Abstract: A lock nut having a plurality of sides having a radius crimp which is consistent with the radius of the threaded bore in the lock nut. Preferably, the lock nut is crimped using a three sided die, each die having a radius crimp with relief angles. The relief angles are provided at a desired angle to result in the desired amount of contact area between the lock nut and the die. The device includes a housing, and the housing includes at one end a threaded bore which is configured to mount on a ram. An opposite end of the housing provides a tapered die section in which the three sided die is disposed. The three sided die is engaged with a locking die base which is movable within the housing.

Abstract: A relatively low cost, lightweight and thermal stress-free mechanical fastener system having particular application for reliably joining together high temperature structural members (e.g., a pair of flat fiber-reinforced ceramic composite plates). The mechanical fastener system includes a ceramic composite fastener having a semi-circular head at one end to be countersunk in the structural members to be joined together and a dove tail retention feature formed in the shank or root at the opposite end. The composite fastener has a 2-dimensional (i.e., flat) profile that facilitates an economic manufacture thereof from densified ceramic composite material. A matched pair of thread forms having external threads and an internal dove tail relief to match the dove tail retention feature at the root of the composite fastener is held in face-to-face mating engagement with one another so as to establish a mechanical interlock around the root of the composite fastener.

Abstract: A blind type fastener for securing a plurality of workpieces is provided that has a sleeve, a pin member and a drive nut. The sleeve has a body that is internally threaded along a portion of the sleeve, a head positioned at one end of the sleeve and an internally unthreaded deformable tail portion positioned at the other end of the sleeve that is integrally connected to the sleeve. The head of the sleeve has a plurality of recesses disposed threreon. The pin member is adapted to be disposed within the sleeve and has a breakneck groove that is adapted to fracture at a position that is flush with an outer surface of the sleeve head. The drive nut has a plurality of projections positioned on one end of the drive nut that are adapted to be disposed in the plurality of recesses disposed in the head of the sleeve.

Abstract: A joint structure including a nail plate having an imperforate central region and being provided between two bearer components, and a plurality of nails adapted to extend through a first of the components, the imperforate region of the nail plate, and into the other of the components. The joint structure further provides a pallet having at least two laterally spaced bearers, and a plurality of laterally extending support boards extending over and being secured to an upper surface of each bearer. The pallet may also include a base having a plurality of laterally extending base boards extending under and being secured to a lower surface of each bearer. The support boards and base boards are in the form of elongated boards and, while successive support boards can abut, they preferably are slightly spaced apart.

Abstract: A threaded member such as a bolt, nut, or pipe has a threaded portion on a body of the member. The threaded portion of the member includes a first threaded section, a second threaded section, and a third threaded section. The first and third threaded section have standard threads which comprise standard roots, flanks, and crests. The second section is between the first and third sections and has threads in which a portion of the threads are raised relative to the standard threads to define bumps. The raised sections or bumps comprise a raised root, a raised flank, and a raised crest. The raised root and raised crest define diameters different from the diameters of the standard root and standard crest, respectively. In a exteriorly threaded member, the raised root and crest have diameters greater than the diameter of the standard root and crest, respectively. In interiorly threaded member, the raised root and crest define diameters smaller than the diameters of the standard root and crest, respectively.

Abstract: The hardness of the outer peripheral surface of a small-diameter portion 47 and one side surface of a collar portion 52, which respectively rub against a belleville spring 39a, is set at HRc45 or higher, thereby enhancing the wear resistance of these surfaces. On the other hand, the hardness of a fastening tubular portion 51 is set at HRc3O or lower, thereby making it difficult for the fastening tubular portion 51 to be damaged or cracked when it is fastened.

Abstract: A nut free from inadvertent loosening has an annular lug with a plurality of generally upright grooves formed in an outer peripheral surface of the annular lug at angular intervals so as to divide the annular lug into a plurality of wall segments. Each wall segment is interposed between two upright grooves. At least one of the wall segments is depressed centripetally to reduce its radius, with the other segments remaining undepressed. The annular lug is integral and coaxial with a base which is engageable with a driver. An internally threaded bore is formed through the nut around a central axis thereof. The annular lug provides an upper zone of the internally threaded bore. The internal thread is continuous from end to end and is not intersected by the vertical grooves. The inner radius of each depressed wall segment is less than the inner radius of the undepressed wall segments. The outer radius of each depressed wall segment may be greater than or less than the outer radius of the undepressed wall segments.

