Abstract: It is an object to provide a locking bolt, which is capable of tightly fixing a member or the like at an extremely high degree of firmness without being loosened even when vibrations are repeatedly applied thereto, and is manufactured in an extremely facilitated manner. The locking bolt includes: a shank section (1) threaded on an outer circumference thereof; and a head section (2) provided at one end of the shank section (1). The head section (2) includes: a main body portion (201) having a hexagonal cross-sectional shape; and a cylindrical skirt portion (202) provided continuously with the main body portion (201) and formed so as to be spaced radially outward from the main body portion (201) in an expanding manner along a concave surface using a catenary curve surface.

Abstract: A hybrid fastener comprises a composite body having a tip, and a metal sleeve surrounding and locked to the tip.

Abstract: An anchor bolt for an expansion anchor, and a method of producing the anchor bolt, is disclosed. The anchor bolt has an expansion body which is arranged coaxially with respect to an axis, where a circumferential surface of the expansion body has ribs and grooves in an alternating manner in a circumferential direction. Top surfaces of the ribs diverge from the axis in a direction along the axis. Bottom surfaces of the grooves converge in the direction of the axis.

Abstract: A bolt (10) for securing timber to any other material, comprises: a bolt head (101) with a series of spiked teeth (102) on its underside; a cylindrical bolt rod (103) extending from the bolt head (101) is threaded and split into two rods (105a,b) at its free end, so as to define a slot (106) therebetween. In use a user drills a hole through pieces of timber to be secured together, and hammers the bolt through the hole. The spiked teeth on the bolt head lock into the timber, securing the bolt at one end. At the free, split end of the bolt rod, a washer and nut are tightened onto the bolt. A cold chisel is hammered into the slot between the split ends of the rod, bending the ends outwards and thus preventing the nut from loosening.

Abstract: An anchor stud includes a stud portion including a body portion having a first end that extends to a second end though an intermediate portion. A wedge member is operatively coupled to the second end of the stud portion. The wedge member includes a body having a generally frustoconical profile and is formed from a material having a Vickers hardness greater than about 220 HV. A sleeve element is positioned on the stud portion at the second end adjacent the wedge member. The sleeve element is formed from a material having a Vickers hardness greater than about 220 HV.

Abstract: The invention relates to a functional element in the form of a press-in element for attachment to a sheet metal part, wherein the functional element has a head part and a shaft part, the head part has a ring-shaped sheet metal contact surface at the side adjacent the shaft part and a ring-shaped axial recess inside this ring-shaped sheet metal contact surface and surrounding the shaft part at the transition from the head part into the shaft part. In accordance with the invention the shaft part has a plurality of circumferentially distributed radial recesses extending in the axial direction and between these noses which likewise extend axially and project radially, wherein raised material portions are present at the positions of the radial recesses at their axial ends adjacent the head part and form undercuts with the head part in the region of the ring-shaped recess.

Abstract: A ring bolt and a subassembly thereof; the ring bolt having a shank, a first fastening thread extending from a distal end of the shank and a helical ring extending from the fastening thread. The major diameter defined by the helical ring is greater than the major diameter defined by the fastening thread. A component to be captured together with the ring bolt in a subassembly has at least one inward projection in an opening therethrough to define a restricted entrance wider then the major diameter of the fastening thread but smaller than the major diameter of the helical ring.

Abstract: The invention relates to a method for producing a threaded insert having an internal and external thread which have different thread pitches or the same thread pitch, wherein the threaded insert is wound from a profile strip which, on the one side thereof, is pre-shaped with the profile of the external thread, and on the other side thereof, is pre-shaped with the profile of the internal thread, and to a threaded insert which is generated by means of said method.

Abstract: The object of the present invention is to provide a bolt, the axial force of which can be measured by a supersonic wave, or the like, with high accuracy and which can be manufactured in a shortened process. A bolt 1 having an angular polygonal shaped bolt head 2 is provided in the present invention. A recess 4 is formed on the bolt head 2 and a projection 5 having a plane upper face 6 is formed on the inner side of the recess 4, and at the end of the bolt shaft 3, a plane end face 8 is formed, and a wall, the outside of which being a C-face part is formed around the plane end face 8.

