Abstract: A thread fastener for fastening resilient material workpieces with small torque to obtain a strong fastening force, wherein the fastener is provided with equivalent height continuous thread convolutions on a shank and a plurality of spaced thread-type projections are petaliferously formed and on the equivalent height thread convolutions which are arranged at an appropriate lead angle.

Abstract: A fastening device adapted for quick attachment to a threaded rod at any point along the length of the rod, comprising a fastening element having a web and first and second generally flat flanges extending outwardly from the web in spaced-apart substantially parallel relation. Each flange has opposite side edges and an outer edge opposite the web. A pair of recesses extend inwardly from respective side edges of the flanges at opposite sides of the fastening element, the recesses having rounded generally concentric inner edges threaded to mate with the threads of the threaded rod. A retainer is provided for retaining the inner edges in threaded engagement with the rod.

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: The disclosure relates to an expansion pin consisting of a shank which at one end is provided with means for securing articles and at the other end is provided with a point. In order to obtain an anchoring having further expansion effect, the shank has an aperture in the form of a slot in which there is inserted a plastically and/or resiliently deformable insert which thickens the shank of the expansion pin in the region of the slot.

Abstract: An assembly for fastening a compressible layer of insulation includes a threaded screw projecting through the center of a flat circular disk of a resilient plastic material. A central hub on the disk is received between the head and a flange spaced below the head to hold the disk adjacent the head, the hub being defined in part by resilient fingers which flex outwardly to let the flange pass through the hub as the screw and the disk are assembled together. An annular surface is formed on the underside of the disk at the periphery thereof to engage the insulation and ribs which decrease in width are formed on the underside of the disk and project radially from the hub to the peripheral surface so that an uplift force causes the disk to flex upwardly progressively from the periphery toward the center.

Abstract: An improved fastener includes a shank section which extends outwardly from a head section. The head section has a rim with an inner side surface which cooperates with an outer side surface of the shank section to form a groove. The inner side surface of the rim includes a plurality of indentations which are separated by side surfaces. The outer side surface of the shank section also includes a plurality of indentations which are separated by side surfaces. The side surfaces on the rim are disposed radially outwardly of the indentations in the shank section and cooperate with the shank section to form a plurality of constrictions. Similarly, the indentations in the rim are disposed outwardly of the side surfaces of the shank section and cooperate with the side surfaces of the shank section to form a plurality of constrictions. The constrictions apply deformation forces to material on which the fastener is mounted upon application of torque load to the fastener.

Abstract: An adjustment mechanism for adjusting the relative position of at least two parts. A first movable member has two bores formed therein with a frusto-conical portion formed at one end of the bores. A second fixed member has a pair of threaded apertures formed therein. The apertures in the fixed member have a distance between their axes different from the distance between the axes of the bores. Threaded cams are disposed within the bores and apertures so that rotation of the threaded cams causes an adjustment force to be applied to the movable member.

Abstract: A retaining member (26) is constructed undersized from a memory metal for permitting a member (26) disposed in an element retaining position to recover and grippingly engage a stud (12) on which the member (26) is arranged. The retaining member (26) can be used alone, or in combination with a load-carrying nut (16) for greater strength. Providing a convex face (46) on the retaining member (26), and a concave surface (40) on the load-carrying nut (16), permits the total height of the arrangement to be limited to only slightly more than the height of the load-carrying nut alone in order to meet existing space limitations.

Abstract: A quick-release fastener comprises a threaded stud (11) and a complementarily threaded receptacle (1), the stud and receptacle each having one or more longitudinally extending threaded and unthreaded portions (15,8). The or each threaded portion (15,8) of the stud (11) and receptacle (1) respectively has a lesser angular width than the unthreaded portions of the receptacle and stud respectively. The fastener has at least one stop (9) at one edge of the or one of the threaded portions (8,15) on the stud or receptacle, whereby the stud can be inserted into the receptacle with the threaded (8,15) and unthreaded portions of the stud (11) and receptacle (1) respectively aligned and can thereafter be rotated to engage the respective threaded portions. The stop (9) prevents over-rotation of the stud (11) within the receptacle (1) thereby to define a fastened orientation of the stud within the receptacle.

Abstract: A non-rotating toggle bolt assembly in which a trunnion nut received on the end of a screw whose length exceeds the thickness of the hollow wall for which the assembly is intended, pivotally supports a pair of spring-biased toggle wings. The wings are normally outstretched; but when the assembly is pushed through a hole drilled in the wall, the wings then fold in against the screw to permit passage therethrough. On emerging from the hole, the pivoting wings resume their outstretched state at a position well displaced from the inner surface of the wall. Included in the assembly are locking means which act to prevent rotation of the outstretched wings when, in the course of installation, the operator turns the screw to advance the toggle axially toward the inner surface of the wall to tighten the assembly, and which also acts to prevent loosening of the assembly such as might be caused by vibration, after such installation.

Abstract: A screw-type fastener having a threaded shank and a head integral therewith, and adapted to be driven into a structure by axial rotation about its longitudinal central axis in a driving direction such that the head is countersunk, is improved by forming the head with at least two ribs protruding from the surface thereof and extending radially outward from the central axis. The ribs define a corresponding number of sector-shaped cavities adapted to receive a filler material for engaging the ribs so as to prevent the fastener from axially rotating in a direction opposite the driving direction and to thereby secure the fastener against loosening.

