Abstract: A metal fastener, suitable for use in wood construction and coated with a polymeric residue produced by removing water from an aqueous dispersion of a film-forming, thermoplastic, predominately aliphatic polyurethane resin, thereby to reduce penetration force, increase withdrawal force, and protect against corrosion. Before the polyurethane coating is applied, a zinc layer is applied so as to coat the fastener, and a chromate conversion layer is applied so as to coat the zinc layer.

Abstract: An insulated blind rivet mounting arrangement in an aperture in a wall including a blind rivet having a tubular rivet member and a actuating rod that is disposed within the tubular member and is adapted for axial withdrawal therefrom; an insulating sheath made of non-electrically conductive material positioned over said tubular rivet member; and said blind rivet actuating rod being removable from said tubular rivet member for expanding the tubular rivet member and insulating sheath into tight interfitting relation with each other within the wall aperture. Alternative embodiments are disclosed in which one or more coaxially disposed tubular flanged members are utilized to complete the mounting, with the insulating sheath being effective to thermally and electrically insulate the tubular rivet member. The insulating sheath, which preferably is made of a resilient plastic material, also is effective for creating a substantially vibration-free mounting within the wall aperture.

Abstract: A structure for fastening a resin member to a base member typically composed of a metallic material with a threaded bolt passed through holes provided in the resin member and the base member, comprising a metallic sleeve through which the bolt is passed fitted in the hole of the resin member, the length of the sleeve being slightly shorter than that of the hole of the resin member. Therefore, when the threaded bolt is tightened, the inner circumferential wall of the hole of the resin member collapses upon a longitudinal end of the sleeve so that the threaded bolt may be securely tightened without damaging the resin member because the metallic sleeve bears a substantial amount of the stress produced by the fastening of the threaded bolt.

Abstract: Thermoplastic polymer locking elements are formed on threaded fasteners to provide a range of self-locking torque characteristics. The thermoplastic resins are of the type that crystallize during cooling from the molten state.The crystallizable polymers are preferably applied in film form to preheated threaded fasteners. By correlation of the preheat temperature, the length of time during which the molten polymer is allowed to melt and flow onto the thread surfaces, and the rate of cooling of the assembly, the geometry of the locking element and the degree of crystallinity of the polymer are controlled.

Abstract: A protective cap for fastener heads includes a preformed member formed of a naturally tacky compound of unvulcanized butyl rubber, a reinforcing layer of a non-woven polyester fabric, and a silicone-coated polyethylene release liner. The preformed member has a dome-shaped central portion and a surrounding generally flat annular flange. The reinforcing layer of the polyester fabric is disposed over a top surface of the preformed member to form a homogeneous cap construction, and the release liner covers the tacky bottom surface of the preformed member to prevent the cap from adhering to surfaces until ready for use. A plurality of the protective caps are formed in a manipulatable sheet unit and are maintained thereon by the natural tackiness of the unvulcanized butyl rubber compound.

Abstract: An improved closet bolt has a generally oval head, a shank including a threaded fastening portion extending from the head and generally concentric with respect thereto, and anti-turn ears or protrusions extending radially outwardly from a portion of the shank between the threaded shank portion and the head, the threaded portion adjacent the anti-turn ears having on opposite sides thereof a plurality of sawtooth or ramp members, the ramps sloping toward the bolt head, and wherein the bolt is constructed of a suitable high strength plastic material. Methods for using the improved closet bolt result in quick and efficient toilet installation, removal and repair.

Abstract: The invention is a flush head fastener for joining two or more structural elements together. The structural elements have a fastener hole therein with one of the structural elements being countersunk to accommodate the head of the fastener. The fastener includes head and shank portions and a layer of material joined to the top of the head of the fastener which can readily be deformed to fill any gaps between the head and the countersink. Thereafter, the excess material can be removed leaving an aerodynamically smooth surface. The surface also will have no electrical discontinuities. The procedure for installing the fastener includes the steps of (1) providing two or more structural elements having a countersunk fastener hole therein (2) thereafter the fastener is installed in the hole (3) the layer of material is deformed so as to fill any gaps between the head of the fastener and the countersink, and (4) thereafter, excess material is removed leaving a smooth external surface.

