Abstract: The invention relates to a gun rivet and a device for placing said rivet. The gun rivet contains a rivet head (1) with a collar (3) at one end and a rivet tip (6) at the other. The rivet body contains a cavity (7) in the form of a bore in a sleeve section (22). As with other gun rivets, the gun rivet is shot with a percussive-type action and with the aid of its rivet tip into an opening in two sheets (13, 14) that are to be joined together, until the collar comes to rest on the upper face of the upper sheet. A tensile bolt is then introduced into the cavity and is connected to the base (8) of the latter. This can be achieved by resistance welding. The tensile bolt is then drawn until a rivet head is formed on the opposite side of the two sheets. The tensile bolt is then detached from the gun rivet, for example by shearing. The tensile bolt can be re-used to place another rivet.

Abstract: A blind rivet assembly includes a mandrel having a male threaded portion at its distal end to be screwed into an internal female threaded portion of a rivet body. The mandrel has a section of enlarged diameter adjacent the male threaded portion joined by a breaker groove to a pulling portion. The section of enlarged diameter is accommodated within an internal bore of the collapsing portion of the rivet body, the collapsing portion having a radial groove on the outer surface thereof for improving the radial expansion of the rivet when installed. A shoulder in the internal bore supports a sealing ring. When assembled correctly, the pulling portion breaks off at the breaker groove.

Abstract: A device for sealing an opening in a structural member and/or for sealing a plurality of openings in overlapping members, or for hanging an object on a wall. The device includes a deformable member having a substantially cylindrical stem and a flange at a first end of the stem. In some embodiments the deformable member is constructed of a compressible material that has good sealing capabilities. The stem is configured to extend through at least one opening in the at least one structural member such that the flange abuts a surface of the structural member. A reinforcing sleeve extends around the stem and provides a protective barrier between the at least one structural member and the stem. The sleeve may be constructed of a relatively hard and durable material such as a polymer, a metal or a ceramic. In some embodiments the sleeve is substantially cylindrical with at least one tab extending from a lower end thereof. In some other embodiments the sleeve includes a flange at an upper end.

Abstract: A blind rivet for a threaded joint between a support member and a mounting member consists of a body of elastic material and a sleeve of metallic material. The body is formed as a sleeve-shaped shank adapted to be inserted into a mounting hole of the support member. The shank has a mounting flange and a folding zone adapted to be folded into a fold by a folding operation. The mounting flange and the folding zone are adapted to be supported against opposite sides of said support member. The sleeve of metallic material is disposed within the body. There are provided means for preventing twisting and torsional deformation of the body.

Abstract: The current invention is directed to a three piece blind fastener comprising a mandrel 40, a tubular body portion of 10 and a radially extending flange 14, wherein the cylindrical body 10 is mounted on an elongate stem 42 of the mandrel so as to extend co-axially about a central axis of such blind fastener, and the mandrel having a mandrel head in operative engagement with a tail end of the body for transmitting force there to during setting of the fastener, wherein the radially extending flange is separate from and held in crimped engagement with the body portion at or towards a front end of the tubular body so as to be axially remote from the tail end of such body.

Abstract: A device for connecting component parts includes a blind rivet nut adapted to be anchored in one component part by a riveter which has a threaded stud; a spacer which is in threaded engagement with the blind rivet nut and, by being screwed-out, reaches a position in which it is supported at the other component part; a connecting screw adapted to be screwed into the blind rivet nut; and a torque transmitting intermediate member, which is accommodated in a receptacle of the spacer and transmits a torque onto the spacer when the connecting screw is screwed in. For anchoring the blind rivet nut in the one component part, the threaded stud is capable of being inserted into the intermediate member and the spacer and then being screwed into the blind rivet nut without causing the spacer to be rotated in its screw-out direction.

