Abstract: A bolt for connection two parts with one another has a bolt member having an axis, a threaded portion provided with a thread, and another portion having a polygonal circumference, a friction member connected to the polygonal circumference of the other portion of the bolt member and having a first facial area adapted to abut against a facial area of one of the parts, and also having an opposite second facial area, and a sleeve connectable to the thread of the threaded portion of the bolt member and having a facial area abutting against the second facial area of the friction washer, so that when a given force is applied in one direction to the bolt member and a given force is applied in an opposite direction to the sleeve, only the sleeve turns while the bolt member is elongated or relaxed.

Abstract: A screw fastener with a second, additional external thread section apart from the main, external or internal, thread section in a typical bolt or nut, respectively. The axes of the two threaded sections in the nut or bolt are arranged parallel, eccentric, or angled relative to each other and the direction in which the thread travels for any threaded section may be the same, or different from the thread in the other section. A cap may also be formed on top of the externally threaded structure.

Abstract: The retractable die clamp for a pellet mill includes a clamp segment having a generally C-shaped cross-section with radial extending flanges for wedging the die ring flange and mounting or quill flange of the pellet mill frame against one another, securing the ring to the frame. The clamp includes end bolts threaded into the mounting flange. A centrally located Acme fastener has an externally threaded sleeve and a bolt extends through the sleeve and is threaded into the mounting flange. The Acme fastener also includes an internally threaded nut restrained on the clamp for limited axial movement. The nut is also rotatable relative to the clamp to back the clamp radially away from the mounting flange to retract the clamp from the ring and mounting flanges. The Acme fastener also maintains the clamp attached to the frame by the bolted connection when the clamp is backed off the mounting and die ring flanges.

Abstract: An improved screw head nail includes a cylindrical machine screw and a nail having an upper end defining a nail head, a lower end defining a nail point, and a nail shank disposed therebetween. The nail shank has a centrally disposed threaded cylindrical bore extending from the nail head towards the nail point. The nail head has a generally frustoconical opening formed therethrough which is aligned with and opens onto the cylindrical bore and which, upon flattening of the nail head, protects the cylindrical bore from substantial damage and exposes the same for allowing full threaded receipt of the machine screw therein.

Abstract: A self-drilling/self-tapping fastener which is suitable for attaching a sprinkler system to a metal supporting structure has a driving head and an integral shank with a threaded portion. Process-hardening and threading of the shank harden the shank to a degree of hardness that retains sufficient ductility for resisting vibration loads. The drill tip at the end of the shank and the lead threads adjacent the drill tip are locally hardened to a relatively high degree of hardness for drilling and tapping the metal support members. A graduated transition zone separates the high-hardness zone from the lower-hardness zone, which allows for a single fastener to exhibit two distinctly different material properties in one fastener. The fastener through this dual process also exhibits two distinct load-carrying capabilities.

Abstract: Apparatus for securing together structural members includes a stud threaded at both ends and a stud sleeve threaded at both ends. The stud and stud sleeve are coaxial with the stud extending through the stud sleeve and beyond the ends of the stud sleeve. The threaded stud ends and the threaded sleeve ends are separately threadedly connected to the structural members so that both the stud and stud sleeve apply forces to the structural members to secure them together. No significant transfer of load between the stud and the stud sleeve will occur.

Abstract: A fastener system includes an applicator for engagement by a tool, and a fastener such as a screw having a first surface with first screw threads in a one hand direction for engaging a workpiece. An attachment mechanism is provided to transfer rotational force from the applicator to the fastener and has second and third screw threads in an opposite hand direction to the first screw threads. The second and third screw threads are interfaced to establish a torque of the predefined magnitude prior to the fastener being attached to the workpiece. When the torque applied by the tool exceeds the predefined magnitude, the attachment mechanism begins to unthread and further application of torque from the tool to the fastener ceases, thereby controlling the applied torque to no greater than the predefined magnitude. The attachment mechanism can be used in a variety of applications including flush mounted heads, shallow aperture installations and multistage torque mountings.

Abstract: A camera support (10) for supporting a camera (12) having a threaded opening in an exterior wall thereof. The support (10) comprises a shaft (15) having first (16) and second (18) ends and a longitudinal axis extending therebetween. Course self tapping anchor threads (20) are disposed on the first end (16) of the shaft (15) for threadingly engaging a support structure (22). Machine-type support threads (24) are disposed on the second end (18) of the shaft (15) for threadingly engaging the threaded opening in the camera (12). A handle (26) extends transversely to the axis of the shaft (15) for manually rotating the anchor threads (20) into the support structure (22).