Abstract: A method of masking the threaded portion of a threaded fastener part to prevent adhesion of coatings comprising the steps of applying a film of a heat activated foaming polymeric material to the threaded portion of a threaded part prior to exposing the threads to a coating and heating the foaming material subsequent to the application of a coating thereto. The foaming material comprises a plastisol, preferably including a vinyl compound, which most preferably is polyvinyl chloride. The foaming material further comprises a blowing agent, preferably azodicarbonamide.

Abstract: A synthetic resin rivet comprises a rivet body having a hollow cylindrical portion and an integral flange portion extending radially outwardly from the upper end of the cylindrical portion and a pin for radially expanding the cylindrical portion of the rivet body when inserted thereinto. The rivet body has a double-layer structure constituted by two different synthetic resins, one relatively hard and the other relatively soft. At least an outer layer of the cylindrical portion and a cap layer closing an end opening of the cylindrical portion is fabricated from the soft synthetic resin so as to provide reliably effective annular sealing defined between the cylindrical portion of the rivet and the interior peripheral surfaces of the holes defined within panels within which the rivet is to be disposed.

Abstract: There is disclosed a torque limiting fastener system for forged or pressed metal nuts. The stamped metal fasteners have a central, cylindrical sleeve, an annular ledge which is dependent from one end of the sleeve, and a surrounding skirt, generally with hexagonal flats, which forms an annular well about the cylindrical sleeve. The torque limiting characteristic is imparted to these fasteners by a drive member which is of approximately the same dimensions as the stamped or pressed metal fastener and which has a plurality of prongs which are received in apertures or recesses in the stamped fastener. The apertures can open into the annular well about the central sleeve of the fastener or can be placed in an annular flat base which is formed on some of the stamped metal fasteners. The drive member is formed of a suitable plastic material having a precisely controlled shear strength.

Abstract: A corrosion resistant coating and process comprises the following layers applied in sequence over a ferrous metal substrate: a micro-throwing nickel-zinc alloy plating; an optional galvanically protective zinc metal plating; a zinc-nickel alloy plating containing 5 to 30 weight percent nickel; and an organic coating such as paint. The coating is preferably used with steel drill screw fasteners wherein it also reduces installation torque and drill time.

Abstract: A fastener, and a process and apparatus for coating fasteners, in which a resin type material is applied to the fastener is disclosed. A stream of resin type material is directed to each fastener and the threads of each of the fasteners, the threads may be covered over an arcuate variable length including complete 360.degree. coverage. The resin type material applied may be a masking material, a lubricating material and/or an insulating material enabling an accurate and consistent torque-tension characteristic to be maintained during coupling of the fastener in a variety of post-processing environments. Furthermore, the resin type material applied to the fastener is substantially resistant to the deposition of corrosion resistant or preventative materials.

Abstract: A metal threaded fastener is disclosed for use in outdoor or other environments where fastener rust or corrosion are to be discouraged. The fastener includes a metal head adapted for engagement with a torque wrench or the like. The head is covered by a polypropylene jacket. Raised metal protuberances below from a bottom clamping surface of the head. In one embodiment, these protuberances extend at least partly through the polypropylene jacket, but the thin covering layer of polypropylene is displaced from the protuberances during bolt installation. These protuberances provide metal-to-metal contact with a workpiece, and consequently encourage maintenance of a correct axial clamping pressure without over-torquing the mating nut.

Abstract: A fastener member and method of formation are provided wherein a bolt and nut are formed from a block of resin-impregnated fibers woven in a first, second and third plane each perpendicular to the other wherein the fibers in the first plane extend continuously and longitudinally through the fastener member and the fibers in the second and third plane extend to form the peaks and valleys of the helical thread.

Abstract: A process for making self-drilling, screw fasteners having improved corrosion resistance. The process comprises applying a frangible radiation curable plastic coating over the drill tip corrosion prior to the deposition of a heavy resistant plating on the remainder of the screw. The disclosure is further directed to the product of the process.

Abstract: A composite rivet comprises a preformed head portion, a shear portion, an integral mandrel extending from said shear portion having an annular recess therein, a deformable plastic locking ring radially aligned with and filling the recess in said mandrel, and a collar telescoped about and radially aligned with said locking ring for controlling deformation thereof.