Abstract: A blind rivet nut has a head configured as an annular flange and a shank comprising a head end, a foot end and a cylindrical bore closed at the foot end of the shank and extending from the head end to the foot end in lengthwise direction, and a second bore segment near the head end whose diameter is greater than the diameter of the first bore segment. The wall surrounding the second bore segment forms a plastically deformable region of the shank, and has an outer surface with the shape of a regular polygonal, in particular hexagonal, prism. To achieve a uniform and tightly sealing contact of the flange with the part accommodating the blind rivet nut, the wall thickness of the deformable region in the thinnest places is 4% to 6% of the least outside diameter of the deformable region.

Abstract: A multi-grip blind rivet 74 includes a rivet body 82, adapted to receive a portion of a mandrel 76. A plurality of indentations 88 are formed in an outer surface 86 of the rivet body 82 in each of three axially spaced transaxial planes. Each indentation 88 is formed with a work hardened base surface 90 having a convex portion, which is formed with axially spaced first and second transaxial edges 106 and 108 having nonlinear portions. Adjacent indentations 88 are separated by ribs 89. A flared intermediate surface 122 extends between the base surface 90 and the outer surface 86. The rivet 74 is assembled within aligned holes 128 and 130 of workpieces 124 and 126, respectively, where, upon setting of the rivet, the indentations 88 collapse and the outer surface 86 bulges against walls of the holes to retain the workpieces together.

Abstract: The invention relates to a plastic nut for mounting on a component having a penetration, said plastic nut being insertable into the penetration with a nut piece having a receiving hole for a screw and being provided with a flange for contact with one side of the component and with snap-on hooks for contact with the other side of the component, said snap-on hooks securing the plastic nut to the component, wherein, when in the relaxed position, said snap-on hooks on the one hand conform in their radial extent to the internal dimension of the penetration and on the other hand cover the receiving hole and spread apart when the screw is inserted and position themselves opposite the component.

Abstract: A wall anchor (1) has a head shaft (5) and a screw nut shaft (6) on the same longitudinal axis (4), connected to each other by a plurality of approximately longitudinal small bars (7). The bars (7) are plastically flexible in a direction away from the axis (4). The screw nut shaft (6) is equipped with teeth (18) of generally triangular shape. The teeth (18) form a longitudinal projection with respect thereto and converge on the axis (4) to define a point (22) to perforate or drill a partition (8).

Abstract: This invention provides a design of an adhesive encapsulated blind rivet for joining an assembly of overlying parts having an accessible side and an inaccessible side. The rivet comprises a rivet head and tubular rivet body. A mandrel is inserted through the open end of the tubular rivet body and through a mandrel hole in the rivet head. A mandrel head engages the end of the tubular body. The tubular body is filled with a mass of latent adhesive around the mandrel. The rivet body is longer than the thickness of the parts to be joined to accommodate a substantial amount of adhesive for expulsion through holes in the rivet body located within the thickness of the assembled parts. The portion of the rivet body extending beyond the blind side of the assembled parts is weakened in a pattern of corrugations or other bands for folding of the end of the tubular body in setting the blind side of the rivet and expelling the larger quantity of adhesive against and between the riveted parts.

Abstract: A blind fastener for securing a plurality of workpieces is provided that has a sleeve, and a pin member. In an alternate embodiment, the blind fastener has a sleeve, a pin member and a nut. The sleeves have a head with a plurality of rearwardly sloping recesses disposed therein. The recesses are adapted to be engaged with a plurality of rearwardly sloping nibs disposed on one end of a nose secured to an installation tool. The pin members have a splined head adapted to be engaged with a splined driver secured to an installation tool. Use of the splined head on the pin member, the splined driver, rearwardly sloping recesses on the sleeve, and rearwardly sloping nibs on the nose eliminates camming out of the nibs from the recesses during installation of the blind fastener. A nose assembly for installation of the blind fastener is also provided.

Abstract: A blind rivet having a mandrel with a predetermined breakable stem disposed within a body with a bored shank. A radial flange is formed on one end of the shank to engage a workpiece and at the other end of the shank there is disposed within the shank an enlarged head of the stem the diameter of which is greater than the diameter of the bore of the shank. The breakneck of the stem formed with at least two series of radial impressions formed around the circumference of the shank at predetermined distances from the flange. Ribs are formed alternately between the radial impressions in the same horizontal series therewith.

