Abstract: For achieving improved securing effect in use with oil or wax coated contact surfaces, a self-locking resilient or non-resilient element, such as a spring-ring or a washer, has wall-like protrusions extending on each major surface from the inner to the outer boundary, and recesses lying therebetween, the protrusions each having a plateau-like upper surface which, viewed in cross-section along the peripheral direction of the element, is curved concavely in order to form edges lying in the region of the plateau boundaries, the edges being formed as scraping edges. The wall-like protrusions extend radially in a zig-zag manner from the inner boundary to the outer boundary of each major surface, and each of the recesses lying between the protrusions forms a zig-zag-shaped continuous channel, open in the region of the inner and outer boundaries in order to achieve a drainage effect.

Abstract: A fastener for attaching sheet metal or articles to sheet metal. The fastener is a self-locking sheet metal screw having a plurality of equally spaced teeth formed within a recess beneath the fastener head during the heading operation. The teeth preferably have curved trailing edges and straight or slightly inclined leading edges, and each extends laterally a different distance from the shank, as well as vertically a different distance along the shank, such lateral and vertical distances on a single tooth being equal.

Abstract: A self-piercing adapted to be affixed to a metal panel. The nut includes a substantially rectangular body, with a pilot portion provided at the center of an upper surface of the body, which pilot portion is defined by a circumferential side wall which is slightly converged toward an upper surface of the body. The pilot portion includes a punching face disposed around the threaded bolt accommodating hole. Seat faces are provided at each corner of the body, with each seat face being defined toward the pilot portion by a wall spaced from the circumferential side wall of the pilot portion but facing the same. A top level of the seat faces is slightly lower than that of the punching face of the pilot portion. A recess is defined by a space lying between the pilot portion and the seat faces. The recess is opened to continue each side of the rectangular body between adjacent seat faces.

Abstract: A self-locking fastener having a bearing surface comprising a plurality of sets of serrations arranged to penetrate a workpiece such that, while a resistance to the loosening of the fastener from the workpiece is created, the marring of the workpiece surface is minimized. Use of the fastener is particularly advantageous if the workpiece consists of soft materials such as cast-aluminum or non-heat treated carbon steels. Each set of serration, when viewed as a profile, includes a downwardly inclined surface, a relatively deeper serration and a relatively shallower intermediate serration. The intermediate serration controls the depth of the penetration into a workpiece.

Abstract: A self-clinching fastener of the type for connection to a workpiece comprising sheet material, includes a head and a shank, with a groove formed in the shank, with the head being embeddable in the sheet material to displace material thereof into the groove to form a mechanical interlock between the material of the sheet material and the fastener. The head includes a plurality of radially disposed projections extending axially outwardly of an undersurface thereof and intermediate the undersurface and the groove. These projections each include an axially facing recess therein, such that the material of the workpiece being displaced will flow into the groove and the recesses in the projections, to lock the fastener to the workpiece. The shank may also include an extruding portion to resize an aperture in the sheet material, prior to the deforming of said sheet material by said head.

Abstract: An improved fastener has a head section and an axially extending shank section. A thread convolution is disposed in a coaxial relationship with the head and shank sections. An improved holding action against rotational and axial movement of the fastener relative to a metal base member is promoted by a plurality of radially extending wedge-shaped compression ramps. The compression ramps are disposed on the head section and slope radially and axially inwardly toward the shank section. The compression ramps are effective to force metal of the base member into an annular groove which circumscribes and undercuts at least a portion of the shank section. The metal which is received in the undercut portion of the groove is effective to hold the fastener against being pushed or pulled axially outwardly from the base member. The compression ramps also force the metal of the base member radially inwardly against corners formed on the shank section of the fastener to hold the fastener against rotation.

Abstract: A rotary fastener is disclosed for use in attaching the first panel to a second panel. The fastener has a head and a shank, which shank has at least one helical thread thereon. Additionally, there is at least one helical ramp extending along the shank from the underside of the head. The underside of the head has a generally annular recess which may have helical ribs therein. The fastener is dimensioned so that as it is driven into the two panels, material of the two panels is drawn up into the recess and binds on the helical ramp along the shank. Additionally, a plurality of nibs located on the underside of the head and extending into the recess "rake" up material as the underside of the head encounters the top panel, which raked material is also drawn into the recess and binds on the helical ramp. This combined binding action by panel material and raked material significantly increases stripping torque of the fastener during installation.

Abstract: A throttle valve shaft projecting from a boss on an internal combustion engine throttle body has a nut which is adjustable for establishing a selected clearance between the nut and the boss to thereby limit end float or axial displacement of the shaft. A lever or other retainer secured to the shaft has an interfering engagement with the nut to prevent rotation of the nut about the shaft and thereby maintain the selected clearance between the nut and the boss.

Abstract: A load indicating flange is provided either separately or on a nut or a bolt head. This load indicating flange has an axially directed face which has a wavy surface on which a plurality of crests are disposed for initial engagement with a work surface. A plurality of troughs are provided on the wavy surface one each between two of the crests. A gauge groove is provided at each trough and when the bolt and nut combination is properly tightened on a workpiece, the troughs are flattened toward the work surface to such an extent that a relatively thick gauge cannot enter the gauge groove. If the bolt and nut are improperly tightened, then the gauge will enter the gauge groove. A narrow band peripheral bearing surface is provided on the outer periphery of the face to prevent defacing the work surface.

