Abstract: An improved blind rivet assembly is disclosed, in which a plastics cylinder is moulded along a pulling stem of a long break mandrel. On setting the mandrel is broken within the cylinder providing the cylinder with an additional degree of shear strength, allowing the cylinder to be used as a support.

Abstract: The invention is directed to a rivet nail which can include two separate pieces or one single piece. Each rivet nail has a hollow rivet part having a head (1) and a cylindrical stem (2) axially connected to the head. The end located opposite to the end carrying the head (1) has a hollow cylindrical space extending inside the cylindrical stem (2) over at least a part of the cylindrical stem (2) length, and a nail part including a hollow cylindrical stem extending taperwise to form a nib (4).

Abstract: An expandable fastener device for attaching tissue to bone and a surgical operating technique for using it. The fastener device includes a shaft which will pierce tissue and when rotated, will drill a hole in bone with a drill point to receive the fastener in bone. The device can be drilled in place and fixed in place by actuation of the device itself. The anchor porion of the fastener device remaining in the body when the shaft is sheared and removed, is made from a a bioabsorbable polymer material and an implantable grade titanium material or alloy thereof. The portion of the fastener that captures the body soft tissue (tendon or ligaments) is biodegradable and the portion anchored to the bone is the titanium material. Another embodiment constructs the component that captures the body soft tissue into a pedal-like integral disk where each pedal flexes to conform to the shape of the bone surface adjacent thereto.

Abstract: An improved mounting structure includes a soft mounting sleeve having a locking hole at a central position for fitting into a through hole of a mount, and a screw fitted with a washer. In assembly, the screw is inserted into the mounting sleeve fitted into the mount before driven into a frame structure. When the screw is driven into the top side of the mount, the bottom side of the mounting sleeve will elevate with the turning of the screw to impose a pressure on the screw threads, thus preventing the screw from being driven further and achieving a good mounting effect. This arrangement also prevents the screw from driving unduly deep into the frame structure due to excessive torsional force to prevent any possible damage to the frame structure or the screw threads.

Abstract: A fastening device for fastening a first element to a second element, for example for mounting a component of a motor vehicle screen wiping apparatus on a panel of the bodywork of the vehicle, is of the general kind comprising a bolt and nut assembly, with the shank of the bolt passing through a hole in the panel. A shock absorbing bush, e.g. of rubber, is interposed between the bolt and nut assembly and the hole. When the device is tightened, this bush is compressed axially between an annular and radial thrust surface carried by the bolt and the annular gripping face of the nut. A gripping spacer element is disposed axially between the radial thrust surface and the annular gripping face of the nut.

Abstract: A non-blind rivet is disclosed that can be used to form a joint without the need for brazing, welding or threaded locknuts. The rivet 1 is placed in compression by opposing dies 15,20 causing a narrow region of the rivet wall to buckle forming a fold 24, the rivet thus being held to a workpiece 12 between a flange 6 and the fold 24.

Abstract: A blind rivet comprises a rivet body with an axial through bore, a head at one end and inwardly extending lugs at the tail which are provided with recesses. The rivet may be set by a tool having lugs adapted to engage in the recesses, and may be used as a drainage passage or as part of a releasable fastener.

Abstract: The invention is a device for replacing the seat for an oil plug frequently found as part of an oil pan of an internal combustion engine to allow draining and includes a hollow cylinder having a shoulder for insertion through the existing seat to extent into the oil pan, an installation bolt is employed for compressing and expending the hollow cylinder outward to fixedly secure the hollow cylinder to the existing seat between the shoulder and expended cylinder and the cylinder being internally threaded adjacent the shoulder to accept a plug.

Abstract: In general a torque controlled blind bolt for securing workpieces is shown and which blind bolt has a core pin with a blind side head and a plurality of threads and a nut adapted to be threaded onto the pin threads; the blind bolt which has a main sleeve structure and an expandable blind side sleeve structure is set by torque applied between the pin and nut which causes the expandable sleeve to be expanded by the pin head and to thereby form a load bearing blind head; the blind fastener includes a grip adjuster structure which defines a cavity having a depth selected to define the grip range of the fastener with the grip cavity generally located externally of the workpieces; an anti-rotation structure is formed between the pin head and the expandable sleeve structure to inhibit relative rotation in response to the torque applied between the nut and the pin.