Abstract: An insert for installation in a relatively thin or weak workpiece to provide an anchor for a self-tapping screw, which insert is in the form of an integral metal structure which comprises: a body portion; a head portion located at or near one end of the body portion and extending radially therefrom; a receptacle portion located at the other end of the body portion remote from the head portion; and a through bore extending throughout the head, body and receptacle portions; the interior bore of the receptacle portion being substantially unthreaded for the reception of a self-tapping screw; in which the exterior cross-sectional shape and dimensions of the receptacle portion, and the interior cross sectional shape and dimensions of the body portion are respectively such that the body portion is deformable, when the receptacle portion is drawn towards the head portion, to secure the insert in a suitable hole in a workpiece through which the receptacle and body portions have been inserted so that the head portion i

Abstract: A fluid-tight, adjustable and self-locking threaded connection assembly comprising a nut and a bolt. The nut which is adapted to be fixed to a first structural member has a bore comprising a threaded portion and a smooth cylindrical portion. The bolt which is adapted to be removably connected to a second structural member has an intermediate portion provided with a plurality of circumferential sealing lips. The sealing lips are dimensioned with respect to said smooth cylindrical portion of the nut bore such that it is slidingly urged against said smooth portion of the nut bore when the bolt is adjusted relative to the nut. As a result thereof the threaded connection assembly is fluid-tight and self-locking while being adjustable.

Abstract: A threaded blind insert includes a shank with an axial bore therethrough having a head at one end and a threaded region of the bore at the opposite end. The wall of the shank between its outer surface and the bore includes a weakened deformable portion created by a reduced outside diameter of the shank in that area. A reinforcement collar integral with the shank is located at approximately the middle of the deformable portion of the shank thus providing a more rigid area at the collar which creates bulges in the deformable portion on either side of the collar when the insert is compressed. A flange located adjacent the underside of the head of the insert has an outer diameter greater than the shank but less than the head. When fitted into a mounting hole of a workpiece, the flange centers the insert and provides an annular gap between the shank and the mounting hole.

Abstract: The rivet includes a screw element which rotates within a body element. The body element includes an upper collar, integral with the body head, which is longitudinally stabilized with respect to the rotating screw element. The body element further includes a lower collar which is internally threaded and engages the external threads of the shank of the screw element. The lower collar therefore traverses a portion of the shank of the screw element as the screw element rotates. Folding legs join the upper collar and the lower collar. In the uninstalled position, the folding legs are parallel to and abut the screw shank. However, in the installed position, the lower collar approaches the upper collar and the legs fold so as to be substantially perpendicular to the screw shank.

Abstract: An improved expansion screw and particularly an expansion screw for securely anchoring on various types of solid walls and hollow walls mainly includes a bolt and a nail tube. The nail tube has a front end fastened to a nut, a middle portion formed at least one expansion section which has carved slots formed thereon in an annular manner, and at least one -shaped slot formed annularly between the nut and the expansion section. Each -shaped slot has an expansion flap located therein. Every two neighboring -shaped slots are bridged by a longitudinal connection strip to form a bend section. When the bolt nut at the front end of the bolt is turned and driven to generate an inward compression, the expansion flap is forced to extend outwards and overlap with the annular ring at the front end of the nail tube, and the longitudinal connection strip is bent outwards on the bend section to form a double compression on the inner side of a construction hole in a wall to form a secured coupling.

Abstract: A multi-grip blind rivet 74 includes a rivet body 82, adapted to receive a portion of a mandrel 76. A plurality of indentations 88 are formed in an outer surface 86 of the rivet body 82 in each of three axially spaced transaxial planes. Each indentation 88 is formed with a work hardened base surface 90 having a convex portion, which is formed with axially spaced first and second transaxial edges 106 and 108 having nonlinear portions. Adjacent indentations 88 are separated by ribs 89. A flared intermediate surface 122 extends between the base surface 90 and the outer surface 86. The rivet 74 is assembled within aligned holes 128 and 130 of workpieces 124 and 126, respectively, where, upon setting of the rivet, the indentations 88 collapse and the outer surface 86 bulges against walls of the holes to retain the workpieces together.