Abstract: A holddown to be used in conjunction with a headed fastener, a roofing system and a method utilizing the same. The holddown comprises a disc-shaped spring and a body encasing the spring. The fastener is interpositionable within a hole in the body of the holddown and displacement of the fastener applies a compressive force to the holddown. The spring is deformable from an unbiased position to a biased postion by the compressive force. The body is deformable from an unconstrained shape to a constrained shape by the deformation of the spring. The holddown is usable in conjunction with both the fastener and pliant filler to affix roofing material in a watertight relationship to a roof structure and to maintain the same in position against the forces applied by the wind.

Abstract: An encapsulated metal bolt comprises a head portion having an encapsulating cap thereon with a plurality of conductive fibers therein electrically isolated from the head but electrically exposed to the surface of a complementary aperture.

Abstract: A nailing strip for use in a power-operating nailing hammer, and having a plurality of nails arranged in a strip, a junction wire fastened to the shank of each nail in the strip, and a sheath covering the wire.

Abstract: A method for treating a nail in order to increase the withdrawal load required to withdraw the nail from a piece of timber into which it has been driven. In accordance with the invention the nail is coated with a suspension containing a chelating agent so selected that, upon contact with lignin present in the timber the nail is bonded to the lignin via a chelate bond. The chelating agent comprises a modified polysaccharide in aqueous solution and is provided with a protective colloid to which the chelating agent has a lower affinity than to the lignin present in the timber. The suspension also includes a suspended polymeric thermoplastic resin to which the chelating agent has a lower affinity than to the protective colloid.

Abstract: An adhesive anchor comprises a tie rod 1 having a thread casing 3, a pressure nut 5 and a pressure plate 7. The thread casing is saw tooth shaped with steep flanks 33 facing the tie rod free end and flat flanks 31 facing away from it. The turns of the thread casing are wedged between the thread body 11 of the nut and the tie rod, considerably improving the transfer of forces between the casing and the rod. The anchor is especially suitable for the securing of gallery walls in coal mines.

Abstract: A composition for rust prevention of metals consisting essentially of (a) an organic silicon compound having an aminoalkyl group and at least one alkoxy group and (b) a compound having at least one oxirane ring. Said composition exhibits its effects particularly when applied on threaded metal elements.

Abstract: To give an otherwise fastened wood or wood-like structure the appearance of a bolted construction, first and second wood or wood-like structural members are provided. Each member has first and second sides with the first member second side being positioned adjacent the second member first side. The two members are thereupon fastened together. A simulated bolt head is then secured to the first member first side with a simulated bolt end being secured to the second member second side so that the simulated bolt head lines up with the simulated bolt end giving the appearance of a bolt passing through the structure. A simulated bolt for use in giving the appearance of a bolted construction in a wood or wood-like structure includes a fastener, having a shank and a tip, as well as a simulated bolt portion. The fastener and the simulated bolt portion are secured to each other.

Abstract: In a portable radio device comprising a housing (20), a printed wiring board (11) encased in the housing, and a machine screw (50) for fastening the board to the housing through a tapped and a via hole (17) and (25), the machine screw has head and threaded portions (51) and (52) and an insulating cap (55) of a cylindrical shape covering the head portion and having at least one groove. Preferably, a pair of the grooves (56, 57) are formed parallel to an axis of the machine screw. The head portion may be circular or polygonal in cross section and have at least one screw slot. At least one groove may be formed on an upper end surface of the insulating cap. Alternatively, the machine screw may wholly be made of an insulating material.

Abstract: A corrosion resistant angled head fastener is disclosed for use with at least two non-metallic panels. The panels defining a bore and a counterbore with the counterbore and a portion of the bore being in one panel and the bore extending through another panel. The fastener head has an end face with two angled sections. The first section extends forwardly of the face of the head and the second section extends forwardly of the first second. The included angle of the taper of the second section is between about 100.degree. and about 170.degree.. The head section is configured to fit into the counterbore of the panel.

Abstract: A method for producing a master plate and a master plate produced by this method which has highly accurately disposed fitting bores or fitting pins at prespecified coordinate intervals in order to form a precise grid system. The master plate serves to produce clamping plates identical to it for use in machining workpieces or building machinery. The fitting bores in the master plate are derived from insertable fitting sleeves which have a smaller diameter than preliminary bores disposed at the grid intervals in the foundation plate and are measured in their final position, preferably using measuring gauges having a zero dimension tolerance in the desired distance.

