Abstract: A fastener structure for fastening together a plurality of members, such as the plurality of members comprising a tube plug, and a method for plugging an opening in a solid member, which may be a tube, for preventing the flow of fluid through the opening in a solid member or through the tube, such as a nuclear steam generator tube, comprises a first member, such as a shell, a second member, such as bolt structure, and locking structure. A deformable tab portion of the locking structure may have an undercut positioned so that when the second member is installed within the first member, a first surface of the undercut is bent toward a second surface of the undercut thereby plastically deforming the tab portion into a recess in at least one of the first and the second members for automatically securing together the plurality of members.

Abstract: An apparatus for repairing a pipe, comprising an adjustable strap to surround the pipe, and a rubberoid seal attached to a reinforcing plate having a slotted back so the plate and seal may rotate around the pipe while attached to the strap. The length of the strap can be adjusted by turning a screw on a coupling attached to end of the strap. The seal can be attached to the reinforcing plate with adhesive or double-sided tape.

Abstract: A hose (1) includes a main pressure cord layer (5) for holding a fluid, and an auxiliary pressure cord layer (7) formed so as to sheathe the main pressure cord layer (5) and to form a buffering space (9) for retaining the fluid leaking through the main pressure cord layer (5) between the main pressure cord layer (5) and the auxiliary pressure cord layer (7). The auxiliary cord layer (7) includes first and second cord plies in an asymmetrical structural relation capable of being twisted by the pressure of the fluid leaking through the main pressure cord layer (5). Thus, even if its main pressure cord layer and its rubber tube are damaged leakage of the fluid can be prevented.

Abstract: A pipe-end protector depending on its being used as a cap or plug comprises a metal housing with a sleeve-like, elastomer inset or a metal plug with a sleeve-like, elastomer cover. To increase the strength of the protector, the metal housing or the metal plug--which always are tubular--are provided at their outer end with a flanged or folded, preferably rolled edge. To facilitate manufacture of the protector, the inset or the cover may consist of at least two part-cylindrical mating case-components.

Abstract: A pumpable cement grout and method for use thereof for grouting annular cavities. The pumpable cement grout is a mixture of a hydraulic cement, water in an amount sufficient so that the water-to-cement ratio of the grout is from about 0.60 to about 1.00 by weight, and pregenerated aqueous foam in an amount sufficient to adjust the wet density of the grout to a value of from about 48 to about 72 pounds per cubic foot. The grout is pumped into an annular cavity formed intermediate a tubular external member and an internal member disposed in the tubular external member, so that the grout fills this cavity by flowing in a generally longitudinal direction therethrough. The tubular external member may be a concrete sewer pipe, and the internal member may be a plastic liner pipe. The pressure at which the grout is injected into the annular cavity is maintained at or below a predetermined maximum pressure, so as to avoid collapsing the plastic liner pipe.

Abstract: A liquid outflow control unit used in an instrument for injecting a liquid such as a liquid medicine into a human body. It includes a plurality of separate partial members, at least one of which has a groove on a joined face thereof to form a small path through which a liquid passes. A liquid enters one end of the groove and goes out of an exit which fluid communicates with the other end of the groove. The liquid flowing out of the exit is injected into the human body via a connection tube and a needle.

Abstract: A bar-like molding made of fiber-reinforced plastic materials of the type which can be extended by connecting pieces thereof, comprises a fiber-reinforced plastic covering layer formed by laminating a plurality of fiber-reinforced plastic layers and short length metal pipes for connection arranged at the ends of the fiber-reinforced plastic covering layer, the fiber-reinforced plastic covering layer including an inner fiber-reinforced plastic covering layer composed of a plurality of fiber-reinforced plastic layers and abutting at its ends against the respective inner end surfaces of the short length metal pipes for connection, and an outer fiber-reinforced plastic covering layer composed of a plurality of fiber-reinforced plastic layers and formed in such a manner as to cover the outer peripheries of said inner fiber-reinforced plastic covering layer and the short length metal pipes for connection, the reinforcing fibers of at least one of the plurality of fiber-reinforced plastic layers of at least one of t

Abstract: A cable-guide assembly of particular utility in ground subsidence regions consists of three tubes extruded simultaneously with the connecting webs and abutting at hexagonal segments form with two angularly adjoining surfaces. A subsequently applied sealing strip or a sealing strip formed on one of the tubes not interconnected by a connecting web can bridge between the two tubes which are not interconnected by such webs when the bundle is formed.

Abstract: Downstream extending convolutions (52) disposed on the inside corner (72) of an angled conduit (50) eliminate or reduce the two-dimensional boundary layer separation region (44) thereby eliminating or reducing the pressure losses associated with the separation region (44). The convolutions (52) may be formed into either the angled conduit wall or in an insert (200) which is positioned on the inside corner surface of the conduit.

Abstract: A device for stopping leaks in the sidewall of a container such as a 50-55 gallon drum comprising a band of flexible but non-elastic plastic material for manually wrapping around the drum so that a central portion of the band is centered over the leak. An integral inflatable bladder on the inner surface of the central portion is inflatable by a CO.sub.2 cartridge carried on the outer surface of the central portion. A lanyard runs from a CO.sub.2 release valve to one end of the band so that an installer can stand behind the drum while pulling the lanyard to inflate the bladder.