Abstract: A holding fastener 1 comprising a shank 3 adapted to be inserted into a mounting hole of an attachment member. The holding fastener having a first holding portion 5 disposed at one end of the shank and adapted to extend radially and outward from the mounting hole of the attachment member to engage and hold one surface of the attachment member, and a second holding portion 6 disposed at the other end of the shank and adapted to engage and hold the other surface of the attachment member. The second holding portion 6 includes a holding piece 9 connected to the shank 3 through a hinge 7 to allow the holding piece to be pivoted or rotated between an insertion position extending along the axis of the shank and a holding position extending orthogonal to the axis of the shank. An insertion tube 15 is provided at the one end of the shank. The insertion tube 15 is adapted to be inserted axially into a hollow portion of the shank from the side of the first holding portion to the side of the second holding portion.

Abstract: An anchor for boards is provide which comprises a socket including a tubular portion, a plurality of split pieces integral with the tubular portion and having intermediate portions slightly bent outwardly, the socket being integrally provided with a flange at one end thereof and a nut member at the other end thereof, and a screw inserted into the socket and threaded into the nut member. The split pieces have their outer peripheral surfaces covered with a resilient member. Also, a method for manufacturing the anchor is provided.

Abstract: An apparatus is provided for retaining a threaded fastener in an aperture of a support. The apparatus includes a flange position to limit the insertion of the apparatus within the aperture of the support. The apparatus also includes a body extending axially from the flange and being sized for insertion within the aperture of the support. The body defines an opening extending through proximal and distal sections of the body. The opening in the body is sized to receive a threaded fastener in the proximal section of the body, and the opening in the body is sized for engagement of the threaded fastener in the distal section of the body. The proximal section of the body is configured for radial deformation upon engagement of the threaded fastener in the distal section of the body. Such deformation prevents removal of the body of the apparatus from the aperture of the support. A fastener system and a rack mount computer cabinet including the apparatus are also provided.

Abstract: Disclosed is a self plugging blind rivet for securing together apertured members, the rivet comprising a tubular shell having a tail end face at one end and a preformed radially enlarged bead at the other end, and a stem that extends through the shell and has a stem head adjacent the tail end face of the shell and a breakneck located away from the stem head, in which the region of the stem shank on the stem head side of the breakneck has a plurality of depressions formed therein extending to the breakneck, the corresponding region of the shell substantially filling the depressions in a region adjacent the stem head and progressively less towards the breakneck whereby, in use and under axial compression loading of the shell, the shell preferentially buckles in the region adjacent the member remote from the preformed head to form a blind head in contact with the member so as to clamp together the apertured members.

Abstract: A blind rivet formed with a tubular shell, and a mandrel extending through the shell. The shell has an outwardly extending flange at one end forming a rivet head, and having a first set of radial indentations arranged around the periphery of the shell at a first distance from the rivet head, and a second set of radial indentations arranged around the periphery of the shell at a second distance from the rivet head. Each of the radial indentations are formed by crimping them in the rivet shell after the shell has been positioned around the mandrel with the end of the shell remote from the rivet head defining the blind end of the rivet shell. Lastly, the mandrel having a head formed at one end to abut against the blind end of the shell, and the stem extending from the head having a point of weakness part way along the length thereof disposed within the shell.

Abstract: A blind rivet having a mandrel with a predetermined breakable stem (4) disposed within a body with a bored (18) shank (14). A radial flange (16) is formed on one end of the shank and the other end (20) of the shank is engaged with the enlarged head (2) up the stem the diameter of which is substantially equal to that of the shank. The mandrel below the enlarged head has a plurality of indentations (8) formed on the stem to define a square of reduced cross-sectional area. The shank has an enlarged internal cross-sectional area (22) to substantially engage the indentations of the stem below and adjacent to the enlarged head of the stem.

