Abstract: The invention relates to a rivet element, in particular for attachment to components of fiber composite materials, having a rivet section which is formed at least regionally as a spike which tapers in the direction towards a tip and which can be dilated by means of a die button.

Abstract: A self-piercing rivet is disclosed. The self-piercing rivet integrally joins an upper plate member and a lower plate member overlapped with each other. The self-piercing rivet includes: a head portion; and a shank portion integrally connected to the head portion and provided with more than two slits.

Abstract: An anchor nail comprises a nail body being cut from a metal sheet and folded into shape. The nail body has an anchor strip substantial cut from a central portion of the nail body, whereby the nail body can be stricken to pierce the work pieces together with the anchor strip by striking the striking head of the nail body, so that the striking head can be in flush with an outer surface of the work pieces whereas the striking section of the anchor strip can extend out of the outer surface of the work pieces. Thereafter, the anchor strip can be stricken to move into the work pieces to be in flush with the striking head of the nail body so that the slightly curved section can be further curved so as to anchor the work pieces. The anchor nail can enhance the combining strength of the work pieces.

Abstract: A multi-shank nail has a first shank, a second shank and a washer; wherein both of the first shank and the second shank have an enlarged head at their top ends and a point at their lower ends. The first shank has a flat contact surface along its longitudinal length at an upper portion, and the second shank has a shape of a longitudinally cut nail such that the second shank is capable of corresponding to the contact surface on the first shank. The first shank has an inclined face and an extended portion in sequence below the contact surface. At least one of the first shank or second shank comprises a plurality of notches opposite the contact surface, and the notches make the first shank or second shank easier to bend.

Abstract: The Lower Half Portion of the shaft (32) of the Common Nail is cast, stamped, sliced, sawed, laser cut, etc., centrically-lengthwise into duplicate legs (34). Their chiseled tips (38) are at a distal terminus—as depth adjusted. They are angularly-forced outward and away from each other to ultimately embed the legs (34) finally in-place. An external driving force delivers the energy to embed the chisel tips (38) appropriately. Components of instant include, sequentially, a passive driving head (30), a nail shaft (32), a pair of legs (34), and a pair of chisel tips (38). Appendage-spreading, structural resistance to extraction is the essence of this instant.

Abstract: A harpoon nail having two or more sets of teeth on opposite sides of fingers that deform while penetrating the framing members. The teeth engage with a bottom surface to fasten the framing members together. A piercing nail having sets of teeth on two edges penetrates through framing members and the teeth engage with a bottom surface to fasten the framing members together. A piercing nail with a spring member that deforms as the nail penetrates through framing members engages with a bottom surface to fasten the framing members together. A self-locking nail having two members that move relative to one another when penetrating through framing members fastens the framing members together.

Abstract: A river body (40) is formed with cutting teeth (68) in a forward edge (66) of the rivet body. A mandrel (96) is formed at a forward end with an enlarged head (104) having a drill point (60) thereon. A plurality of the rivet bodies (40) are stacked on the mandrel (96), with the drill point (60). The rivet body (40a) is rotated and, through rotative coupling, the mandrel (96) is also rotated. The rotating drill point (60) forms pilot holes I workpieces (186) and (188), and the rotating cutting teeth (68) enlarge the pilot holes to form holes (192) and (194), respectively, for receipt of a cylindrical portion (42) of the lead rivet body (40a).

Abstract: A nail structure comprises a wall nail casing a center of the wall nail casing being formed with a tapered central axial hole which is reduced toward a distal end thereof; two sides of the distal end of the wall nail casing being formed with respective slots; and one end of the central axial hole being an through opening and another end thereof being an inlet; a hammer nail capable of inserting into the central axial hole; and a plurality of semi-round enhancing ribs are on an inner surface of the central axial hole of the wall nail casing; a front end of each enhancing rib being reduced toward one inlet of the central axial hole for receiving the hammer nail easily.