Abstract: In general a blind fastener for securing workpieces is shown and which blind bolt has a core pin with a blind side head and a plurality of threads or locking grooves and a nut adapted to be threaded onto the pin threads; the blind bolt which has a main sleeve structure and an expandable blind side sleeve structure is set by a relative axial force applied to the pin which forces the expandable sleeve structure against the main sleeve structure causing the expandable sleeve to expand and form a load bearing blind head; the blind fastener includes a grip adjuster structure which defines a cavity having a depth selected to define the grip range of the fastener with the grip cavity generally located externally of the workpieces; the core pin head acts on the expandable sleeve and main sleeve structures to cause a frangible portion in the grip adjuster structure to shear and receive the main sleeve structure after which the blind head engages the blind side of the workpieces, with none of the clamp load developed b

Abstract: A blind rivet fastener which has a bulb forming collar that is assembled by sliding the collar down the shank of the fastener stem. The bulb collar is seated adjacent to the head of the stem. The stem has a shoulder and a pull portion that extend through the inner channel of a sleeve. The sleeve, shoulder and stem head are typically inserted into the matching holes of two workpieces. The sleeve has a head located at an accessible side of the workpieces and an opposite chamfered end located at an inaccessible "blind" side of the workpieces. The fastener is installed by holding the sleeve while pulling the shoulder through the sleeve channel. The stem head pushes the bulb collar, which engages the chamfered end of the sleeve. The bulb collar has an inwardly tapered end which bends the sleeve in a radially outward direction. The deformed end and sleeve head secure the sleeve to the workpieces.

Abstract: A metal fastener for use in attaching parts to a workpiece, for example a car bumper to a car body panel, is made in two pieces, which may be fixed together for example by a force fit, by adhesive or by welding. The fastener comprises a body, a thin walled portion which can be expanded to set the fastener, and two spaced apart head flanges. One of the two parts comprises the body and the other at least one of the head flanges.

Abstract: A device for fastening to the body of a motor vehicle an assembly comprising a support plate, is of the type comprising a bolt-and-nut assembly. The threaded shank of the bolt passes through a hole in the support plate, a hole formed in a damping ring which is interposed between the support plate and a first face of a bodywork element of the vehicle, and a hole in the bodywork element itself. The bolt is screwed into a nut which is located beyond the opposite face of the bodywork element, and which is received in a nut retaining cage. The damping ring and the cage are made integrally with each other as a single assembly member of elastomeric material or rubber; the portion of this assembly member that defines the cage deforms in expansion while the nut is being tightened on to the bolt.

Abstract: A member for fixing by radial expansion, the member comprising a pull rod having an expandable plug mounted thereon and surrounded over its entire length by a split ring, one end of the pull rod being connected to an endpiece, said plug being sandwiched between said endpiece and a thrust part also mounted on said pull rod, the member further including means enabling said endpiece to be moved towards said thrust part in such a manner as to compress the plug axially, thereby causing both it and said split ring to expand radially, wherein when said plug is uncompressed and at rest, said split ring is longer than said plug, said thrust part including a portion that constitutes a ram suitable for penetrating into said split ring, and wherein the end of said split ring includes a radially inwardly extending collar having the expandable plug and said endpiece bearing against opposite sides thereof.

Abstract: A fastener adapted to expand into bone has a tubular body having a longitudinal opening therethrough with a stop within the opening. The body has a head at one end and a longitudinal slot extends through the body near the other end to form ribs that expand radially when the body is compressed. A puller projects through the opening in the rivet and has a head that engages the other end to compress the rivet when the puller is pulled through the body. An annular recess is formed in the puller near the head and the other end of the body is crimped into the recess to aid expansion of the ribs. The puller is weakened at a point so that it will break upon continued pulling after the ribs reach a fully expanded state.