Abstract: A thread-insert device is provided including a hollow-cylinder shaped sleeve part having an upper and lower sleeve edge and at least one supporting recess located on said upper sleeve edge; and a hollow-cylinder shaped thread insert, having two ends, a central axis, internal threads, and at least one supporting edge part projecting outwardly at one end of the thread-insert substantially perpendicularly to the central axis. The at least one supporting edge part is structured to be received by the at least one supporting recess, wherein the at least one supporting edge part is movable within the at least one supporting recess, and wherein the thread insert is movable within the sleeve part.

Abstract: An expandable anchor assembly removably secured to a wall, floor or other supporting structure for purposes of mounting any one of a variety of objects on the supporting structure, wherein the anchor assembly comprises an elongated sleeve including an interior, coaxially disposed channel extending along the length thereof between and in communication with open proximal and distal ends of the sleeve. A connecting structure is secured within the channel substantially adjacent to the distal end thereof and is cooperatively structured with an attachment portion of a connector, removably disposed within the channel through the open proximal end and into moveable engagement with the connecting structure.

Abstract: A blind rivet (10) comprises a substantially cylindrical body (2) and a mandrel (4) which body includes one or more circumferential grooves (12,14) formed on the outer face of the body. Each groove (12,14) is reinforced by one or more axial reinforcing ribs (16).

Abstract: A blind fastener for clamping sheet components and including a mechanical lock to prevent loosening of the fastener. The fastener is self-expanding following insertion and engagement of the threaded stem. The fastener includes an internally threaded nut body, an externally threaded stem threadably received within the nut body, and a lock sleeve matingly receiving the nut body. Carried on the stem is an expandable sleeve which expands to engage the underside of the material. Rotation of the stem following insertion of the assembly into the aperture will draw the stem head and expandable sleeve against the backside for the material causing the sleeve to expand outwardly. In addition, the locking sleeve is pushed beneath the expansion sleeve wedging between the threaded stem and expansion sleeve. This mechanical lock is resistant to vibration locking the fastener against loosening.

Abstract: Mourning apparatus for retaining and isolating a machine subject to vibratory forces. A base plate having a series of raised bosses on its top surface is equipped with rubber grommets that are received upon each boss. Each grommet has an expanded foot and an elongated body that is insertable into the mounting hole of a machine support bracket. A weakened section is provided in the top part of each body that expands radially when the body is compressed to provide an upper flange for capturing the support bracket between the foot piece and the upper flange. Each grommet is compressed by passing a bolt axially through the grommet and through the bolt into the boss.

Abstract: A breakable-stem blind rivet (5) is having a mandrel (10) with an enlarged head (12) which is positioned in a shell (20). Before the beginning of the setting operation, the shell (20) is having an exterior diameter which at all points is smaller than the interior diameter of the hole (4) in which the breakable-stem blind rivet is to be set. The breakable-stem blind rivet therefore without any preformed set head has basically the form of a hollow cylinder. Preferably the shell (20) on both sides of a central section (21) is provided with areas (23, 25) in which the shell (20) is more easily deformable than in the central section (21). An apparatus for setting the breakable-stem blind rivets of this kind is provided with a workpiece pressing means (32) surrounding a mouth piece (30) which with respect to the mouth piece (30) is relatively movable and is exerting a force onto the front side of the workpiece.

Abstract: Extended fatigue endurance and high pre-load are achieved in a structural blind fastener by combining the best features of screw type and pull type blind fasteners. We replace fatigue critical details from the shear plane with close tolerance, slip fit, core bolt and outer bolt shanks to obtain the desired structural load paths while retaining anchoring features of screw type fasteners to introduce adequate pre-load. These fasteners are compatible with currently available blind bolt insertion tooling.

Abstract: A rotatably fastening blind rivet is provided. The blind rivet includes a tubular rivet body of ductile material and an elongate stem engaged into the rivet body which has a radially enlarged rivet head of hexagon configuration at one end having a serrated surface and a central bore, a threaded inner periphery of predetermined pitch and number of threads in an upper region and a progressively introversion inner periphery in a lower region of the body. The stem includes a cylinder shank of threaded outer periphery engageable with the threads of the rivet body, a breakneck on the top of the shank from which a tensioning rod of hexagon spiral outer periphery extends upward and is slidably engageable with the central bore of the rivet head and a terminal head of stiffness material at a lower end of the shank remote from the rod having serrated surface toward the shank.