Abstract: A kit comprised of an elongated threaded bolt having two end portions and an intermediate threaded portion therebetween. The two end portions have Allen wrench drives formed therein. The device includes a pair of removable cap heads each having an inner surface and an outer surface. The inner surface has an internally threaded aperture formed therein. The internally threaded aperture is adapted for removable coupling with the two end portions of the elongated threaded bolt. The inner surface of the removable cap head has a circular groove formed therein surrounding the internally threaded aperture thereof for placement of an O-ring therein. The outer surface of the removable cap head has an Allen wrench drive formed therein.

Abstract: A cam bolt system comprising a bolt with a threaded shaft and a head on one end thereof, wherein a cross section of the shaft is trilobal in shape and wherein the trilobal shaped shaft is threaded from one end opposite the head substantially the length of the shaft to the end with the head thereon, first and second cams, each identical to the other and each having a generally circular perimeter and a triangularly shaped opening of substantially similar shape to the trilobal shape of the shaft and sized large enough so as to freely slide on the shaft, wherein the shaft extends through the openings of the first and second cams and wherein neither the first nor the second cam can substantially rotate with respect to the shaft and wherein the two cams are identically aligned with respect to the shaft, and a nut threadably engaging the shaft maintaining the first and second cams in position on the shaft.

Abstract: An implant has an implant member which is implantable in a bone material and has an axial threaded bore at one end which receives a threaded element which may be an implant post, an implant extension or a post for attachment by means of a screw connection. The threaded element has a head with a diameter greater than an outer diameter of the implant member adjacent the one end and the head has a pressing surface extending substantially at right angles to the axis of the implant member and beyond the outer diameter of the implant member. The head also has a circular recess between the pressing surface and the outer threads of the threaded element, which recess will receive an edge of the one end of the implant member when the threaded element is received in the threaded bore to prevent body tissue from growing into any slit or crevice between the implant member and the threaded element.

Abstract: A quick die change capability is provided to a pellet mill by means of a fixture spider which can be attached to the pelleting die and to the rollers for a unitized roller/die cartridge. By employment of quick acting captive die clamps, as well as push-pull jacks, assembly and dismantling of the die/roller cartridge in the mill is simplified. Three axis adjustability of the fixture spider enhances ease of alignment.

Abstract: The invention relates to a headed screw for fixing an intramedullary nail in position. An external thread on the screw shank is provided over all, or a part of spaced parts, of the length of the shank. The screw head is provided with an external thread having a direction of helical advance which is opposite the direction of helical advance of the screw-shank thread.

Abstract: A straight, double-threaded arthrodesis screw that comprises a threaded compression nut mounted thereon. The screw consists of a shank containing distal right-handed threads for screwable connection with a threaded hole in the bone, proximal left-handed threads on which the compression nut is screwably mounted, and a longitudinal perforation for engagement with an installation tool. A hole is first drilled and tapped in the bone to provide an internal right-handed thread conforming to the distal threads of the arthrodesis screw. The screw is installed on the bone by screwably mounting its distal portion in the hole. The compression nut is then rotated toward the proximal cortex of the bone until it contacts the soft tissue surrounding the hole in the bone. The soft tissue is secured in place between the compression nut and the bone's cortical surface by further screwing the distal threads into the bone while preventing the compression nut from turning with respect to the clamped tissue.

Abstract: The invention relates to a screw for fixing an intramedullary nail in position. An external thread on the screw shank is provided over only a part of the length of the shank. The screw head is provided with an external thread having a direction of helical advance which is opposite the direction of helical advance of the screw-shank thread.

Abstract: An improved, elongated threaded fastener is disclosed having a first portion with first threads and an adjacent second portion having second threads. The diameter of the second portion is greater than the diameter of the second portion, while the pitch of the threads on the second portion is less than the pitch of the threads on the first portion. The second portion is also formed with a driver engaging surface to engage a driving tool to apply a rotative force to the threaded fastener. A nut is threaded onto the second end portion to enable the threaded fastener to be utilized for nut packing or micro-adjustment.

Abstract: A modular unit having a slot or prepared hole on a face plate is mounted to a rack by a threaded fastener having at least a first and a second threaded portions along its length. A nut for fastening to the second portion of the threaded fastener is designed to have a greater diameter and a pitch predetermined for quick assembly and release, while the first portion is fastened to a rack.