Abstract: A pipe block for reversibly blocking the bore of a pipe comprises a body 2 having a shaft 3,4, a plurality, in this case three, spaced apart annular flanges 5 extending from the shaft to form a close fit with the internal wall 31 of the pipe 30 and structure in the form of a funnel 8 attached to the shaft for guiding the threaded end 23 of a rod 20 into an internally threaded bore 6 of the shaft.

Abstract: An early warning system for a material transfer system having an elongated area to be monitored for internal wear caused by erosive flow action of a transfer material. A material transfer conduit has an inner surface forming a flow passageway for the transfer material and an outer wall surface with a wear detection indicator normally visible in situ at an elongate section of the outer wall and being subject to obliteration upon wear-through of an underlying portion. A translucent or transparent outer containment layer surrounds the outer wall surface of the transfer conduit The wear indicator is colored to contrast with the transfer material and indicates wear by an eroded area which can be visually observed through the outer translucent layer.

Abstract: A variable-geometry duct having at least one moveable side wall, and a bellows interposed between the side wall and a back-up structure. The bellows creates a sealed cavity between the moveable side wall of the duct and the back-up structure. Pressurized fluid in the cavity is controlled so as to maintain a desired pressure differential between it and the pressure of the fluid carried by the conduit for all positions of the moveable side wall.

Abstract: Improved equipment for supporting a length of flexible drainage hose or piping to extend along a substantially uniform gradient that includes the combination of an open ended flexible tubular element or sleeve for receiving and supporting therein the intermediate segment of a selected drainage hose or piping, with a length of cord or line aligned with and carrying the flexible tubular element or sleeve depending therefrom and therealong. The respective ends of the cord or line extend beyond the respective open ends of the tubular element or sleeve for securing the cord or line in sufficiently taut relation and in an orientation to establish a substantially uniform gradient for the supported length of flexible drainage hose or piping.

Abstract: A tube closure of elastomeric material having specific properties has an open end, a closed end and a side wall defining a tapering outer frustoconical surface. The side wall has a predetermined thickness at its thinnest point, which is determined in connection with the angle of taper of the outer frustoconical surface and the properties of the elastomeric material to provide a seal with high integrity over a range of tube sizes. The closure has a radially extending flange of predetermined thickness by which the closure can be removed from a tube by a pushing force. The closure has an inner surface for sealing against an outer surface of other tubes.

Abstract: A temporary reusable storm drainage conduit plug sized to slidably fit into the end opening of a length of tubular conduit situated within the ground. The device in use prevents dirt and debris from entering the open end of conduit already in place during storm drainage construction and is easily manually removable when the construction is ready to proceed further.

Abstract: A tool for use in the repair of fluid conduits or pipes prevents fluid flow along the interior surface of the pipe, while allowing flow through a central bypass tube. The tube also serves to support an expandable plug which is axially compressed by a concentric compression tube surrounding the bypass tube. As the compression tube axially compresses the plug, the plug is forced to expand radially due to the flexible nature of the center section wall and the air entrapped therein. As no great amount of pressure is trapped behind the plug due to the communication of the pipe with the outside environment through the bypass tube, relatively low forces may be used in the actuation of the tool. Moreover, the thin wall or membrane of the center section of the plug permits a relatively wide range of expansion, allowing a single plug to be used in a wide variety of pipe sizes. The tool is particularly suited to use with copper water pipes, but is adaptable to virtually any type of fluid conduit or pipe.

Abstract: Cold impact-resistant tubing especially useful as a fuel line for motor vehicles which is stable in length, has a brief thermal overload capacity, and consists of at least three layers of at least two different mutually compatible polyamides. The tubing also preferably has an internal and an external layer of impact resistance-modified polyamide, with or without a plasticizer, and a barrier between the layers of impact resistance modifier-free homopolyamide, copolyamide or blends thereof.

Abstract: An economical to manufacture and simple to install and remove gas charged fluid pressure accumulator including a cup-shaped accumulator body with an integral dome at one end and an integral in-turned annular lip at the other end, a piston slidably disposed in the accumulator body, and an external screw thread on the accumulator body. The accumulator body is screwed into a threaded counterbore until the annular lip bears against a bottom wall of the counterbore with a fluid port of the manifold inside of the projection of the lip on the bottom wall. A seal ring in a groove in the bottom wall of the counterbore bears against the annular lip to seal the chamber of the accumulator defined between the bottom wall and the piston.

Abstract: A multi-layered tubular synthetic sausage casing which includes an outer polyamide layer, an inner polyolefin layer and an intermediate layer for mutually bonding the inner and outer layers. The inner polyolefin layer includes a copolymer comprised of units of ethylene, propylene or straight-chain alpha-olefins having 4 to 8 carbon atoms, or of a mixture of these copolymers. In a preferred embodiment, the polyolefin layer is comprised of an ethylene/propylene/butylene terpolymer and/or of a propylene/butylene copolymer.