Abstract: A harpoon nail having two or more sets of teeth on opposite sides of fingers that deform while penetrating the framing members. The teeth engage with a bottom surface to fasten the framing members together. A piercing nail having sets of teeth on two edges penetrates through framing members and the teeth engage with a bottom surface to fasten the framing members together. A piercing nail with a spring member that deforms as the nail penetrates through framing members engages with a bottom surface to fasten the framing members together. A self-locking nail having two members that move relative to one another when penetrating through framing members fastens the framing members together.

Abstract: A partially-hollow rivet (1), for joining aluminum sheets (3) and (7) by using the self-piercing technique, is made of light metal such as aluminum or an aluminum alloy, and the front (2) of the rivet base has a surface with a blunt shape.

Abstract: An anchor nail for use with gypsum and other cementitious or composite materials used in roofing which includes a tapered tubular shank having openings therein through which ends of an insert wire staple are deflected to provide an anchoring for the nail within the material and wherein the legs of the staple are formed so as to prevent fastener withdrawal.

Abstract: The invention features an improved flush installation multi-part interlocking nail fastening system which eliminates loosening of flooring members, rubbing, or relative movement, thereby eliminating squeaks and noises. A master nail with modified head and shank portions accepts insertion of two smaller nails of soft composition which, when driven into a pair of internal longitudinal bores, these small nails exit the master nail to form opposing arcs, pulling abutting floor members into tight abutting engagement.

Abstract: An improved machine screw for engaging a correspondingly threaded aperture, comprising a threaded shank having a proximal portion and a distal portion. A head adapted to be rotated may be formed on a shank proximal end opposite the shank distal portion, such that the shank extends axially therefrom. The shank is deformable from a first position to a second position, for either (1) minimizing the contacting surface area between the shank and said aperture, and thereby allowing the machine screw to be easily insertable into said aperture, or (2) maximizing the contacting surface area between the shank and said aperture after the shank has been fully inserted into said aperture, and thereby making the hold between the screw and said aperture more secure. Such deformation of the screw occurs during its insertion into said aperture. It has been found that this deformation prevents screws of the present invention from seating improperly within threads of said aperture.

Abstract: A nail comprises a shank having an expansion portion with two curved expansion limbs defining a free space therebetween, a first straight shank portion and a second straight shank portion located correspondingly before and after the expansion region, the free space being formed as a longitudinal notch starting from the first straight shank portion and extending to the forward end, the notch having a notch base rising in direction toward the forward nail end, and a wedge arranged in the longitudinal notch and bearing against the notch base, the wedge having an upper edge slightly projecting beyond the shank and being displaceable in direction toward and along the rising notch base.

Abstract: A blind rivet has a first part comprised of a central core having depending circumferentially spaced legs spaced radially from the axis of the first part and radially projecting, circumferentially spaced flanges at an upper end forming a head for the first part. The second rivet part includes a bulbous lower end having an upstanding central core with radially outwardly projecting legs. The legs of the second part are spaced circumferentially from one another and, above the core, are spaced radially from the axis. Upon inserting the first part into the second part, cam follower surfaces on the distal ends of the legs of the first part engage and are cammed outwardly by cam surfaces in curved chaseways between the legs of the second part to set the rivet and grip the undersurface of the elements being connected. The flanges of the first part are received in the spaces between the flanges of the second part and engage the outer surface of the outer element to be connected.

Abstract: Long and short legs have heads and pointed tips, respectively. They are joined together near their tips by welding. An upper portion above the welded portion of the long leg is formed with a cut extending obliquely upwards toward the short leg so that a thin breakable portion is formed in the long leg between the end of the cut and the contact surface with the short leg. A washer for clamping the legs above the cut is provided. When the nail is driven, the legs will not spread until the head of the short leg abuts the washer. When the head abuts the washer, the long leg slides outwards and spreads apart from the short leg near the cut. The breakable portion will thus get broken and the nail will spread.

Abstract: A fastener-plate assembly for use in anchoring covering sheets to a roof deck has a pre-assembled configuration. The assembled configuration is maintained by projections on an upper portion of the fastener shank. The projections engage against a received retainer plate to retain the plate to the shank of the fastener.

