Abstract:
An insert is receivable into a sandwich panel assembly via a through opening in one panel, the insert comprises: A. A SHANK AND A PAIR OF SPACED HEADS INTEGRAL THEREWITH, ONE HEAD BEING GENERALLY CIRCULARLY SIZED FOR CLOSE RECEPTION IN THE ONE PANEL OPENING WHEN THE OTHER HEAD AND SHANK ARE INSERTED INTO THE SPACE BETWEEN THE PANELS, B. THE ONE HEAD BEING APERTURED TO PASS HARDENABLE MATERIAL INTO THE PANEL SANDWICH ASSEMBLY AND INTO THE SPACE BETWEEN THE HEADS TO PERMANENTLY RETAIN THE INSERT TO THE PANEL ASSEMBLY, AND C. A RADIALLY INWARDLY YIELDABLE RETAINER RETAINED ON THE INSERT ADJACENT AND AT THE SIDE OF THE ONE HEAD WHICH FACES THE OTHER HEAD, THE RETAINER LOCATED TO BE DEFLECTED RADIALLY INWARDLY WHEN INSERTED THROUGH THE ONE PANEL VIA SAID OPENING AND TO EXPAND RADIALLY OUTWARDLY IMMEDIATELY ADJACENT THE INNER SIDE OF SAID ONE PANEL TO TEMPORARILY RETAIN THE INSERT AGAINST DISLODGEMENT FROM THE PANEL ASSEMBLY PRIOR TO HARDENING OF THE MATERIAL IN SAID ASSEMBLY.
Abstract:
A self-tapping stud assembly is provided, including a positive locking ring, the stud assembly being adapted to be driven into a cylindrical opening formed in a workpiece, and securely but removably locked to the workpiece by an externally threaded sleeve which is threadable into the tapped opening.
Abstract:
A washer-like safety device serving as a retainer for a headed fastener, such as a screw. The invention contemplates the screw or other fastener being applied in a counterbored passage having in the wall thereof an undercut forming a groove. The retainer is here disclosed as a plate having parallel sides, rounded ends, and a central aperture. The ends are flat and co-planar while the side portions bounding the aperture are offset in the form of an inverted ''''V.'''' The retainer is dimensioned to easily set in the counterbore cavity to overlie the slotted or socketed head of the screw, whereupon its side portions are flattened to project its rounded ends to bridge the cavity and enter the groove. This retains the screw in the body to which it is applied while permitting its rotation for engaging to or disengaging from a related structure.
Abstract:
A bolt for attaching elevator buckets to elevator belts, said bolt comprising a threaded shank adapted to receive a nut thereon, a broad shallow conical head integral and coaxial with said shank, and a pair of sharpened teeth of special shape carried by said head at diametrically opposite sides of and in spaced relation from said shank and extending from said head in the direction of said shank, and a method of forming each of said teeth consisting of cutting said head from the periphery thereof along a line acutely angled to the adjacent edge thereof, and forming a right angled bend along a line from the inner end of said cut to the adjacent edge of said head.
Abstract:
An assembly for firmly anchoring a bolt, especially in sheet metal or other relatively thin stock. A keyhole-shaped opening is provided in the base and a special nut is inserted in the large part of the opening and moved laterally into the elongated narrower part with grooves in each side of the nut engaging the base on each side of the elongated opening. A resilient plug of rubber or plastic is inserted into the large part of the opening to prevent movement of the nut.
Abstract:
An adjustable mounting means is precast in the concrete structural member to be mounted. The adjustable mounting assembly consists of a first internally threaded hollow member anchored to the structural member. A second externally threaded member is mounted in the threads of the first member and the second member has a hollow interior space. A nut is magnetically mounted inside the interior space so that the nut may be moved in all directions both perpendicular to and along its axis in order to make proper alignment with a bolt mounted in a building frame.
Abstract:
An improved interference fastener includes a metallic shank having waves for interfering with the inner surfaces of holes formed in metallic members to be interconnected by the fastener. The waves have an amplitude of between 0.001 and 0.004 of an inch and include a series of protuberances or crests which interfere with the metallic members. This interference improves fatigue life by prestressing the members around the holes to thereby reduce the variation in stress or load span to which this area is effectively subjected when a varying or alternating load is applied in the members. In addition, the interference retards relative movement between the fastener and the members. The waves also provide a series of circular recesses or troughs having bottom or innermost portions which are spaced from the members to reduce metal-to-metal contact between the fastener and the members.
Abstract:
A self-retained bolt which may include a head, a shank having threads thereon, a pawl mounted for generally radial movement within the shank and means for biasing the pawl radially outwardly. A nut can be threaded onto the bolt for cooperation therewith in securing together two or more members. The pawl acts in various ways to prevent inadvertent separation of the nut and bolt and/or the bolt and the members being fastened together.