Abstract: A hanger nut assembly for attachment to a concrete wall form so as to embed a hanger nut of the assembly in a wall being constructed. A headless screw attaches the nut in abutment with the wall form and is readily removable to facilitate form stripping. A pipe hanger rod is subsequently engageable with the wall installed nut after wall completion.

Abstract: A bolt head assembly comprises a circular bottom and a longitudinal straight walled section extending upwardly therefrom. Only the longitudinal section is threaded. A separate shank is threaded into an internal threaded portion of the bolt head. A washer and nut at the end of the bolt are used to secure a commode. In the event that the commode has to be replaced or any other exigency exists the shank can be easily removed from the head despite binding of the nut and washer to the bolt because of corrosion. Application of torque to the nut would cause the threaded shank to separate from the internal threaded portion of the head and be removed along with the nut and washer.

Abstract: A lifting eyebolt assembly for engagement between a workpiece to be lifted and a lifting device includes a load-bearing ring that is connected to the workpiece by a threaded fastener. The load-bearing ring includes a base portion having a threaded central cavity. The fastener includes a threaded head portion for engaging the threaded cavity of the base portion of the load-bearing ring. The fastener also includes a threaded shaft portion for engaging a threaded bore within the workpiece. In one aspect of the invention, an access hole is provided between the eye portion of the load-bearing ring and the central cavity. In addition, the head portion of the fastener includes a recess disposed beneath the access hole to permit engagement with an allen wrench passing through the access hole. In one embodiment of the invention, the workpiece includes a recess around the threaded bore within which the head portion of the fastener is received when connected to the load-bearing ring.

Abstract: A puzzle is disclosed which includes an elongated left-hand threaded bolt carrying a split lock washer and having a nut at one end. The other end of the bolt is partially threaded into a second nut which has a short length of another bolt threaded at its end. The object of the puzzle is to figure out how to remove the lock washer from the bolt.

Abstract: A lifting eyebolt assembly for engagement between a workpiece to be lifted and a lifting device includes cylindrical collar that is held in place against the workpiece by a threaded fastener. A load-bearing ring is threadedly engaged to the collar to enclose the collar and the fastener. The load-bearing ring includes an eye portion for engaging the lifting device and a base portion for engaging the collar.

Abstract: A screw-in plug provided with a pointed conical thread section (4) and an insertion point (5) has a stop collar (6) adjoining the thread section (4). A head (7) moulded onto the stop collar (6) serves as a bearer of a screwing-in slot (13) and of a moulded-on holding member (14). The plug, preferably made in one part out of plastic, can be screwed into any wall covering of low strength, and permits the provisional or permanent mounting of varied useful objects.

Abstract: a lifting eyebolt assembly for engagement between a workpiece to be lifted and a lifting device includes a cylindrical collar that is held in place against the workpiece by a threaded fastener. A load-bearing ring is threadedly engaged to the collar to enclose the collar and the fastener. The load-bearing ring includes an eye portion for engaging the lifting device and a base portion for engaging the collar.

Abstract: Improved guidance devices, particularly guidance flutes and guidance tips, as used to guide pointed fasteners, particularly drive pins of different lengths and threaded studs, as such fasteners are driven through muzzle bushings of powder-actuated tolls, are disclosed. Such a guidance flute, as extruded from an elastomeric material, has four pairs of non-radial ribs protruding outwardly from a tubular body. Each pair consists of one relatively short rib and one relatively long rib in parallel relation with respect to each other, upon opposite sides of a diametrical plane, when the ribs are unstressed. Such a guidance tip, as molded from an elastomeric material, has a cap portion and a flared skirt, which has plural slots extending toward the cap portion and dividing the skirt portion into plural flanged or flared portions. Such guidance devices, when assembled with such fasteners, can be snugly fitted within a muzzle bushing having a bore diameter within a range of bore diameters.

Abstract: A positioning system for accurately setting anchor bolts in concrete construction work. The anchor bolt is assembled in a formwork template with a threaded flange on the inner side of the template and a closed end sleeve having a flange covering the projecting outer, threaded end of the anchor bolt to firmly position the anchor bolt perpendicular to the concrete surface during pouring and setting of the concrete.