Abstract: A blind fastener having a body, a core bolt, a nut and a sleeve. The core bolt passes through an axial bore of the body and includes an externally threaded portion at an inner end thereof. The nut has an enlarged head, a reduced diameter stem and a threaded bore for engaging the threaded portion of the core bolt. The sleeve is located between the enlarged head of the core bolt and a conically shaped inner portion of the body. An inner end portion of the sleeve is fixed to the stem of the nut. In a preferred embodiment, the inner end portion of the sleeve is crimped to the nut and has a thickness sufficient to engage the nut across the full width of an annular shoulder of the nut during setting of the fastener.

Abstract: A blind rivet includes a mandrel shaft having a head disposed at one axial end. A hollow rivet shell has a cylindrical shape including an inner cylindrical surface and an outer cylindrical surface. The rivet shell surrounds the mandrel shaft. The outer cylindrical surface has at least one attenuation groove, which includes at least two recesses. Each recess has a bottom surface that substantially forms a secant with respect to the outer cylindrical surface. A method of manufacturing a blind rivet comprises the steps of placing a mandrel shaft having a head within a hollow rivet shell, producing at least one attenuation groove in an outer cylindrical surface of the rivet shell after the placing step so that at least two recesses are formed. Each of the recesses has a bottom surface that substantially forms a secant with respect to the outer cylindrical surface.

Abstract: A pressure-extrusion mechanical connector for interconnecting first and second structural elements, and including: a connector housing member coupled or coupleable to one of the first and second structural elements, with an interior volume in the housing member and an egress opening in the housing member communicating with the interior volume therein; an occlusion element arranged for selective translation into the interior volume, to correspondingly occlude at least a portion of the interior volume of the housing member; and a pressure-extrudable material, e.g., an elastomeric thermoplastic polymer, disposed in the interior volume. Pressure is selectively exertable on the pressure-extrudable material by the occlusion element when translated into the interior volume of the housing member, so that upon such translation, the pressure-extrudable material is extruded through the egress opening exteriorly of the housing, to form a gripping or locking extruded member.

Abstract: A blind rivet nut with a pulling mandrel, having a flanged rivet tube with an internal thread has the pulling mandrel in the form of a cap screw, the cap being used to engage a setting tool. The cap screw is a self-tapping screw.

Abstract: An arrangement for positioning components such as die or mold plates in shaping machinery, in which a positioning element is inserted into matching bores in the components to be positioned. The positioning element or device is provided with a cylindrical jacket around an axial bore and a continuous through-going slot. An elastic rod is inserted into the axial bore and is subjected to force from at least one end, for the purpose of increasing the thickness of the elastic rod and widening the cylindrical jacket so as to position the component. The components have, thereby, an elastic connection through the elastic rod. The continuous through-running slot provides elasticity by widening in accordance with the force that is applied.

Abstract: A rivet for joining two panels together including a solid member and a member having a tubular portion surrounding part of the solid member. In one form, the rivet has a solid shank and a tail with a tubular forward portion. The shank extends entirely through an aperture in the panels to provide good shear strength. The deformable tail retains the rivet within the aperture but does not damage the edges of the aperture, which may be composite material. The tail forward tubular portion surrounds the shank and is fastened thereto mechanically or by welding. A cavity is created between the head of the tail and the rear face of the shank so that under axial compression the tubular walls of the tail buckle outward. The tail is configured to provide grip range wherein the buckling will occur against the rear wall of the workpieces being joined within a given range of workpiece thickness.

Abstract: A fastener particularly suited to affixing metal to plastic parts, such as fastening electrical connectors to plastic circuit board mounting housings, includes a head and an elongate shank with an internally threaded through-bore. Located directly beneath the head is a shoulder which extends along the outside of the shank a distance equal to the total width of the parts to be joined. A mid-section of the shank is of reduced diameter, creating a thin-walled area of the shank compared with the areas at either end. A bottom part of the fastener includes internal threads, said bottom part beginning at the end of the thin-walled, mid-section of the shank. The through-bore includes a step down to a reduced diameter at the end of said mid-section. Therefore, when axially compressed, the fastener repeatedly bulges outwardly at its weakest point which lies just beyond the shoulder. The parts to be joined are thus trapped between the head and this radial bulge of the shank.