Abstract: Method for producing a locking ring bolt, a locking ring bolt, and a fastening device. The method includes pressing a holding geometry into a stationary blank. The locking ring bolt includes a shank having a holding geometry that includes radially peripheral grooves interrupted by at least one web. The fastening device includes a shank having a holding geometry that includes at least one radially peripheral groove interrupted by at least one web, and a locking ring comprising a sleeve shaped body defining an interior.

Abstract: A fastener element (16) has a head section (18), a threaded shank section (17) with threads (20) at a pitch and a distal end section (22). A retention device (24) is secured to the distal end section and is engageable with a fastener receiving member (14).

Abstract: A set of tooling for making pointed headed bolts of a given diameter in numerous lengths with roll thread ready threaded to the head and partially threaded shanks in a four forming station forming machine, the tools being configured to work on wire stock as received at the first station of a diameter larger than or substantially the same as the roll diameter and not greater than the nominal diameter of the bolt, including at least two sequential head forming tools for mounting on the slide, an extrusion pointing tool for mounting on the die breast, a roll diameter extrusion tool for mounting on the die breast and a head support tool mountable in a station on the slide at multiple axial positions corresponding to standard lengths of the bolts being made, the head support tool being arranged to work at either the extrusion pointing station or the roll diameter extrusion station.

Abstract: Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will engage the interference surface to create a “stick fit” engagement. The punch is formed using a wire EDM operation to construct tapered surfaces within the die cavity of a hob. The hob is machined down to obtain the desired depth, which is measured up from a gage spot indicative of the sticking point.

Abstract: The present invention relates to a method for manufacturing a bolt that includes an axis, including the steps of providing a metal rod, providing a die, extruding the metal rod through use of the die, cold forming the metal rod, at least in part, to provide a shaft and a head so that, the head includes a torque transferring structure, the head includes a flange located adjacent to the torque transferring structure, a generally cylindrical surface is located adjacent to the flange, and a sloping surface that extends from the generally cylindrical surface towards the axis, rolling a threaded surface into the shaft, and providing a plurality of grooves so that the grooves extend from an end of the bolt.

Abstract: A roof bolt comprises a shaft for insertion in a hole drilled in a mine roof and a head whereby the bolt may be rotated, the head being offset with respect to the longitudinal axis of the shaft so that when the bolt is rotated by means of its head the shaft is caused to describe a circle of greater diameter than its own diameter, and where the offset is at least 08 inch and not more than 0.25 inch. Preferably the offset is from 0.10 to 0.16 inch. The invention includes a method for the production of roof bolts which comprise a shaft for insertion in a hole drilled in a mine roof and a head whereby the bolt may be rotated, the method being characterised by being controlled so that at least 90% of the bolts produced have their head central axis offset with respect to the longitudinal axis of the shaft by an amount of at least about 0.08 inch and not more than about 0.25 inch.

Abstract: A method of making a UHMWPE body combined with a bolt, a cap screw, a reinforcing member uses a compression molding machine equipped with a male and female mold set. Particulate UHMWPE dispensed into the cavity of the female mold surrounds the head of the bolt and screw and reinforcing member. Pressure and heat applied to the particulate UHMWPE molecularly bonds the UHMWPE to the bolt, screw, and reinforcing member.

Abstract: A novel process of forming a member, process of forming an extruded and axially twisted member, such as a drill, a fastener, a self-drilling/tapping fastener, and the member formed by the process is disclosed. The process includes the steps of: providing a blank; extruding a predetermined shape along at least a section of the blank, thereby forming at least two first portions and at least two portions on the extruded section; forming a head on the end of the blank to define a head and a shank; and axially twisting at least a section of the first and second portions a predetermined amount. As a result of the twisting step, each first portion forms a spiral along the length of the twisted section and each second portion forms a spiral along the length of the twisted section. The first portions alternate with the second portions and each second portion defines a spiral groove for transporting material along the length of the shank. The resulting member can be threaded along all or a portion of the shank.

Abstract: A fastener and method of manufacturing a threaded fastener with a tool-receiving recess in the fastener head are provided including a gauging indicator for indicating whether the recess is properly formed to meet standards. The gauging indicator is preferably in the form of a protrusion of a predetermined size on the fastener head which changes when the punch forming the recess becomes worn or broken. In this instance, the protrusion will be reduced in size as the material of the protrusion is displaced into the fastener head and other material of the fastener head is pushed into the areas of wear or breakage on the punch. Accordingly, the size of the gauging indicator provides an indication of whether the recess is meeting standards.