Abstract: An expansion plug has at least one tensioning member, an expansion means formed by a system of at least two expansion tubes encircling the tensioning member and fitted one within another, each of the expansion tubes being provided with a series of slots which are equally spaced in a circumferential direction to retain peripheral sections of the expansion tubes between the slots, the slots extending over a part of a length of the expansion tubes, the tensioning member and the at least two expansion tubes being dimensioned and shaped so that by inserting an axial relative movement the peripheral sections are radially expanded in order to achieve an anchoring effect, the slots of the at least two expansion tubes having a shape which is helical in relation to an axis of a respective one of the expansion tubes, the slots having a slope such that the slope of radially adjacent ones of the expansion tubes are of mutually opposite hand, the expansion tubes being arranged to be non-rotatable relative to one another.

Abstract: We achieved extended fatigue endurance and high pre-load in a structural blind fastener by combining the best features of screw type and pull type blind fasteners. We replaced fatigue critical details from the shear plane with close tolerance, slip fit, core bolt and outer bolt shanks to obtain the desired structural load paths while retaining anchoring features of screw type fasteners to introduce adequate pre-load. Our fasteners are compatible with currently available blind bolt insertion tooling. The present invention pertains to a lightweight version of the structural blind fastener wherein we set the backside anchor collar with matching threads that engage between the outer sleeve bolt and inner core bolt.

Abstract: The present invention concerns a self-cutting blind rivet/expansion rivet without draw nails in the core of the rivet, a method for blind riveting/expansion and an apparatus for performing the method, together with a function for expansion by a combination of these within the same process. There is described a blind rivet (101) expansion rivet (300) which comprises a head (101) with an engagement body (102) for co-operation with a complementary screw nose on a mounting tool, a self-drilling tip (103) in the outer end of the rivet and an axial hole (104) which at least over part of its length is provided with a conical section for attachment from the tool for mounting the rivet, and in addition a mountable head (FIG. 3A) for expansion/riveting which is equipped with a clamping sleeve (303). A self-drilling blind rivet system comprises a tool for placing and expanding the rivet in the same process, where the tool's nose head increases the area of application within a number of fastening systems.

Abstract: A device for securing a floor mat to the floor carpet of an automobile, comprising a base plate with an aperture that is positioned on top of a hole in an automobile floor carpet and two leg members attached to the base plate near the aperture and extending downward through the hole. The leg members are foldable at intermediate portions thereof such that the intermediate portions can move apart from each other. A connecting section is attached to the bottom ends of the two leg members to connect them together. A post having at least one prong is mounted on the connecting section and extends upward toward the base plate such that when the leg members are folded, at least a portion of the post extends through the aperture in the base plate and the hole in the carpet. The post also has means for maintaining the leg members in a folded state so that the post extends through the aperture in the base plate. The invention also comprises means for detachably engaging the post with a floor mat.

Abstract: A self-tapping, blind setting bolt rivet assembly capable of permanently fastening one or more sheet metal work pieces or the like together while also providing a hollow cylindrical threaded bolt head onto which a nut may be affixed to a means to removably attach other work pieces, components or the like. The rivet assembly comprises a rivet body having a hollow tubular sleeve and a threaded stud separated by an enlarged flattened head. The rivet body surrounds a mandrel comprising a shank which is terminated in a screw tip. This screw tip punctures, spreads, and self-taps an aperture in the work pieces through which the rivet sleeve passes. The mandrel's shank may have a weakened area of reduced diameter adjacent to the screw tip which allows detachment of shaft following application of sufficient axial force to the shank. This application of force sets the rivet by causing a tapered shoulder section of the mandrel to deform the rivet sleeve.

Abstract: I claim a self fusing fastener device with radially expansible wings that permanently lock into place through an adhesive means which causes the fastener to act as a single rigid attaching element that resists pull out as a result of the interference fit produced by the radially expansible folding and flaring elements.