Abstract: An anchor bolt for anchoring in a hole of an arbitrary component includes a tension bolt having a threaded portion and an adjoining frustoconical head portion. An expanding sleeve has a polygonal cross section, a female-threaded portion and an adjoining anchoring portion to be expanded in sectors by the frustoconical head portion of the tension bolt when the tension bolt is screwed into the female-threaded portion of the expanding sleeve. The polygonal cross section of the expanding sleeve has sides with middle regions and axially parallel predetermined breaking lines each being formed in the middle region of a respective one of the sides for dividing the sides into partial lateral surfaces. Each two of the partial lateral surfaces extend outwardly from a respective one of the predetermined breaking lines and rise toward one another at an obtuse angle.

Abstract: A fixing member comprising a tie bar (4) having an expandable buffer (5) mounted thereon, the buffer being surrounded by a split ring (14) which is shorter than the length of said buffer (5), said expandable buffer bearing against an endpiece (6) linked to one end of the tie bar, and a nut (11) being screwed onto the opposite end of the tie bar to compress the expandable buffer (5) axially, thereby causing both the buffer and the split ring (14) to expand radially, the fixing member being characterized in that the inside surface of the split ring (14) has a helical groove (17).

Abstract: An anchor member having an anchor tube formed with an anchor plate orthogonally mounted to the tube, including slots directed through the tube to ease deformation of the tube upon internally threaded tube portion and drawn towards the anchor plate by a bolt member directed through the tube structure. The anchor plate includes a plurality of diametrically opposed apertures to receive a spanner tool structure to effect securement of the tube relative to the bolt structure.

Abstract: A blind rivet nut with a pulling mandrel, having a flanged rivet tube with an internal thread has the pulling mandrel in the form of a cap screw, the cap being used to engage a setting tool. The cap screw is preferably a thread-cutting screw.

Abstract: A chock hanger includes a generally cylindrical hanger body having an aperture therethrough with a tubular bushing mounted in the aperture. A cylindrical connector body has a flange extending annularly and outwardly from the forward end thereof which serves as a stop when the connector body is journaled through an aperture in a thin flat wall. A washer is interposed between the forward end of the connector body and the rearward end of the hanger body, and a screw is journaled through the hanger body, washer, and connector body and thence threaded in a nut mounted in the rearward end of the connector body. The screw cap has a diameter such that the cap abuts the bushing so that threading the screw into the nut compresses the connector body along the longitudinal axis thereof. The connector body is formed of a resilient flexible material which will deform when placed in longitudinal compression, thereby forming a bulge adjacent the exterior surface of the wall.

Abstract: A stepper motor of the permanent-magnet sheet-metal type is constructed of a number of modules, simplifying assembly. The modular parts include a stator having integrally-molded winding bobbins and pole pieces. A rotor mounted in the stator includes a barrier member which separates a plastic, threaded hub molded interiorly from a permanent magnet molded exteriorly. A shaft having a first threaded end rotatably engaged with the interior of the rotor hub has a rectangular central portion extending through a rectangular opening of the stator to convert rotary motion of the rotor to linear motion of the shaft. An opposite end of the shaft includes a molded head and a tubular shield extending from the head. This shield and a tubular portion of the stator molding define a labyrinthal passage which inhibits the passage of contaminants into the rotor. A housing of the motor and a rotatably attached flange include engagable portions to lock the flange at a desired angular position.

