Abstract: A blind fastener comprising:a nut with an axial bore therethrough, a bolt extending through the nut with a sleeve encircling the bolt between the head of the bolt and the nut body, and a stop ring provided on a screw threaded portion of the bolt, the bolt having a break groove therein, between the nut body and the bolt head. As the bolt is advanced upwardly during installation, the stop ring abuts the terminal end of the nut body. This sudden resistance to further travel causes the screw threaded portion to fracture at the break groove thus providing a clean break at the break groove substantially filling a cavity in the nut head thereby increasing the strength of the installed fastener and eliminating any need for shaving off the broken-off screw threaded portion.

Abstract: The present invention provides a self-retracting, captive fastener assembly which allows the application of a controlled preload not requiring separate measurement during or after application. The assembly includes the use of a hold-out spring (31) which is isolated and fully retracts the assembly when the installed assembly is not engaged with a substructure. A housing (32) is provided for the hold-out spring (31) and contains the spring (31) when it is fully compressed. For the controlled preload, disc springs (40) are used. The shoulder (60) of the bolt shank portion (24) is staked so as to form protrusions (61,62,63,64) for captivating these mentioned elements upon the bolt. A removable, retaining element or stop-nut (50) is also provided for securement of the fastener to a first structure 65. The stop-nut (50) is constructed so that it must be seated against substructure (70) in order to achieve the controlled deflection of the disc springs (40) and thereby achieve the desired preload application.

Abstract: The invention is a flush-head rivet design 10 for joining two or more structural members together. One of the plates 52 incorporates a countersink 55 in the hole therethrough having an included angle 56 of between 99 to 101 degrees. In detail, the rivet 10 comprises a shank portion 12 having a minimum and maximum allowable shank diameter 18. The flush head 14 of the rivet includes a head diameter 23 before forming a land 24 on the edge thereof of between 1.642 times the minimum shank diameter 18 and 1.646 times the maximum shank diameter. The crown 26 has a height 25 between 0.074 time the minimum shank diameter 18 and 0.089 times the maximum shank diameter and a crown radius 27 between 4.334 times the minimum shank diameter 18 and 3.747 times the maximum shank diameter. The underhead surface 32 taper angle 34 is between 104 and 105 degrees. The land width 24 is between 0.007 times the minimum shank diameter 18 and 0.015 times the maximum shank diameter.

Abstract: An elongated strut which has a pair of inwardly depending flanges formed to receive and secure fittings inserted into the continuous slot of the strut anywhere along the length of the slot. The flanges define an interior cavity to receive and hold strut fittings and accessories.

Abstract: The rivet 10 comprises a shank portion 12 having a minimum and maximum shank diameter 18. The flush head 14 of the rivet includes a head diameter 23 before forming a land 24 on the edge thereof of between 1.875 times the minimum shank diameter 18 and 1.879 times the maximum shank diameter. The major crown 25 has a height 26 between 0.063 times the minimum shank diameter 18 and 0.078 times the maximum shank diameter and a major crown radius 27 between 2.974 times the minimum shank diameter 18 and 2.690 times the maximum shank diameter. The minor crown radius 30 is between 4.014 times the minimum shank diameter and 2.880 times the maximum shank diameter. The minor crown height 29 of between 0.021 times the minimum shank diameter and 0.031 times the maximum shank diameter. The underhead surface 32 taper angle 34 is between 102 and 103 degrees. The land 24 has a width 37 between 0.021 times the minimum shank diameter 18 and 0.012 times the maximum shank diameter.

Abstract: An internally threaded nut is provided which is to be screwed onto a hub bolt of a vehicle, e.g. an automobile, having, on its outer surface, near the forward or leading end thereof, a plurality of key protrusions oriented in the direction of the axis of the nut, and having also, on its outer surface and rearward of the key protrusions, a modified cylindrical section. The modified cylindrical section is not a true circle and is provided with a first diameter interspersed with several flattened, or larger diameter portions, as viewed in cross-section. The key protrusions are preferably trapezoidal in cross-section, are generally parallel to each other, and each has a specific configuration wherein one or more of the key projections differ in width from the others so as to form a particular combination, which can only be turned by a key element or key socket having matching trapezoidal cavities.