Abstract: A retainer has inner and outer subsections that are hingedly connected. An outer portion is hingedly connected to the outer subsections. The outer subsection rotates on its hinge relative to the outer portion, and axially back towards the inner surface of the wall to contact the wall. The inner subsection extends to a connection with the inner head portion. The inner and outer subsections are in abutting contact adjacent to the hinge. The abutting contact creates a holding force at the point of contact between the hinge and the inner wall. This results in a truss-like configuration that securely retains the retainer in the wall.

Abstract: A blind rivet comprising a mandrel 2 and a sleeve 3 is provided with two external grooves 11, 12 of different cross-section. This enables the rivet to set on the blind side of a workpiece to form a taper 19 increasing in diameter towards the blind side of the workpiece 20.

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 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 number of improvements to anchoring retainers are disclosed. The improvements ensure that the retainers are securely attached to walls, and that they do not move during attachment after being attached by a threaded fastener.

Abstract: An expansion anchor including an anchor stem having a holding flange and a lock member having a corrugated portion is inserted into a fitting hole bored in concrete or another rigid material. The anchor is secured in the bore by forcing the lock member to squash the corrugated portion. The corrugated portion thus squashed expands into engagement with the inner surface defining the bore so that the expansion anchor is steadily secured in a non-removable state.

Abstract: A screw grommet 1 which is capable of dealing with a change in the thickness of panel comprises a grommet member 3 and a holding member 2 to hold the grommet member. The holding member comprises a flange formed larger than a mounting hole of a panel 33 and a leg portion 4 which extends downward from the flange, is formed with, in its center, a space to receive the grommet member, and passes through the mounting hole of the panel so as to extend to the bottom side of the panel. The grommet member 3 comprises a head 17 which is fixed so as to be prevented from vertical movements when received in the leg portion of the holding member, a tubular portion 19 which is received vertically movably in the leg portion of the holding member and is formed with a hole for a tapping screw 5 to be screwed thereinto, and a pair of connection arms 20 which connect the tubular portion to the head and bend so as to project radially outwardly in mid portions 25 thereof when the tubular portion is brought closer to the head.

Abstract: A plug is suitable for use in preformed blind holes in rigid and soft material and also holes in sheetform material.The plug comprises a head portion (2) joined to a tail portion (10) by four legs (12), all having flexing points (20, 22, 24) towards their ends and in a central portion.The tail portion has a thread formation (16, 18) formed by a moulding process.

Abstract: A sheet-metal nut for blind fastening a screw in a hole of a carrier plate, the nut having a top plate bearing on an upper surface of the carrier plate having a hole therein and an aperture for the passage of the screw, a base plate having a threaded portion adapted to be inserted into the hole in the carrier plate located at a distance from the top plate and a plurality of connecting webs connecting the base plate to the top plate that fold outwardly in use. The nut is formed from a single piece of sheet metal, the connecting webs being integrally connected at one end to opposite sides of the base plate and at the other end to two top plate halves that lie adjacent each other in the same plane and form the top plate.

Abstract: A blind fastener for fastening panels, especially panels made of composite materials, comprises a fastener body received within aligned openings in the panels and a cylindrical stem passing through the fastener body. The stem has an enlarged stem head spaced from an inner end of the fastener body which projects inwardly beyond the inner surface of the inner panel. A deformable sleeve mounted on the stem between the stem head and the inner end of the fastener body is a two-piece sleeve comprising a forming sleeve and a containment sleeve. The forming sleeve is made of a relatively soft, deformable material, whereas the containment sleeve is made of a relatively hard, nondeformable material. When the stem moves outwardly through the fastener body during setting of the fastener, the forming sleeve deforms to a fully set condition in overlying contact with the inner surface of the inner panel, forming a large bearing area that does not damage the composite material of the panels.

Abstract: An expandable rivet assembly for attaching objects, especially when using bone. The assembly includes a rivet and puller where the puller is pulled to expand the rivet. A stop is provided in the rivet to set an upper limit to the expansion of the rivet by the puller. This rivet is useful in material of varying density, and has slots on the side and a contoured surface to initiate bending at a desired location.