Abstract: Disclosed is a toilet seat cover closure device responsive to the flow of water in a toilet tank during a flushing operation to operate a push pin to urge the cover from a substantially vertical position to a horizontal position over a toilet seat on a toilet bowl. In a first embodiment the push pin is operated by a bowden wire in response to the pressure of water filling the water tank. In a second embodiment the push pin is operated by a cable arrangement responsive to the lowering of the water in the toilet tank during the first part of the flushing operation. With both embodiments a dampening mechanism is provided to control the rate of descent of the cover, comprising a spring-biased cam element cooperating with cam faces on the cover pivot shaft connected to move with said cover.

Abstract: A fixing element for fixing in a through hole accessible only from one side comprises an upsettable sleeve with a flange-like end and an insert member which is disposed in the sleeve and which has a flange-like head, the outside diameter of which is substantially equal to the outside diameter of the sleeve, with the underside of the head of the insert member being connected to the adjoining end face of the sleeve by direct contact therewith for the transmission of pressure therebetween, The sleeve can be deformed to produce a bead-like configuration by a axial pulling from applied to the insert member. There is a material bonding connection such as spot welds between the outer periphery of the insert member and the inner periphery of the sleeve in the end region thereof. In the region of the connection the sleeve comprises a round shank portion while in its deformable region it has a portion of polygonal section.

Abstract: Method for molding a strip of blind rivets, with each of the rivets having a pin within a sleeve and with the pin having a pulling head and shank, including a strip advance rod mounted in the apparatus for movement between first and second positions, a set of pin mold cavities and a set of sleeve mold cavities, a first runner for feeding the pin mold cavities and including a band around the rod, a second runner overlying the first runner for feeding the sleeve mold cavities, opposing mold members defining the sets of cavities and a sprue for feeding molding material to the runners, with the rod and strip moving together when the mold members are out of engagement for advancing the molded parts, and with the rod moving through the strip when the mold members are in engagement for returning the rod to the first position.

Abstract: A fastening device in the form of a plug and a screw is adapted for installation in a blind bore of a thick wall or in a through hole in a thin wall. The plug is formed as an elongated body having a central longitudinal hole. The body has inner and outer end portions and two parallel slots extending longitudinally between the end portions to define four legs arranged circumferentially around the body. The legs diverge from the end portions to form an increasing diameter for the body which reaches a maximum at the center of the body. When the plug is inserted into a blind bore the legs are displaced inwardly to reduce the size of the central longitudinal hole so that when the screw is inserted into the plug, the screw will exert force on the legs to press the legs against the wall with strong radial forces.

Abstract: In a blind rivet having a blind rivet body which comprises a rivet head with a hollow shank formed thereon and through which extends a rivet pin which carries a thickening portion arranged at the end of the hollow shank outside the rivet body, the end of the rivet pin, which is remote from the rivet head, in the region of the clamping chuck which engages same in the setting operation, has a portion which decreases towards the rivet head, preferably a cone portion. An apparatus for setting a blind rivet of that kind has a clamping chuck which during the rivet setting operation engages the cone portion of the blind rivet, wherein the engagement surface of the clamping chuck extends from the inside outwardly in the pulling direction, being matched to the cone portion.

Abstract: A fastening which allows a bolted-on cap to part from a body when excessive pressures develop in a cavity in the body, comprises a nut and bolt arrangement, and includes a weakened tubular spacer surrounding each bolt, between the bolt head and the cap. The wall of the spacer is drilled or scored in its mid-length area. The material and proportions of the spacer, and the proportions of the score or drilling, are so matched in relation to a particular pressure environment, that on excessive pressure developing, the load exerted on the cap causes the spacer to collapse in controlled manner, rather than merely crushing or breaking.

Abstract: An expandable plug particularly adapted to plug an engine's oil pan drain hole. The expandable plug includes a threaded bolt, a compression plate assembled with the bolt, and a compression nut assembled with the bolt and adapted to bear against the compression plate. A resiliently deformable section of tubing is assembled in slip fit relation with the bolt, the tubing section being axially compressible and radially deformable but not being a specially molded part. With the plug located within the pan's drain hole, tightening of the compression nut causes the tubing section to bulge outwardly into a liquid sealing with the hole, and also to bulge inwardly into liquid sealing relation with the bolt, thereby plugging the drain hole against oil flow therethrough.