Abstract: The device has a screwthreaded collar 9 constituting a brake and trapped in a cavity 5 of a nut 2 with respect to which it is connected to rotate and axially movable in the cavity between an internally first position in which its screwthread 12 is in phase with the screwthread 3 of the nut and a second position in which the screwthreads are no longer in phase. The collar has splines 13 in its screwthread adapted to cooperate with splines in the screwthread 34 of a shaft 18 on which the nut is screwed so as to be immobilized in rotation on this shaft when the screwthreads of the collar 9 and the nut 2 are no longer in phase. For mounting the nut device, a tool is provided which comprises a hollow sleeve 20 defining a cavity adapted to receive the nut 2, an arrangement 29 for retaining the nut in a resilient manner and an arrangement 32 for maintaining the collar 9 in the first position at the inner end of the cavity 5 in opposition to the action of the second ring 15 when the nut is retained in the sleeve.

Abstract: A self-piercing adapted to be affixed to a metal panel. The nut includes a substantially rectangular body, with a pilot portion provided at the center of an upper surface of the body, which pilot portion is defined by a circumferential side wall which is slightly converged toward an upper surface of the body. The pilot portion includes a punching face disposed around the threaded bolt accommodating hole. Seat faces are provided at each corner of the body, with each seat face being defined toward the pilot portion by a wall spaced from the circumferential side wall of the pilot portion but facing the same. A top level of the seat faces is slightly lower than that of the punching face of the pilot portion. A recess is defined by a space lying between the pilot portion and the seat faces. The recess is opened to continue each side of the rectangular body between adjacent seat faces.

Abstract: An expansion dowel is made up of an expansion sleeve and an expansion body with a radially outer conically shaped surface. To expand the sleeve, the expansion body is pulled into the leading end of the sleeve. The leading end of the sleeve is connected to the expansion body by two elongated webs. A bridge section on the end of each web forms the connection to the expansion body and the bridge section is breakable under expansion conditions. The expansion dowel can be formed from a single blank of sheet metal in a forming operation.

Abstract: A fastening clip device forming a nut in the form of a resiliently deformable U section adapted to be fitted by its legs onto the edge of a panel, and having a member interposed between the legs so as to hold them positively apart prior to their fitting onto the edge of the panel and being movable relatively to the legs so as to be displaceable therebetween under the action of the panel as the legs are passed over the edge surfaces thereof. At the end of the fitting operation, one of the legs is released to allow the U section to resiliently close onto the edge of the panel.

Abstract: The invention is a protruding-head rivet for joining two or more structural elements together which, when driven, using all standard driving tools, provide a controlled expansion of the hole. The protruding-head rivet 10 has a shank 12 having a nominal diameter 18. The head diameter 24 is between 1.642 times the minimum shank diameter 18 and 1.706 times the maximum shank diameter. The head has a center spherical radius 26 of between 1.320 times the minimum shank diameter and 1.406 times the maximum shank diameter and a head outer spherical radius 30 of between 0.321 times the minimum shank diameter 18 and 0.353 times the maximum shank diameter. The underhead surface downward directed angle 36 is between 5 and 6 degrees. The head height 22 is between 0.455 times the minimum shank diameter 18 and 0.479 times the maximum shank diameter.The radius 38 between the protruding head and the shank is between 0.050 times the minimum shank diameter and 0.

Abstract: A fastener for securing two objects or structures together in a predetermined relationship. The fastener has a fastener body including a spacer which defines a predetermined distance between the two objects. A first locking element is attached to one side of the spacer and a second locking element is attached to the other side of the spacer. The fastener body is adapted to receive a plunger which when actuated will cause the locking elements to secure the first object and second object a predetermined distance apart.

Abstract: A non-rotating toggle bolt assembly which includes a collapsible toggle threadably received on the shank end of a bolt whose length is greater than the thickness of the wall for which the assembly is intended. When the toggle is collapsed, it assumes reduced dimensions to permit its passage through a hole drilled in the wall. On emerging from the hole at the shank end of the bolt, the toggle which is now displaced from the inner surface of the wall, resumes its normal dimensions. The assembly is provided with means which act to prevent rotation of the toggle when, in the course of installation, the operator turns the bolt to advance the toggle on the shank into engagement with the inner surface of the wall to fasten the assembly thereon.