Abstract: A screw adapted for use with thin sheet metal. The screw has a threaded shank and a head with an integral flange. The flange has both radial and axial undulations which increase the amount of torque required to strip the screw. The undulations are formed at the outer edge of the flange and on the under surface of the flange and are adapted to engage a workpiece upon threaded advancement of the screw.

Abstract: A joint of the type made between two elongated frame members and including also a connector member releasably coupling the two frame members tightly one against the other. This joint is characterized by its exclusion of special machining and construction of the components, by the connector member being unconspicuously concealed and by the possibility of assembling one frame member in any angular relationship about its longitudinal axis relative to the other frame member.

Abstract: This invention relates to a bushing structure having a bushing (1) and a polygonal flange (2) said flange initially being formed with a circular circumference (5) having an outer diameter equal to the diameter of the inscribed circle (14) of the polygon to be made whereafter by means of cold deformation the material of the flange at the location of the angles of the polygon to be made is forced to flow outwards by means of a die pressed into the flat surface of the flange, the die having projections, the inner surfaces of which are steep with respect to the axis of the die and the bottom surface of which run obliquely and arching by upwards and outwards the radial width of said projections decreasing from the center to both sides.

Abstract: An improved fastener has a head section and an axially extending shank section. A thread convolution is disposed in a coaxial relationship with the head and shank sections. An improved holding action against rotational and axial movement of the fastener relative to a metal base member is promoted by a plurality of radially extending wedge-shaped compression ramps. The compression ramps are disposed on the head section and slope radially and axially inwardly toward the shank section. The compression ramps are effective to force metal of the base member into an annular groove which circumscribes and undercuts at least a portion of the shank section. The metal which is received in the undercut portion of the groove is effective to hold the fastener against being pushed or pulled axially outwardly from the base member. The compression ramps also force the metal of the base member radially inwardly against corners formed on the shank section of the fastener to hold the fastener against rotation.

Abstract: A workpiece support bearing for modular chuting for passing the workpiece along the chute is disclosed. The chute of the present invention includes a pair of side walls secured in a spaced apart manner by a plurality of clips attached to upper and lower edges of the side walls. Wear members are disclosed that are selectively secured to the walls of the chute or to the clips to reduce friction and wear from parts moving along the chute.

Abstract: A pipe hanger between whose legs a joint member is inserted and held by the force of a bolt. Both a rigid connection of the joint member with the pipe hanger and a slipping connection of the joint member with the pipe hanger is achieved enabled by spiral ridges of teeth which in the case of the rigid connection engage and in the case of the slipping connection glide upon each other.

Abstract: A reversible lock washer having oppositely disposed cam surfaces adapted for use in combination with a threaded fastener of the type wherein a screw head or nut includes at least one cam surface arranged to engage at least one cam-engaging surface of the reversible lock washer, the cam surfaces of the washer being formed on the inner recessed ring of the washer body. The washer body includes an outer raised peripheral ring having a frictional surface formed on the opposite sides thereof, whereby the washer body is provided with a pair of identical cam and frictional surfaces, thus allowing the washer to be positioned randomly between the engageable cam surface of the nut or screw head and the respective workpiece which is engaged by the frictional surface of the outer peripheral ring, and wherein one arrangement of the nut includes two oppositely disposed reversible cam surfaces, whereby it too can be randomly positioned over the reversible lock washer.

Abstract: A plastic plate is provided for use with a fastener to secure insulation to a metal roof deck. The plate has a planar portion having a centrally disposed tapered hub portion. The central opening and preferably a clear through hole extends in the plate in the area of the hub. The bottom of the plate includes anti-rotational means for engagement with the insulation during driving of the fastener. The anti-rotational means may be associated with the bottom of the planar portion, the hub or both. The fastener may include two separate and spaced apart threaded portions so that as the fastener first engages the metal deck, the unthreaded portion is within the previously tapped hub portion.

Abstract: A self-locking fastener, particularly a nut, a bolt, a screw or a similar element, and a stamp or male die respectively for making said fastener, said fastener and stamp respectively being provided with teeth at its bearing surface or working surface respectively.The fastener and stamp respectively is characterized in that the teeth are located in a number of separate groups, that the teeth in each group are mutually parallel and that the height of the teeth remains equal over their complete length and is greater than the axial distance between the bearing surface and working surface respectively and the roots of the teeth.

Abstract: A fastening device includes a body having an engaging surface and threads concentric with the rotational axis of the body. The engaging surface has formed therein a plurality of ratchet-like projections having a sawtooth-type circumferential cross-section. Each projection includes a first radially outer edge and a second radially inner edge which together define a leading point which forms a most prominent portion of the projection. All of the points are located on an imaginary circular line and facing in the direction of loosening of the fastening device. Each first edge extends outwardly from the circular line in a direction inclined to the radial, and each second edge extends inwardly from the circular line in a direction inclined to the radial. The circular line is positioned nearer the inner periphery of the engaging surface than the outer periphery thereof.