Abstract: A nut and stud assembly for securing workpieces via threaded engagement of the stud with one of the workpieces and engagement of the nut with another of the workpieces and with the nut preassembled on the stud with the stud having a stop preventing the nut from advancing further on the stud until the stud has reached a preselected position in the one workpiece whereby the nut and stud assembly will function similarly to a headed bolt until the preselected position is attained and thereafter the stop will permit movement of the nut on the stud through such stop and be free running to function similarly to a separate nut and stud combination to a final clamp up of the workpieces.

Abstract: A safety lock for adjustment locking structures in which a set screw is passed longitudinally through a jam screw element at a position off-center from the axis and parallel to the axis of the jam screw and locking the jam screw against the end of the coaxially adjacent element in the adjustment stack.

Abstract: A fastener assembly for connecting lightweight roofing structure laminations is shown. The assembly comprises a toggle bolt with an unremovable toggle nut on the lower end of the toggle bolt stem, securing the lower surface of the lamination, and a flanged cap nut threaded on the toggle stem's upper end which secures the lamination's upper surface. The flange cap nut is fitted with a recess complementary to, and adapted to receive a keeper nut fitted with a recess which allows torquing of the flanged cap nut. The keeper nut is also adapted to connect with the top end of the toggle bolt stem in a way, that locks the flanged cap nut and toggle stem together so that the same are incapable of independent rotation, thus preventing the loosening of the fastener assembly.

Abstract: A limb adjustment bolt for a compound archery bow includes a threaded shank for releasably attaching a limb to a handle portion of the bow. One end of the shank is connected to a generally circular flange which in turn is attached to a head of the bolt. The head is generally rectangular in cross section and has a longitudinal axis which is perpendicular to the longitudinal axis of the shank. A central portion of the head tapers outwardly and is attached to the flange. The head can include a threaded aperture for receiving a couterweight. Furthermore, the bolt can be formed of a separate head and shank.

Abstract: The anchor includes a stud holder having one end which threadably receives a threaded stud. A flat tongue-like driving head projects axially from the other end of the stud holder and is formed with an eye for receiving one end portion of a wire tie for establishing a positive lateral load connection between an outer masonry veneer wall and an inner supportive wall having a layer of insulation thereon. An integral, radially extending flange is formed at the inner end of the driving head and stabilizes the stud holder while the latter is being driven by a power-rotated socket. When the stud is fully driven, the flange seals a hole drilled in the insulation by the stud holder. The inner end of the stud holder includes cutting elements which enable the stud holder to drill effectively through both hard and soft insulation. The eye through the driving head is shaped so as to eliminate the need of establishing precise angular alinement between the driving head and the wire tie.

Abstract: A manhole cover locking bolt construction for locking a manhole cover to an associated frame including a bolt having a threaded shank and an externally threaded head and an endless curvilinear groove in the top of the head for receiving a key of mating configuration for threading the bolt into and out of the manhole cover frame, and a cap for threadably mounting on the externally threaded head to protect the curvilinear groove against entry of foreign matter.

Abstract: An elongated shank has a first section with circumferential grooves arranged for anchoring engagement with a power tool. The shank also has a second section adjacent the first section with circumferential grooves. A collar is arranged to be placed on the second section and also arranged to be swaged into locking engagement therewith by a power tool. A third section at the end of the shank opposite from the first section has screw threads and this section receives a nut in threaded engagement to form a removable and adjustable abutment in association with work pieces and the collar which has been preloaded against the work piece and swaged by a power tool. The shank may be provided with a wrench engaging portion for holding it against rotation when the nut is turned. As an alternative, the collar may be provided with the wrench engaging portion.

Abstract: Projecting device for presentation of pictures and of a kind which includes a lockable transport safety device (4, 10, 21) for members (8) which are movable for adjustment purposes and which are of such weight and form that they require the safety against shocks and vibrations. For the adjustment an adjustment device is provided having an operating member (17). The transport safety device (4, 10, 21) is so arranged that it for locking purposes requires a locking element (21). This locking element also is provided to alternatively accomplish a movement of the adjustment device (3) when operating the operating member (17) for the adjustment, whereas the adjustment device (3) being released from actuation from the operating member (17), when the locking element (21) is positioned in the transport safety device (4, 10). In this way no adjustment can take place, when the transport safety device is locked.

Abstract: A tool is disclosed for both drilling a hole and thereafter securing a screw anchor therein in a quick and expeditious manner. The tool comprises a handle with a threaded stem extending therefrom. The threaded stem allows a screw anchor and a hard plastic drill tip to be threadably mounted thereon. The tool facilates the manual application of sufficient drilling pressure to the thus mounted drill tip so as to form the appropriately sized hole for the screw anchor.