Abstract: A vibration-resistant two-member fastening device characterized by quick lock and release. The first of the two members has an engagement edge which is adaptable to apply pressure on the second member. The second member has either a recessed surface or a threadline, the diameter of which decreases from a front point away from the head towards a back point close to the head.

Abstract: Disclosed is an anchor assembly especially for use in a plastic wall-panel which comprises a plug formed of a forward section comprising a tapering plastic board-piercing part and an integral ram head, and of a hollow cylindrical section pivotably connected to the forward section. The assembly may further comprise a spike capable of being driven into the hollow cylindrical section, the spike being provided with a cylindrical portion having serrations on its outer surface for bitting into the cylindrical section or ram head and thus being secured to this section or head. The spike is provided with a hammer portion having a length sufficient at least to engage the ram head, as it is driven into the plug, and to cause pivotal of the forward section of the plug and abutment thereof against the concealed side of the plaster-wall panel.

Abstract: The wall plug anchor assembly is applicable to heavy-duty and reinforced concrete and the like, of a construction component such as a wall and the like environments. The wall plug anchor assembly includes a metallic sleeve having a head of a respectively greater diameter than the sleeve body, of a metallic material, such as a plastically deformable steel of German steel quality ST 34 or ST 37, and wedge means for permanently modifying the sleeve at a location remote from the crown end thereof, particularly to permanently modify the transverse cross-sectional dimension of the sleeve, for example to enlarge the diameter by plastic deformation of the sleeve walls.

Abstract: Carpet engaging support devices for anchoring tippable or slidable objects in desired position on a carpeted floor, the devices having one or more sharpened prongs engagable through and under the carpet, with the prongs being arranged to hold the devices on the carpet against unwanted removal. Spring clips, detent means and magnetic means are provided for releasably securing the devices to the objects to be anchored. In one aspect of the invention, the devices are particularly suited for anchoring a receptacle balanced on top of a carpeted floor hump in an automobile, while in other aspects the devices are particularly suited for anchoring mats, throw rugs and the like.

Abstract: A fixing element which can be keyed in a hole in a solid base has a tie bolt and a key which is movably mounted on a key surface slanting relative to the central longitudinal axis of the tie bolt. There is furthermore provided a power store which is supported on the one hand against an abutment of the tie bolt, and, on the other hand exerts a pressure force onto the key. Provided also is a ring which holds together the tie bolt and the key. In order to ensure with such a fixing element a simple construction and simple possibilities of assembly for a short distance from the base, the power store applies constantly against the key, the inelastic ring in a position in the region of the key surface of the tie bolt clamps the tie bolt and the key against each other under the pressure force of the power store, and the ring in a position behind the key surface holds the key freely movable in longitudinal direction relative to the tie bolt.

Abstract: A fastening unit with nail anchorage, is provided including a cylindrical body with a head and a support leg. The body includes a surface parallel to its axis for guiding an anchorage nail. The leg includes an expansion surface, slanted in one direction with respect to the axis of the body, and a surface for maintaining the nail under pressure, bent back in the other direction towards the axis of the body. The expansion surface extends between the guide surface and the pressure maintenance surface.

Abstract: A self crimping connection for inner and outer members and the method of making the same includes providing the inner member with stepped cylindrical exterior walls defining an outboard wall of reduced diameter relative to an inboard wall with an annular groove in the outboard wall; providing the outer member with a stepped bore defining an internal outboard wall and an inboard wall to slidably receive the outboard and inboard walls, respectively, of the inner member, with an annular groove in the outboard wall of the outer member; a first bushing encircling the outboard wall of the inner member and a second bushing encircling the outboard wall of the outer member, with each of the first and second bushings having a body portion and a crimp collar portion, the arrangement being such that as the inner member and first bushing are axially pressed into the outer member and its associate second bushing, the crimp collar portion of the first bushing is crimped into locking engagement into the annular groove in the