Abstract: A threaded fastener having an annular ring of yieldable friction material in the thread grooves thereof and bonded to the sides of the threads, in which the material is of substantially uniform thickness on the sides of the threads from adjacent the root to adjacent the crest thereof. In an embodiment of the invention two more adjacent but axially separated rings of friction material are provided, the annular zone or zones between adjacent rings having much less or substantially no friction material. In another embodiment, the friction material is applied primarily to the non-load bearing side of the threads in the ring.

Abstract: An improved fastening assembly having application for securing a filter element within an air cleaner and incorporating a novel wing nut construction. As used with an air cleaner, the wing nut is engaged with a large diameter threaded portion of a connecting bolt and acts to secure a filter element within an air cleaner housing, while an outer knob is engaged with a smaller diameter threaded section of the bolt and bears against a cover to secure the cover to a housing. The wing nut is provided with an inner threaded metal section which is molded within an outer plastic wing section. The inner nut portion includes a plastic ring having an inner diameter slightly less than the thread on the nut and serves to seal against the thread on the bolt and prevent leakage of air along the threaded connection, as well as preventing the loosening of the threaded connection due to vibration.

Abstract: There is disclosed an improved fastener of the type having a head portion, a shank portion extending from the head portion, and a plastic cover overlying the fastener head. The head includes an outer perimeter of generally square configuration having a plurality of substantially straight side portions. The upper surface of the head is provided with an oversized drive recess which extends along the diagonals of the square perimeter. As a result, the fastener head may be readily aligned within a mold which forms the plastic head cover. More particularly, anyone of the straight side portions may engage an alignment surface of the mold to permit the final drive recess forming portion of the mold to be readily aligned with and received by the initial over sized drive recess. The resulting plastic cover entirely overlies the fastener head and the thickness of the plastic within the oversized recess reduces the drive recess dimension to a final desired size.

Abstract: Playground equipment having wooden timbers includes a plastic fastener with a metal threaded core flushly mounted in the wooden timbers for interconnecting the wooden timbers to associated members of the playground unit. The plastic fastener has one-way tightening means and actuates the metal core by locking engagement with the metal core, thereby preventing disassembly of the playground equipment.

Abstract: The improved method of making externally threaded friction fasteners which comprises directing a stream of particles of thermoplastic friction material onto the threaded surface of the fastener which has been heated to a temperature sufficient to fuse the thermoplastic particles so as to provide a deposit of substantial thickness in the thread grooves of the fastener extending completely around the fastener, in which the fasteners are advanced past a station at which the thermoplastic particles are directed at one or both sides of the threaded portion, and which comprises spinning the fasteners during application of the particles at a rate sufficient to cause the deposit of particles to extend completely around each fastener, and preferably to comprise at least two sequentially applied applications.

Abstract: A prosthetic cement spacer for controlling the thickness of cement applied between a prosthetic insert and a support member, such as an acetabulum, includes a generally cylindrical standoff body portion fabricated from acrylic bone cement and a pointed wire concentric with said standoff body and outwardly extending from one end a sufficient length to anchor into the acetabulum bone surface. The method of use of these prosthetic cement spacers involves preparation of the acetabulum so that there is sufficient clearance space for the prosthetic cement spacers and then to insert the pointed wires into the acetabulum bone surface in an equilateral triangular arrangement thereby providing three points of contact for the prosthetic insert, such as an acetabular cup.

Abstract: A plastic-headed fastener assembly has a first outer and a second inner sealing flange. The second flange performs the secondary function of engaging the upper panel of two a member assembly which tends to climb the threads and holding it away from the head. The threads on the fastener can then strip out the hole in this upper panel so that it may return to its position adjacent the second member. This flange prevents damage to the plastic head which can result from friction generated heat.

Abstract: The torque of fasteners, such as bolts, nuts and the like, is stabilized by a torque stabilizing agent comprising an organic film forming material and about 2% to about 25% by weight of a surface active agent. Applying the torque stabilizing agent to a fastener prevents defect of the fastening part, such as disconnection or damage.

Abstract: A fastener set comprising a bolt body, a nut and a washer which are fitted onto the bolt body. Said bolt body has a notched portion which can be broken by a predetermined torsional force. Said nut is coated by a composition containing a ester obtained by only partial esterification of a polyol having not more than twelve carbon atoms and a fatty acid or an oxy-acid. The reaction force resulted from a fastening torque applied to the nut is transmitted to the bolt body so as to break off from the bolt body a surplus portion extending above the notched portion.