Abstract: An expansion dowel arranged to be anchored in a borehole includes an axially extending dowel member having a leading end and a trailing end and being partly sleeve-shaped extending from the trailing end. A wedge-shaped recess is formed inwardly from the outside surface of the dowel with the depth of the recess decreasing toward the leading end of the dowel member. A complementary shaped wedge member is located in the recess and is displaceable therein toward the leading end of the dowel member. An annular groove formed in the dowel member from the leading end toward the trailing end. The depth of the annular groove increases for at least a part of the axial length from the leading end of the dowel member. An expansion member is seated in the annular groove and extends around the dowel member. The expansion member has a stop shoulder located in the path of the wedge member as it is displaced toward the leading end.

Abstract: A screw-type fastener comprising two cooperable assemblages for releasably securing a panel having one of said assemblages to an underlying support structure such as a sub-panel or other framework having the other assemblage. The said other assemblage of the fastener comprises a tubular housing enclosing a screw member which projects forwardly to an open end of the housing, toward the opening thereof. The said one fastener assemblage comprises a floating stud body carried by the panel and having an internally threaded bore which is adapted to receive the screw member when the stud body is applied thereto. The housing has ratchet disks encircling the screw member, provided with opposed faces containing radial teeth which engage one another. One disk is keyed to rotate with the stud body, and the other is keyed for longitudinal non-rotary movement in the housing. A spring in the housing maintains the disks in contact.

Abstract: A threaded insert for drywall having an externally threaded portion and an unthreaded drilling portion of generally equal lengths. The insert is adapted to be installed in a single step with the use of a hand powered screwdriver. A low profile flange at the upper end spaced a distance from the threads allows the insert to be installed flush with the surface of the drywall. Two embodiments are disclosed, one of molded zinc and the other of plastic material. Both embodiments include a drilling portion which can be deflected laterally upon the insertion of a screw therethrough, allowing the use of a single moderate length screw for attaching articles of various thicknesses. The insert eliminates the need to pre-drill a hole with a separate tool.

Abstract: A two piece, resilient plastic assembly for decoratively covering the head of an installed fastener such as a screw or the like. The assembly comprises a resilient base member adapted to be held by the fastener or screw upon a planar portion of a workpiece. A resilient anchor member includes a planar, flange like base of generally circular cross section having a central orifice defined therein through which a screw or fastener passes, and an integral peripheral rim having an external surface upon which a plurality of radially spaced apart petals are integrally formed. A cup-like, resilient plastic cover plate adapted to be snap-fitted upon the anchor includes a generally convex top portion and a peripheral downwardly projecting rim. The cover plate rim includes a snap fit groove into which the anchor petals are received.

Abstract: A quick acting, self locking fastener of the spiral cam type is provided with a receptacle comprising a housing having a bottom, open top and a pair of opposed sidewalls. One of the walls is provided with a lip at the top thereof and the opposed wall is provided with a slot at its top. The closure for the housing includes a pair of biased faces which define a clip therebetween. The bottom face is provided with a slot at one end and a lip at the opposite end. A spring within the housing includes a central section that forms a cross pin for an associated stud and end sections that serve to bias the opposed sidewalls apart to secure the engagement of the sidewall's lip and slot with those of the bottom face of the closure.

Abstract: An expansion dowel assembly consists of an axially extending sleeve and a spreading element. Tongues are pivotally displaceably connected to the sleeve and are located one after the other along the axial direction of the sleeve. The tongues are split in the axial directions and can be pivoted inwardly and outwardly relative to the sleeve. Lugs are formed on the radially inner surface of the tongues and project axially beyond one end of the tongues. The lugs afford axial support for the tongues pivoted outwardly relative to the outside surface of the sleeve. The spreading element holds the tongues in the outwardly pivoted condition so that the tongues provide a mechanical lock for the sleeve within a hollow space within a structural member.

Abstract: A fastener with a metal stud removably receivable in a plastic carrier member. A shank of the stud is inserted through a hole in the carrier member and an enlargement on the shank limits the extent to which the shank can be pushed through the hole. The stud is retained in the carrier member by entrapment of a portion of the carrier member surrounding the hole between the enlargement and a ring on the shank which has an interference fit with the hole. To facilitate inserting the ring into and removing it from the hole, the sides of the ring are tapered. The carrier member can be journaled on the shank to rotate freely with respect to the stud. If it is desired to prevent this rotation, the enlargement can have a non-circular configuration and be received in a mating non-circular recess in the carrier member.

Abstract: A first wallboard and a second wallboard in edge-to-edge abutment are secured to an underlying stud by a double acting fastener which bends around the stud from a flange to the web where a screw passing through a bight in the fastener holds it in place. Oppositely oriented wire talons 20 and 25 are extensions of a first arm 17 and a second arm 18, respectively. Talon 20 is impaled in the edge of the first wallboard and talon 25 is impaled in the edge of the second wallboard. A loop 23 in the second arm 18 rests behind the first wallboard and both arms rest behind the second wallboard. A force tending to move either wallboard away from the stud is resisted by both arms.

Abstract: A self-aligning post is presented to direct and/or balance a load being transmitted. The post has a semispherical end section split from the remaining main cylindrical portion of the post whereby misalignment of the main cylindrical portion is compensated by the split end section. The post is further provided with means for retaining the cylindrical portion in contact with the semispherical end section and for preventing the split end section from slipping from a socket. Preferably, the retaining means is an annular skirt disposed along the flat perimeter of the semispherical end section wherein the cylindrical portion of the post will bear against the skirt during misalignment and thereby prevent slippage.