Abstract: A mounting assembly for mounting an object to a plasterboard wall includes a molded plastic bracket formed with a hollow barrel at one end and a clip at the other end to support an object. An anchor having a pointed stem portion and a head at the other end, is inserted through the hollow barrel of the bracket and then drive into the plasterboard. The anchor includes an axial bore extending from the head end along part of the stem portion and a through slot extends from the axial bore toward the pointed end thereby defining two opposed stem sections. Inwardly extending projections on each stem section cooperate with a nail to expand the two opposed stem sections and to snap those sections apart adjacent the pointed end. Mating keyways formed on the anchor keys formed on the hollow barrel orient the stem sections one vertically above the other when the anchor is in place within the wall.

Abstract: A fastener for securing two pieces of roofing material includes an elongated member having a pointed tip end and a flange like head end. The elongated member includes an internal channel that extends substantially the entire length of the member and terminates in an opening in the head and a double faced ramp at the tip. A plunger and flexible barb are disposed for longitudinal movement within the channel and the elongated member contains a pair of sidewall openings located proximate the ramp and communicating with the channel. The openings are provided with barb directing surfaces that engage the barb and cause it to move in a direction substantially perpendicular to the longitudinal axis of the channel as the barb exits the opening. The opening is also provided with a barb engaging surface that produces a frictional drag on the barb causing it to curl as it exits the opening.

Abstract: A sheet metal nail of the type for securing built-up roofing membranes used to waterproof cementitious roof decks has a head and a hollow shank portion integral therewith and designed to resist withdrawal of the nail from the deck in a conventional manner, the head however being of larger diameter than the head of the conventional nail used for this purpose and further having a design which allows the fluid asphalt conventionally poured over the nail during construction of the roofing membrane to bond the portion of the membrane beneath the head and thereby increase the wind uplift resistance of the roofing membrane. The nail is preferably of "one piece" construction formed from a sheet metal blank.

Abstract: A fastener for securing built-up roofing membranes used to waterproof cementitious roof decks combines the conventional nail used for this purpose having a head and a shank portion designed to resist withdrawal of the fastener from the deck, with a non-integral tab penetrated by the shank of the nail and of larger diameter than the nail head, the tab having a design which allows the fluid asphalt conventionally poured over the nail during construction of the roofing membrane to bond the portion of the membrane beneath the tab and thereby increase the wind uplift resistance of the covering material. Removability of the tab allows its detachment in applications where increased uplift resistance is unnecessary.

Abstract: A drive fastener designed to be hammered into penetrable material. One end of the drive fastener is split. The opposite end of the drive fastener contains threads. A pair of nuts are threaded together on the threaded end of the drive fastener to receive the impact of a hammering device for driving the fastener into penetrable material. When being driven, the split end spreads while penetrating to secure the fastener in place. The nuts are then removed and a single nut may be used to secure an object to the set fastener.

Abstract: An improved rail fastening assembly composed of a new rail spike and a contact plate member for maintaining a rail in the preset contact with a cross-tie. The assembly of the present invention maintains rail gauge in spite of long and heavy trains.

Abstract: A clip for attaching together planar wooden or like members comprising a one-piece sheet metal element having a flat base adapted to be seated on one of the members and provided along one edge with an outwardly open socket-like formation above a surface of its base for abutting engagement with the other of the members, the base having a bent nail portion formed by material displaced out of said base to leave an opening in the base and comprising a shank portion extending at an acute angle from an edge of said opening away from the base surface and the opening and a tip portion extending from a transverse bend toward the base opening and being adapted to angularly penetrate the one member, the included angle between the shank and tip portions being an acute angle, and the tip portion being bifurcated with the free ends of the bifurcations having oppositely lateraly outwardly inclined edges.

Abstract: The disclosure relates to a fastening device for driving into building material, the device consisting of one or more elongate V profiles whose shanks, in the vicinity of the forward, penetrating end of the profiles are outwardly relieved or bevelled such that building material, on driving of the device into the material, is trapped between the shanks and forces them apart. A tip at the forward end of the profile is designed such that, on being driven in, it moves in the driving-in direction.