Abstract: A fastening assembly for use in fastening a thick insulating layer 8, typically between 130 and 300 mm, onto a roof decking 9 comprises a self drilling and self tapping screw-threaded fastener 1 having a driving head 11; a load distributing plate 2 for engaging the upper surface of the insulation material 8 to hold it and distribute the fastening load so that the fastening assembly does not pull through the insulation material; and, an extensible resilient member 3 having one end 6 coupled to the head of the screw-threaded fastener 1 and the other end coupled to the load distributing plate 2. At least one coupling permit the screw-threaded fastener 1 to rotate with respect to the load distributing plate 2 to allow the fastener 1 to be driven through and screwed into the roof decking 9 to fasten the insulation material 8. The provision of a resilient element 3 accommodates minor variations in the manufacture of the insulation material, and distortions and deformations of it that occur in use.

Abstract: This specification describes a new anchor or rock nut which is used in association with an anchor bolt to rupture packages of two or more component setting mixtures. The nut is characterized by having a plug of thermosetting resinous material formed in situ which plug may be removed by the anchor bolt when screwed into the nut under the application of a pre-determined force which cause the plug to crumble; however until the predetermined force is reached the nut will cause the bolt to rotate.

Abstract: The disclosure herein includes an apparatus and method for positioning an anchoring device in the form of a coil in a pre-drilled hole for firmly engaging a lag screw or other member. The coil consists of a series of turns and may be made of steel or plastic or combination thereof which, in use circumferentially expands in the wall of the hole and helically elongates toward the bottom of the hole. The lag members used herewith can be removed and reinserted into the embedded coil as required. Depth indicating means is placed on the setting apparatus such as a lag screw or other tool so the anchor device or coil can be positioned to a precise depth. The anchor device or coil may be formed of a suitable diameter metallic wire or may be molded or die cast from a metal or plastic material.

Abstract: A bolt is fabricated from an elongated threaded rod by severing the rod along a planar surface angularly oriented with respect to a longitudinal axial plane through the rod. A cup-shaped nut has three equicircumferentially spaced lateral locking openings in the side walls adjacent the outer base wall thereof. The cup-shaped nut has an axial length greater than twice the diameter of the opening, with the opening in the half of the nut including the base wall. The nut is threaded onto the severed end of the rod with the base wall abutting the end of the rod. At least one locking opening is exposed to the inclined planar surface, and a pin is forced into the exposed opening with the inner end of the pin terminating within the nut and located immediately adjacent to the inclined surface thereby affecting a positive interconnection of the nut to the rod. In one embodiment the pin is a solid pin formed of a softer metal than the rod.

Abstract: A curtain-wall masonry veneer anchor system provides tolerances for accommodating installation misalignment and similarly for accommodating in-service load stresses while at the same time preventing loosening in service, even when installed through sheathing/or insulation covering wall structure to which the system is affixed, such as a masonry wall or metal stud or structural steel.

Abstract: A bolt is fabricated from an elongated threaded rod by severing the rod along a planar surface angularly oriented with respect to a longitudinal axial plane through the rod. A cup-shaped nut has three equicircumferentially spaced lateral locking openings in the side walls adjacent the outer base wall thereof. The cup-shaped nut has an axial length greater than twice the diameter of the opening, with the opening in the half of the nut including the base wall. The nut is threaded onto the severed end of the rod with the base wall abutting the end of the rod. At least one locking opening is exposed to the inclined planar surface, and a pin is forced into the exposed opening with the inner end of the pin terminating within the nut and located immediately adjacent to the inclined surface thereby affecting a positive interconnection of the nut to the rod.

Abstract: A theft deterrent device for "bolting" pieces of material together, comprising:(1) a nut-like device having a smooth outer surface resistant to the effects of conventional wrenches,(2) a male threaded member having an internally threaded axial bore, adapted to threadedly engage the nut-like member,(3) a locking screw for threadedly engaging the internal bore of the male member, and having a head that mates with the smooth outer surface of the nut-like device, resulting in an essentially smooth, continuous outer surface resistant to removal using conventional wrenches, and(4) an environmental plug for inserting into the driving recess or bore of the screw to prevent foreign and corrosive matter from entering the recess. The locking screw threads are of opposite hand to that of the nut-like portion, so that the locking screw must first be removed before the nut may be removed.