Abstract: An improved adjusting sleeve for connecting together a pair of opposite, generally-collinear threaded rods, as may be found in automotive front-end suspensions, includes an elongate, tubular body. While the sleeve may comprise differing numbers of surfaces prior to and subsequent to a longitudinally-nonuniform crimping operation performed on each of its longitudinal ends, in a preferred embodiment the sleeve forms a modified octagon when viewed in lateral cross-section, including six wrenching flats extending along its entire length. A longitudinally-nonuniform crimping operation serves to radially inwardly displace the longitudinal end portions of each of the full-length diametrical crimping flats which otherwise complete the body's octagonal shape in lateral cross-section. The resulting localized deformation of the bore formed in each of the body's longitudinal ends achieves a consistent a prevailing torque without inducing connector "wobble.

Abstract: A mounting system for removably mounting the lower flange of a control rod guide tube over an opening in the upper core plate of a nuclear reactor includes support pins having first and second pin portions. The first pin portion passes through the guide tube flange and has an externally threaded section. The second pin portion is secured within the bore of the upper core plate and has a solid body section and a split-leaf section. The solid body section has an outer diameter which is accommodated in the bore by a close clearance fit. The split-leaf section has a split intermediate section and a split end section. The split intermediate section extends from the solid body section, has an outer diameter which is less than the outer diameter of the solid body section, and tapers uniformly between the solid body section and the split end section to form a conical shape. The split end section biasingly engages at least a portion of the bore wall.

Abstract: A lock nut has locking members with internal thread segments formed between slots, the segment ends being relieved to prevent galling; also, the members are deformed so that thread segments therein extend along generally circular arcs that have axes offset from the nut axis. Typically, the axes associated with the arcs on said members are at the respective sides of the body axis opposite from said respective members.

Abstract: In a blind fastener (20) of the kind comprising a tubular nut (22) having shank (28) with a head (30) at one end and a tapered nose (32) at the other end, a headed bolt (24) threadedly engaged in the bore (34) of the nut (22), and an expansible sleeve (26) which, by rotating the bolt (24), can be forced on to the nose (32) to form a blind head, a section of the shank (28) of the nut (22) is formed with a single protuberance (42) which protrudes resiliently into the bore (34) sufficiently to interfere with and restrain rotation of the bolt in the nut, and thus render the fastener self-locking. The shank (28) may have more than one section provided with a single such protuberance (42), the effect of several protuberances being additive. Each protuberance (42) lies entirely within a minor sector of its section of the shank, and presents either a flat or a curved threaded surface traversed by the thread (38). Protuberances may be in different sectors if spaced longitudinally of the shank.

Abstract: A self-locking screw-nut assembly is provided characterized in that the screw (2) has one or more median threads (4) of reduced diameter, whereas the nut (1) is designed to be deformed locally by an external action at the level of these reduced diameter threads after tightening to the desired torque, so that the displaced metal fills the gap (7) left free between the inner thread of the nut (1) and said reduced diameter threads (4) of the screw (2).

Abstract: To attach a nut to a plate-shaped workpiece, especially to a metal sheet, in such a way that it has self-locking properties without additional aids or parts, the force fastening the nut and acting on a free thrust surface of the nut is divided into at least two effective components generating a shearing stress in the nut material, transverse deformation of a part of the nut facing away from the workpiece being produced, and the thread diameter in the thread region deformed for self-locking purposes being reduced, while at the same time the thread pitches are inclined towards the center axis. A nut which can be used either as a locking nut or as a non-locking nut is characterized by a force-deflecting design of the thrust surface.

Abstract: To attach a nut to a plate-shaped workpiece, especially to a metal sheet, in such a way that it has self-locking properties without additional aids or parts, the force fastening the nut and acting on a free thrust surface of the nut is divided into at least two effective components generating a shearing stress in the nut material, transverse deformation of a part of the nut facing away from the workpiece being produced, and the thread diameter in the thread region deformed for self-locking purposes being reduced, while at the same time the thread pitches are inclined towards the center axis. A nut which can be used either as a locking nut or as a non-locking nut is characterized by a force-deflecting design of the thrust surface.