Abstract: The invention relates to a drill with a drilling shank, particularly with a screw shank comprising a self-tapping thread, and with a fork-shaped hard-material plate-shaped drilling tip disposed opposite the driving end of the shank, said drilling tip being inserted into a holder in the shank, said holder comprising two grooves, disposed diametrically with respect to each other in the shank, for accommodating prongs of the drilling tip. The shank terminates bluntly in an essentially radial end surface from which the grooves extend towards the driving end in such a manner that exclusively the prongs of the drilling tip, pressed axially into the grooves, both hold the drilling tip self-lockingly on the shank and also transmit the torque from the shank to the drilling tip.

Abstract: An expansion dowel including an expansion sleeve one end portion (4) of which receives a load and an opposite portion of which has an expansion region divided into expansion tabs by a plurality of longitudinal slots (7) extending toward a leading end of the expansion sleeve (2), with the expansion tabs (6) being connected with the expansion sleeve (2) by a first ductile joint (5) and having an annular collar (8) interrupted by the longitudinal slots (7), and an expansion member (13) displaceable in an axial through-bore (3) of the expansion sleeve (2) from an initial position to an end position upon expansion of the expansion region of the expansion sleeve (2), with the expansion tabs (6) projecting beyond the annular collar (8) and integrally connected with a distance segment (10) of the expansion sleeve (2), which distance segment collapses radially inward upon expansion of the expansion tabs.

Abstract: An alignment tolerant fastening system for interconnecting first and second members having first and second bores therethrough, respectively, is disclosed. The fastening system may include a fastening member having a shank portion which is receivable within the bores of the first and second members, a nut member for engaging at least a distal portion of the fastener shank portion proximate the second member, and first and second washers, at least one of which includes a plurality of serrations, positionable within the first bore of the first member, about the shank portion of the fastener. More specifically, for purposes of accommodating a misalignment between the first and second bores, the inner wall of the first washer is slidably engagable with the fastener shank portion and the outer wall of the second washer is slidably engagable or interconnectable with the first bore wall which defines the first bore of the first member.

Abstract: A new Double-Ended Nail Driving System for securing two boards together without scarring a surface of the boards by securing a conventional fastener into the surface of the boards. The inventive device includes a double-ended nail having a center flange, an elongated cylinder having an elongated cavity projecting into an end for removably receiving an end of the double-ended nail, and a lower flange attached to the end for engaging the center flange of the double-ended nail. The lower flange engages the center flange thereby allowing the user to tap upon an opposite end with a conventional hammer thereby penetrating the double-ended nail into the board within dulling a sharpened end of the double-ended nail. The present invention further reduces the amount of scarring normally associated with conventional fasteners securing the two boards together.

Abstract: A novel clinch-type fastener member is engaged through first and second workpieces to form a mechanically locked joint which is highly resistant to vibrational loosening. The fastener member has a first portion and a second portion defined by a shank portion which extends therefrom. The first portion has a protuberance, formed from a ring, thereon which extends outwardly therefrom. The shank portion has a projection, formed from a ring, spaced a predetermined distance from the first portion to define a retaining groove. To engage the fastener member with the workpieces, the fastener member is rotated into engagement therewith. The protuberance on the first portion engages a top surface of the first workpiece and rotational and compressive forces are applied to the fastener member thereby causing the protuberance to deform the first workpiece material to cause the material to flow into the retaining groove provided of the fastener member.

Abstract: A staple for maintaining netting in an installed position on a ground surface, which netting is used to enhance the growing of turf or sod. The staple has a pointed end and a medial portion extending to a distant end. The distant end has a head portion which is of a width that is greater than the width of the pointed end and the medial portion and is likewise wider that the smallest distance defining the opening in the netting. A method and apparatus for installing the staple is also disclosed.

Abstract: A one-piece high-security cable type seal-lock having a locking body (10) consisting of: A length of multi-stranded cable (50) having one cable end (51) permanently attached to locking body (10) within a through hole identified as fixed cable hole (11). A longitudinal cylindrical through hole (14) running approximately parallel to fixed cable hole (11) and having a centrally located annular recessed groove, thereby creating center expansion cavity (25). A locking pin (40) is held in place within locking body (10) and positioned approximately perpendicular to, and centrally located above, free cable end (52). When installed, locking pin (40) is forcibly pushed down until it pierces free cable end (52) thereby staking the cable in place and simultaneously creating cable bulge (53). The enlarged diameter of cable bulge (53) within center expansion cavity (25) is unable to be removed from locking body (10) via the lessor diameters of adjacent first guide hole (20) or second guide hole (22).

Abstract: A self contained captive bolt assembly which is riveted onto a plate for purposes of mounting the plate onto structure. The assembly forms a high strength joint with the use of common close tolerance holes through the plates being joined and is designed to mate with a common plate nut. A receptacle houses the assembly and traps the bolt between the bolt head and a retainer attached to the bolt. The captive bolt is provided with a spring between the retainer and an end cap which acts to hold the bolt in a retracted position prior to fastening.

Abstract: A threaded self-locking fastener, having a hollow body open at both ends and an elongated central through bore with a slot extending the length of the hollow body.Version 1 has sharp edges on the slot that dig into the bore of the work piece to prevent rotation. The fastener is used in conjunction with an internal driver. The driver located in the bore of the fastener engages detents to produce rotary drive motion. The driver also has a means of manipulating the first and second edges to facilitate assembly and disassembly.Version 2 has curved or chamfered edges in the slot and inward facing lobes also used in association with a driver. Rotation of the driver against the lobes causes the tubular fastener to be reduced in diameter against spring tension thereby allowing the fastener to freely rotate in the threaded bore of the work piece. By releasing the driver, the fastener expands and self locks in the threaded bore.

