Abstract: A one-piece thermoplastic fastener assembly is disclosed having a friction-weld fastening surface with a centrally located heat-activated adhesive pellet. A plurality of deflector segments are integrally formed with the friction weld surface at the plurality of radial distances from the axis of rotation. The shape of the base member and the thickness of the plurality of deflector segments are selected to cause any imaginary straight line emanating from the axis of rotation and passing through the marginal edge of each intercepted deflector segment to extend below the radial plane which passes across the outer marginal edge of the innermost deflector segment to thereby causes even distribution of the heat-activated adhesive across the friction weld surface in response to a driving rotation of the base member.
Abstract: A polymerizable fluid for sealing and locking engineering parts contains components which allow 2 mechanisms of polymerization, the first of the mechanisms being initiatable by radiation such as ultraviolet light, and an opacifier such as a powder dispersed in the fluid, the opacifier rendering the fluid opaque to the radiation. A coating of the fluid is applied to one of the engineering parts and the coating is exposed to the radiation which initiates the first of said polymerization mechanisms, so that polymerization occurs only in a surface layer of the coating to form a dry tack free crust thereon. Due to the presence of the opacifier, the radiation is obstructed from passing beyond the surface layer and the subcutaneous fluid is unaffected by the radiation. The second polymerization mechanism, suitably a free radical addition polymerization of known type, is initiatable when two engineering parts are assembled together.
Abstract: Described is an adhesively securable fastener comprising a body having an opening; an adhesive positioned within said body and registering with the opening of the chamber, a plunger means for applying pressure to said adhesive such as against an anvil means thereby adhesively securing the fastener to a substrate. Also described is a method for securing a substrate using the fastener described herein.
Abstract: A threaded fastener having a deposit of a fluid polymerizable resin in the bottoms of the thread grooves, a fluid polymerizing agent overlying the resin in the thread grooves, and a strong non-tacky protective film covering the agent. The fluid resin and agent have therebetween a barrier film as a result of polymerization of the resin where it contacts the polymerizing agent. Preferably, the fluid resin and agent deposit includes abrasive particles, such as table salt to enhance mixing when the fastener engages a mating threaded member. In production, the protective film is applied as an aqueous solution of PVA, which is rapidly converted to the non-tacky film by the application of a desiccant powder such as a derivative of guar gum.
Abstract: A microencapsulated epoxy adhesive system is disclosed comprising in admixture epoxy resin capsules and encapsulated Ancamine TL (Pacific Anchor Chemical Co.) as the curing agent. When applied, for example to a zinc plated bolt and the bolt is tightened, the capsules break and the resin cures and provides good breakaway torques.
June 15, 1982
Date of Patent:
August 20, 1985
Capsulated Systems, Inc.
Ronald L. Hart, Dale E. Work, Colin E. Davis
Abstract: Into a bore which is about to receive a fastener such as a screw, nail or bolt, an adhesive capsule support basket is first placed and mounted at a desired intermediate level. One or more capsule(s) containing adhesive is (are) inserted into the bore and become supported by the basket at the intermediate level. As the fastener is installed, it contacts and bursts the capsule(s), spreading the adhesive at the fastening region. The basket, which is rather flimsy, is destroyed by installation of the fastener, after having performed its role.
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: The method of mass producing threaded fasteners having in thread grooves thereof deposits of locking material having a dry non-tacky surface outer surface which permits bulk storage of the fasteners which comprises continuously advancing a series of fasteners through a succession of operating stations to a collection station where the fasteners may be randomly arranged, while eliminating any provision for heating or drying operation, depositing a fluid material in thread grooves of the advancing fasteners, providing a water solution of a film-forming material covering the deposits as the fasteners continue to advance, and providing a light application of a fast acting desiccant in powder form over the film-forming material to convert the film-forming material substantially without significant delay to a non-tacky protective film over the deposits.
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 bolt anchor assembly including an anchor member to be imbedded in concrete, the anchor member having a hollow tubular portion and a base plate, the base plate projecting outwardly from the tubular portion, and a bolt projecting axially through the base plate and tubular portions for attachment to the base of a piece of machinery.
Abstract: Method and apparatus for providing friction producing ring patches on externally threaded fasteners which comprises depositing a fluid wetting agent on a predetermined thread area, supplying thermoplastic resin powder particles to the fluid deposit to form deposits of fluid mixtures, flash heating the mixture deposit to fuse resin particles only at the surfaces to produce a non-tacky skin, accumulating agglomerations of the fasteners and retaining them for an interval sufficient to permit at least substantially complete drying of the fluid mixture deposits to form substantially solid cohesive deposits of discrete resin particles, mass heating the fasteners to fuse the discrete resin particles into continuous fluid deposits and finally cooling the fasteners in separated condition to set the fused resin deposits into solid continuous resin deposits fused to the thread surfaces of the fasteners.
Abstract: A coupling to connect plastic pipe ends comprises:(a) a tubular coupling member consisting of plastic, and having a bore at its mid-portion, two counterbores respectively intersecting opposite ends of the member, and two annular step shoulders respectively between the counterbores and said bore,(b) plastic pipe ends inserted into the counterbores to extend proximate the step shoulders, the pipe ends adhesively joined to the counterbores,(c) threaded fasteners extending generally radially through the coupling member to intersect the counterbores, the fasteners having tapered threads and tips that penetrate radially into the pipe ends,(d) the fasteners having heads and there being seal means sealing off between the fasteners and the coupling member and pressurized therebetween.
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: The method of making self-activating thread lock structures which comprises depositing a fluid material including an uncured fluid resin in the thread grooves of a threaded member; immediately thereafter, while the material is still in fluid condition, applying a thin fluid film-forming cover coat over the fluid material; and immediately thereafter transforming the cover coat into a thin, solid, dry, non-tacky, rupturable film by brief exposure to radiation, such as ultra-violet radiation.As previously noted excellent results have been obtained using ultra-violet lamps as the source of radiation to effect substantially immediate cure of the film-forming material, but other sources are contemplated, such as electron beam radiation.
Abstract: A friction material in the form of a substantial percentage of cured or polymerized powdered nylon and/or teflon resin is mixed in a binder which is mainly fluid epoxy resin and an activator therefor, and applied to the threaded portion of a threaded member. The epoxy resin is reacted by the activator at room temperature or at least at a temperature well below the fusion point of the nylon or teflon particles to bond the powder particles together and to establish a bond to the thread surfaces to form a substantially uniform mixture of the powder particles and binder and to form a substantially solid, non-tacky, resilient friction element strongly bonded to the thread surfaces and frictionally interfering with the threads of a mating threaded member.
Abstract: A kit for repairing puncture holes in a tubeless tire; the kit including an assortment of different diameter sized plugs, contained in a box, for selection of a plug matching a puncture hole size, each plug including a hollow screw of resilient rubber, so that, while being screwed into the puncture hole, a liquid rubber is wrung out therefrom, through side holes in the screw, in order to form an air-tight bond between the screw and the puncture hole.