical end part for insertion into an open end of the tubing. In order to provide a seal between the connector and the tubing the connector has a recess containing a hollow, flexible sealing ring into which fluid can be injected to expand the ring. In order to ensure an adequate seal both before and after expansion of the sealing ring the latter has outwardly projecting sealing flanges which, before expansion of the sealing ring, make a seal due to their own inherent resilience and/or the resilience of the sealing ring, and, after expansion of the sealing ring, form a seal under compression. In one embodiment of the connector a sealing flange is adapted to fold over and lie between the respective faces of the connector and the tubing to prevent metal to metal contact between them.

Abstract: For use in heat-insulated pipe-lines produced from at least two heat-insulated pipe units joined end to end, each heat-insulated pipe unit consisting of a pipe surrounded over the greater part of its length by at least one layer of heat-insulating foam material which is in turn enclosed by an outer jacket of fluid-impervious protective material, the end parts of the pipe projecting beyond the corresponding ends of the layer or layers of heat-insulating material and the end parts of the jacket projecting likewise but for a shorter distance, so that annular recesses are formed in the ends of the pipe unit. The pipes of these two pipe units are interconnected end to end by a butt weld or mechanical jointing element between the projecting end parts thereof. Annular seals of rubber-like material are located in the annular recesses in the proximate ends of the two pipe units.

Abstract: A pipe coupling comprising a sleeve which is fitted over the adjacent ends of the pipe sections. The sleeve has sealing means for sealing the sleeve against the pipe and gripping means for gripping the pipe. The sealing means comprises an annular groove which accommodates an annular tire the interior of which communicates with the exterior of the sleeve through a bore in the wall of the sleeve. The gripping means comprises arcuate groove sections on the inside of the sleeve which accommodates a tubular member or members which communicate with the exterior through bores in the wall of the sleeve, and jaw sectors with teeth which bite into the outside of the pipe. The tubular member or members and the annular tire are filled with a hardenable composition and maintained under pressure until set to force the sealing member into sealing contact against the outer surface of the pipe and cause the gripping teeth to bite into the outer surface of the pipe.