Abstract: A method of manufacturing a connector bolt includes the steps of forming axial grooves on a part of the shank of the connector bolt, and then simultaneously performing a rolling process for thread formation around the shank part with the axial grooves formed thereon with a rolling tool and a different rolling process around a part of the shank without the axial grooves with a different rolling tool.

Abstract: The invention relates to thread formation and particularly to the formation of threads on deformed steel reinforcing rods. The method of forming a thread on the steel reinforcing rod comprises the steps of cold upsetting an end region (1) of a deformed steel reinforcing rod having a nominal diameter, the upsetting being arranged to increase the diameter of the end region to a new, upset, diameter greater than the nominal diameter, rolling a thread onto the end region (1) so as to produce a threaded region having a thread major diameter which is greater than the nominal diameter and a thread minor diameter which is less than the nominal diameter. The formation of such a thread enables the production of mechanical connections between pairs of rods, the connections having a strength greater than that of the rods being connected to one another.

Abstract: A fastener has a head and a shank with two ends. One of the ends includes the head while the other includes a pilot point. Also, the shank includes a threaded portion adjacent to the pilot point. A pair of recesses are formed 180.degree. from one another on the point and threaded portion. The recesses extend from the end of the point through at least a first full thread.

Abstract: A threaded fastener has an eccentric tip with a smooth portion, a threaded portion and a cleaning recess formed into the threaded portion of the tip. The recess and tip are formed in the heading operation prior to rolling the threads onto the shank which provides better thread quality.

Abstract: An improved railroad frog bolt-nut assembly is disclosed. The bolt has a square head and a shank. The shank has an unthreaded portion adjacent the head and a threaded portion at its terminal end. The threaded portion is rolled to a diameter equal to the shank's unthreaded portion to produce high fastener strength. A unitary lock nut is formed with an annular boss extending from its outside end in which indentations intersecting with some of the nut threads are pressed to provide an interference, locking fit with the bolt threads.

Abstract: The expansible metal anchor (1) for anchoring in a hole drilled in a component includes a shank part (2) and an expander cone (4) having a polygonal cross-section defining several faces (13) at its front end. On each face (13) of the expander cone (4) an expansible segment (5) is arranged spaced from that face by a gap (7) corresponding approximately to the distance (8) by which the expansible segments (5) project radially from the shank part (2). Each expansible segment (5) is joined to the shank part (2) at its end face directed towards the shank part (2) by web members (6, 6') constituting predetermined break points. As the expansible anchor is driven into the hole drilled in the component, the web members (6,6') break off, so that the expansible segments (5) are displaceable on the faces (13) of the expander cone.

Abstract: A self-clinching fastener is provided, of the type for connection to a section of sheet material having an aperture formed therein for receiving the fastener. The self-clinching fastener comprises a head portion and a shank portion having a smaller outer diameter than the head portion and extending axially from one side of the head portion. A displacement portion extends axially from the one side of the head portion extending radially outwardly of the shank portion. An undercut annular groove is formed inwardly of the displacement portion, extending axially in the direction of the head portion and radially surrounding the shank portion. A generally annular sizing ring is formed about the shank portion axially spaced from the one side of the head portion by an amount somewhat greater than the axial extent of the displacement portion. The outer diameter of the sizing ring is greater than the outer diameter of the shank portion and also greater than the inner diameter of the undercut annular groove.

Abstract: Reusable self locking fasteners, and methods of making the same wherein the self-locking characteristic is derived from a metallurgically bonded metal patch comprising a metal or metal alloy selectively applied to a specific region of the threaded surface of the metal fastener in a metal paste or powder form and fusing the same under heat. The metallic patch so achieved may comprise a single metal or metal alloy or a composite of metals or metal alloys selectively and metallurgically bonded to the threaded surface of the metal fastener by single or multiple metal paste or metal powder applications.The convex/concave curve of the fused metal having a radial thickness,1. that is greatest substantially midway between the two radial planes, and2. that gradually diminishes from the midway point as the material approaches the radial planes in order that the exposed surface of the material forms only a small angle to a tangent to the surface of the threads at the radial planes.