Abstract: A fastener for blind installation where only one side of a workpiece is accessible for installation of the fastener. The fastener utilizes two methods of deformation on its blind side. The fastener has a tubular body made of a ductile material with a head at one end. A separate expander nut is made of a harder material and adapted with internal screw threads. The expander is engaged by a threaded pulling mandrel attached which protrudes through the tubular fastener to be installed. The pulling mandrel engages the expander by means of the screw thread and pulls it onto the tubular sleeve which then fails in columnar buckling to form a substantial bulge and foot print on the blind side of the workpiece.

Abstract: A blind insert having a compressible plastic bushing having a flange at one end which merges into a first cylindrical portion and a second reduced diameter cylindrical portion at the other end. A metallic end cap is secured on the free end of the plastic bushing and is spaced from the first cylindrical portion and the dimension of the first and second cylindrical portions are selected so that as a screw is inserted into the fastener the first cylindrical portion will bulge outwardly and rearwardly to extend over the open end of the cap to forcefully center the cap to prevent tearing of the bushing.

Abstract: A fastener having an elongated shank formed of a shape memory alloy, a head at the upper end of the shank, and an annular segment at the lower end of said shank having a deformed cross-sectional shape suitable for insertion into an opening extending through adjacent workpieces. The annular segment has a frusto-conical trained shape that is larger than this opening. The annular segment radially flares from the deformed shape to an approximation of the trained shape when heated above a critical transformation temperature, thereby securing the fastener in place with respect to the workpieces. Alternatively, a sleeve made of a different material (e.g. aluminum) extending over a portion or the entire length of the fastener can be added for improved deformational characteristics, by providing the same frusto-conical shape through axial contraction of the shank.

Abstract: This invention deals with a device which is useful for the securing of roof structures, especially laminar type roof structures wherein an integral, obstensibly waterproof, covering is used as part of the laminar structure. It also deals with a unique method of detecting leaks in roofing structures which allows the location of such leaks with a certain preciseness by using the fastening devices of this invention as points of reference.

Abstract: A blind fastener that is installed from one side only of a hole in a plate structure wherein the blind fastener has a tubular body with a head and a sleeve loosely journaled in the central bore of the tubular body. The sleeve has an upper portion that is retained within the central bore and a lower portion larger in diameter than the upper portion presenting a shoulder that abuttingly engages the annular end of the tubular body. The sleeve is retained in position on the fastener by tabs extending from the tubular body through slots in the lower portion and extend radially to limit the axial movement of the sleeve. The central bore of the sleeve is threaded to receive a fastening bolt as well as the draw rod that effects the upsetting of the fastener.

Abstract: A blind fastener for securing workpieces is provided having as principle components a stem member, a drive-nut, and a deformable annular means. The stem member has an externally-threaded-portion on the accessible-side thereof, and may have a stem-head on the nonaccessible side thereof. The drive-nut to be screwed onto the externally-threaded-portion of the stem member. The deformable annular means has as principle parts a head which is larger in diameter than the diameter of the boreholes of the workpieces, and an intermediate-part adjacent the head and having an outside diameter slightly smaller than the diameter of the boreholes, and a deformable tail-part adjacent the intermediate-part and abutting and stem-head for securing the workpieces when the fastener is set. The outer-portion of the stem member contains a turning means for rotating the stem member relative to the drive-nut.

Abstract: A blind fastener comprises a fastener body, a stem and a shaped shear ring wire. The shear ring is disposed in an annular groove disposed intermediate the ends of a neck portion of the stem. When the fastener is installed, a bulbing portion of the shear ring upsets the tail end of the fastener and then shears at a predetermined load. An anchored portion of the shear ring travels through the fastener body, with an enlarged neck portion of the stem radially expanding the fastener to fill the hole within the workpieces being secured together. A lock ring groove is formed in the stem midsection of smaller diameter at the intersections of the stem neck and midsection.