Abstract: The disclosure concerns a fixing device for securing fasteners such as bolts into concrete or other similar material. The device comprises a sleeve member (2, 4) having a block portion (6) in which a nut (14) is set. The block portion (6) has a frusto-conical extension portion (16) joined by shearable links (18) to an intermediate portion (20) of the member which has an internal frusto-conical surface (22) complementing the extrusion portion (16) of the block portion. Tightening the bolt shears the links in the usual way. According to the present invention the device is moulded in two longitudinally divided portions (2) and (4), hinged together by a plastics hinge (10) adjacent the block portion (6). In the as-moulded conditions the portions (2, 4) are arranged end-to-end, but are hinged together to form the device ready for use.

Abstract: A bumper bar comprised of joined together stampings defining a closed box section has a cage attached inside the bumper bar and overlying an elongated opening in the bumper bar. The elongated opening has a major dimension which extends in the direction of desired adjusting movement of the bumper bar relative to the structural member upon which bumper bar is to be mounted. A bolt has a bolt head at least sufficiently smaller than the elongated opening to permit axial insertion of the bolt head through the elongated opening. The bolt head has a major dimension greater than the minor dimension of the elongated opening so that a quarter-turn rotation of the bolt subsequent to insertion through the elongated opening will align the major dimension of the head for engagement with the bumper bar to prevent removal of the bolt from the elongated opening.

Abstract: A lug attachment for detecting the removal of a wheel comprising a frangible shroud and an internally threaded member for attaching said shroud to the lug of a wheel mounting plate. The threaded member comprises a pair of split sleeve sections that laterally flex for engagement with the threads of a lug by an axial thrust. Thereafter, an axial thrust of said shroud clamps and secures the threaded member onto the lugs. Means formed on said shroud retains the threaded member in its axial position of attachment to a lug and prevents removal except by breakage.

Abstract: A self-threading polymeric fastener and blank therefor which can be used, for example, to support a wall plate over an electrical outlet or switch. The fastener blank comprises three portions, all integrally molded together, including a slotted head, a substantially cylindrical shank and a tapered tip. A helical thread is formed on the shank and tip by deforming the outer surfaces thereof without removing any significant amount of polymeric material therefrom. This is accomplished by rotating the tip and shank in a helically threaded bore, such as that provided in an outlet or switch. The polymeric fastener blank can be integrally molded with a polymeric wall plate to make their colors identical.

Abstract: A self-locking fastener having a bearing surface comprising a plurality of sets of serrations arranged to penetrate a workpiece such that, while a resistance to the loosening of the fastener from the workpiece is created, the marring of the workpiece surface is minimized. Use of the fastener is particularly advantageous if the workpiece consists of soft materials such as cast-aluminum or non-heat treated carbon steels. Each set of serration, when viewed as a profile, includes a downwardly inclined surface, a relatively deeper serration and a relatively shallower intermediate serration. The intermediate serration controls the depth of the penetration into a workpiece.

Abstract: An expansion anchor for mounting in a receiving socket in base material to enable an object to be clamped thereto. The anchor comprises a longitudinally split tubular sleeve (1) to which an internally threaded expansion body (6) is retained by means of lugs (10) thereof engaging slots (2,3,11) in the body of the sleeve (1). The slots (2,3,11) are provided to permit the tubular sleeve (1) to expand into gripping contact with the receiving socket as the expansion body (6) is drawn axially within the sleeve (1) by a threaded anchor rod (15). The sleeve (1) is provided with support means (8,12,13,14) for the anchor rod (15) when in engagement with the expansion body (6). The support means (12,13,14) constitute telescopic spacer elments between the head of the anchor rod (15) and the tubular sleeve (1) which allow free relative movement between the expansion body (6) and the head of the anchor rod (15) until the anchor is set in the receiving socket.

Abstract: A fastening assembly for use in attaching articles to soft materials such as gypsum based and light weight concrete roofing. The assembly includes an anchoring element which has a high thread and an axial bore in one end. The thread has an included angle of less than 45.degree. and terminates in a sharp edge at the free end of the anchoring element. A headed screw is driven into the bore and becomes fixed to the anchoring element. A flange is integrally molded and frangibly connected to the bored end of the anchoring element, and becomes a washer upon breaking away therefrom.