Abstract: An improved securing structure for air valves including a nut being a tapered hexagonal rod structure for use with suitable wrenches. The nut has a projecting configuration to prevent the problem with the prior art in which the nut cannot be properly tightened or loosened when the nut is positioned too near the rim of the tire.

Abstract: A self-tapping, blind setting rivet assembly to secure two or more work pieces together and suitable for power or hand tool application. The rivet assembly comprises a rivet body having a hollow tubular sleeve and 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 causes the tapered shoulder section of the screw tip to compress and deform the rivet sleeve which sets the rivet.

Abstract: A steel fastener has an elongate shank, an enlarged head formed at one end of the shank, and a generally pointed tip formed at the other end of the shank. A grooved portion of the shank is formed with helical grooves defining helical ribs and with annular grooves defining annular rings. The shank has a cylindrical portion between the grooved portion and the tip and a cylindrical portion between the grooved portion and the head. Each of the annular grooves has a root where deepest and each of the annular rings has a crest where largest. The roots define an imaginary cone diverging toward the tip. The crests define an imaginary cone converging toward the tip. The shank has an exterior surface coated with a polymeric coating, which is formed from an aqueous composition containing a water-based acrylic resin and a water-based polyurethane resin. A zinc layer and a chromate conversion layer are provided between the polymeric coating and the exterior surface of the shank.

Abstract: The new fastener has a shank which is resiliently compressible along an axis perpendicular to the shank push-in axis and has teeth protruding from the shank along the axis of resilient compressibility. The teeth are inclined in the push-in direction and in the pull-out direction. When the shank is pushed into an existing screw hole, then inclines of teeth just past the far side of the screw hole are increased to resist motion in the pull-out direction so that the shank is secured in the screw hole and so that the fastener can be pulled-out without damage. The shank can be integrally part of a first structure being fastened to a second structure.

Abstract: An adjustable expansion pivot rivet for connecting a movable member to a fixed member having a cylindrical exterior surface, a hollow interior portion with a terminating portion and a solid interior portion such that the hollow interior portion extends through the fixed member and the terminating portion and solid interior portion extends into the movable member, the hollow interior portion expanding in the hole of the fixed member to fill therein, and the termination portion and solid interior portion defining a gap forming a reservoir for lubricant in the movable member.

Abstract: A threaded fastener has a standard part with a standard thread form characterized by thread walls with a standard included angle, and a modified part complementary to the standard part having a modified thread form characterized by thread walls which are symmetrically inclined with a modified included angle that is different from the standard included angle of the standard part's thread walls, such that the threads of one part make pre-loaded edge contact with the thread walls of the other part. The thread form of the modified part can have an included angle that is greater, less, or compound as compared to the included angle of the standard part. The standard part may be a bolt and the modified part a nut, or vice versa.

Abstract: A child-proof door latch including a selector switch accessable from the door's exterior for enabling or disabling the functioning of a cable-driven latch of the type where a sheath about the cable pushes on the latches trigger to actuate the latchbolt. The selector switch includes a slot which controls the anchoring or movement of the end of the cable which, in turn, permits or prevents the tensioning of the cable sufficiently to straighten the sheath thereabout for actuating the trigger.

Abstract: A tool having a profile for the forming or shaping of a complementary thread in and/or on a fastener which can be utilized with advantage as a bone screw or another osteosynthetic force transmitting member, instrument or accessory. The thread which is formed by the profile of the tool has two flanks each having a first section adjacent the crest and a second section adjacent the root of the thread. The second sections jointly include or consist of at least four concave portions having different radii of curvature and gradually merging into each other. The first sections make angles of less than 40.degree. with a plane which is normal to the longitudinal axis of the thread. The first and second sections of each flank are separated from each other by an imaginary cylinder having a diameter which matches the pitch diameter of the thread and a longitudinal axis which coincides with or is at least close to the longitudinal axis of the thread.

Abstract: An orbital threaded fastener assembly includes an orbital nut or bolt and a split thread ring. Each of the nut or bolt and the thread ring has formed thereon a series of alternating, coaxial, circumferential grooves and teeth sized to mateably engage each other. These grooves and teeth can be formed on either the internal surface of the nut and the external surface of the ring or the external surface of the bolt and the internal surface of the ring. In use, the diameter of the ring is resiliently expanded or contracted to permit it to be disposed at a desired axial position along the nut or bolt to engage each other, thereby preventing relative axial movement of the parts while accomodating relative rotational movement thereof. The surface of the ring opposite that carrying the grooves and teeth is threaded to permit threaded coupling to an associated threaded component.

Abstract: An anchor rod for use as a composite anchor is secured in a receiving borehole by one of a hardenable or curable organic and inorganic mortar mass. The anchor rod has a means (3) at a trailing end region (2) for engaging a load. The anchor rod has an anchoring region (4) insertable into the receiving borehole and has a thread-like profiling (5) for interaction with the mortar mass injected into the receiving borehole. The thread-like profiling is a coarse screw thread (5) and has a thread pitch (s) which reduces in the axial direction from the leading end toward the trailing end of the anchor rod (1).

Abstract: A lock nut assembly for vehicle axles includes a pair of cooperative annular nut members hang threads formed on the inner peripheral surfaces compliment--and cooperating with the externally threaded shank of axle spindle. The nut members are coupled together threaded fastener means and spaced axially from one another. The threaded fasteners are to be tightened when the nut members are tightened on the threaded axle spindle to form a high stressed clamping force between the threads of the nut members and the threads of the axle spindle.