Abstract: A dynamic electric machine such as a totally-enclosed fan-cooled machine has an end bracket having a plurality of seats to which a cover such as a fan cover is fixed through a plurality of generally cylindrical rubber bushings. The bushing has a nut embedded therein near one end thereof and an outer peripheral flange portion formed on the other end thereof. With the cover being placed on the flange portions, bolts are driven into the nuts from the outer side of the cover so as to fix the cover to the seats through the rubber bushings.

Abstract: A blind one piece expansible fastener which has a tubular body with an annular flanged head portion at one end thereof. The upper portion of the tubular body which extends from the flanged head portion has a constant wall thickness. The intermediate tubular portion of the fastener which can be upset has its wall thickness increasing towards the lower portion, which lower portion is internally threaded. The intermediate portion is buckled radially outwardly against an apertured work to secure the fastener thereto. The exterior diameter of the tubular body is of a constant diameter.

Abstract: A plastic hollow wall anchor having folding arms for insertion within a limited diameter aperture in a substrate such as a wall. The arms, adjacent their overlapping attachment areas, are configured to provide a "sharp knife edge" intersection, whereby a spacing between the attached arms, during folding and aperture insertion, is substantially eliminated. The load bearing arms are concomitantly thickened and thereby strengthened within the limited dimension afforded by the aperture. Alternatively, the overall dimensions of the anchor are reduced, while maintaining the load bearing arm dimensions, thereby enabling the use of a smaller diameter for the insertion aperture without decrease in anchor holding strength.

Abstract: A blind fastener and method for making such fastener that has a flanged outer sleeve and a flanged inner sleeve that are secured together, wherein the outer sleeve has a socket that receives a lug from the inner sleeve to provide joint axial movement and wherein the outer sleeve has a plurality of slits that receives at least one radial projection from the inner sleeve to prevent rotation between sleeves. The inner sleeve has a thinner upper portion and a thicker lower portion with a score line therebetween to facilitate the separation of this portion. The inner sleeve has a central threaded bore to receive a threaded bolt for fastening purposes and to upset the outer sleeve relative to the flanged portion thereof to secure such fastener to a thin workpiece.

Abstract: A fastener for securely fastening a plurality of members having a sleeve with a generally tubular portion and a flange extending radially from one end of the tubular portion and having a mandrel with an enlarged head and a generally cylindrical stem, the stem having a grooved locking section in which the locking groove has a longitudinal component and an adjacent tapered section containing a breakneck groove, the tapered section tapering radially outward toward the mandrel head and ending in a shoulder having an outer diameter signal to or greater than that of the locking section to provide a surface for improved retention of the mandrel with respect to the sleeve when the fastener is installed.

Abstract: A pipe plug is disclosed which includes a disc-like screw plate, an elastic sealing ring, a horn-like pressure block, and a lifting eye. The screw plate receives the bottom edge of the sealing ring and the horn-like pressure block is mounted on the upper edge. The screw plate has a central rod that extends upwardly through a hole in the pressure block. The lifting eye is then threadedly received on the end of the rod and as the lifting eye is turned, the block and plate will be urged together causing the sealing ring to expand against the internal wall of a pipe.

Abstract: The invention is a close out fitting for installing in a structural element, the structural element having a port extending from a first surface to a second surface thereof, the port countersunk at both ends, and a method of installing the closeout fitting. In detail, the fitting comprises a hollow, tubular sleeve having a flared first end, a flarable second end and internal threads therebetween. The fitting further comprises a plug having a head portion and a shank portion attached to the head portion with the shank portion having external threads.

Abstract: A plug for sealing the internally threaded circular cylindrical stud holes in the flange of a nuclear reactor vessel during refueling comprises a circular cylindrical body of dense wear resistant polymer, a circular reaction plate axially spaced from one end face of the plug, an annular grommet of elastomer resistant to weak acid held between the reaction plate and the body having an exterior conical surface. A tool extends into the body and applies a torque for turning threads into the internal threads of the stud hole thus drawing the grommet into the stud hole such that it deforms against the interior of the stud hole and the surface of the flange adjacent the stud hole.