Abstract: Provided is a structurally stable interbody cage.

Abstract: A method of making an expansion anchor comprising the steps of: providing a metal rod having a thread along at least part of its outer surface; adapting the metal rod to obtain a required length of metal rod; welding an expansion section to an end of the obtained length of metal rod; and providing an expansion sleeve which in use interacts with the expansion section for increasing the expansion sleeve diameter. An expansion anchor comprising a threaded rod part, an expansion section welded to an end of the rod part and an expansion sleeve which in use interacts with the expansion section for increasing the diameter of the expansion sleeve.

Abstract: A high capacity radial-fit coupling bolt (or “expanding sleeve bolt”) has a pair of tapered sleeves about a shank of a bolt to which can be applied a tensioning load. An extrudable ring, or a compression ring, is interposed between a head nut or head flange at one end of the shank, and one end of an inner sleeve. A tensioning load is applied to the shank, the inner sleeve causing the outer sleeve to expand diametrically. At a preset load limit, the extrudable ring is extruded through at least one bore in a drive piston between the head nut and the extrudable ring, to allow shank to move relative to the inner sleeve until the tensioning load is fully applied. Alternatively, a drive member is provided between the head nut or head flange and the compression ring, and at a preset limit, the compression ring allows the shank to move relative to inner sleeve until the tensioning load is fully applied. The preset limit will typically correspond to the force required to fully expand the outer sleeve.

Abstract: Double-acting hydraulic actuating cylinder, particularly for hydraulic steering devices of outboard marine engines. The cylinder is slidably mounted on at least one rod coaxial to the cylinder sealingly protruding from at least one head of the actuating cylinder and carrying a separating piston that divides the cylinder into two variable volume chambers, each one of such two chambers has an inlet/outlet for the hydraulic fluid, each connected to one of two inlets/outlets of the pump and a sealing head for the relative sliding between the cylinder and the rod, which sealing head is integral with the cylinder itself. The rod is provided to be connected to a fastening bracket to fasten the cylinder to the engine, in a not slidable manner and in such a way as to allow the relative rotation of the engine with respect to the transom along an axis parallel to the axis of the rod.

Abstract: An example mounting assembly includes a fastener receivable within an aperture of a component. A felt metal gasket separates the fastener from the component.

Abstract: A disc brake assembly having a guide pin disposed in a bore of an anchor bracket such that a guide pin axis is offset relative to a bore axis whereby there is provided at least one defined point of contact between only a portion of the guide pin and a portion of an inner surface of the bore. The guide pin includes a groove formed therein, the groove defines a groove axis which is offset relative to the guide pin axis, and a resilient member is disposed in the groove which is operative to bias the guide pin in the bore such that the guide pin axis is offset relative to bore axis to provide the at least one defined point of contact between only a portion of the guide pin and a portion of the inner surface of the bore.

Abstract: A fastener comprises a shaft extending along a longitudinal axis, and a sleeve wrapped partially around the shaft. The sleeve comprises an inner surface adjacent the shaft, an outer surface, an upper extent, a lower extent, a first circumferential extent, a second circumferential extent, and a gap extending longitudinally from the upper extent to the lower extent and separating the first circumferential extent from the second circumferential extent. The sleeve has a first thickness adjacent the first circumferential extent that is less than a second thickness between the second circumferential extent and the first circumferential extent. A cross-sectional centroid of the shaft between the upper extent and the lower extent is in substantially the same location, with the sleeve in different first and second rotational positions.

Abstract: A reverse wedgelock device with multiple draw blocks disposed about a lead screw passing through the draw blocks, wherein the draw blocks may be compressed together and caused to displace about respective wedge surfaces upon tightening of the screw. Compression and displacement of the draw blocks can function to draw anchors associated with the draw blocks inward, which, when engaged with opposing objects, functions to draw the objects together.

Abstract: A concrete anchor point system provides for an anchor point, a receptacle for embedding into a concrete structure for removably receiving the anchor point, and a tool for remotely installing the anchor point in the structure, or removing the anchor point from the structure. The receptacle is preferably tapered, and an anchoring end of the anchor point is preferably tapered to match.

Abstract: A fixture for mounting on a support structure having an outer surface and an inner surface defining a thickness, with a bore therethrough, comprising: a tubular body, having a top section and a bottom externally threaded section; a retaining collar, having an upper portion, the bottom surface thereof larger than the bore, and a circular internally threaded lower portion smaller than the bore; a keeper body, having an internally threaded circular passageway, including a ring shaped upper part having an outside surface and an outside diameter slightly smaller than the diameter of the bore, and a lower part having a smaller diameter than said upper part, the retaining collar and keeper body sized for threading onto the tubular body; and pivotable, rotatable ears having an upper edge and a lower end providing a stop, mounted to the upper part of the keeper body.

Abstract: Disclosed are various wedges that may be used in a restrainer bracket of a jet pump assembly. The jet pump assembly may include a restrainer bracket having an upper bracket and a lower bracket connected to an inlet mixer. A wedge may be provided between the upper bracket and the lower bracket and a wedge rod may pass through a slotted hole of the wedge. Ends of the wedge rod may be attached to the upper and lower brackets. The restrainer bracket may further include a yolk-like member which surrounds the inlet mixer and is connected to a riser pipe. The wedge may include an inclined surface which is configured to engage with a restrainer bracket pad of the yolk-like member. The wedges may further include inner curved surfaces which contact the wedge rod and the inner curved surfaces may be part of an insert that may be inserted in the wedge.

Abstract: A bicycle expander basically includes an expander body, an expanding structure and a positioning shoulder. The expander body has a cylindrical shape and being capable of varying an effective diameter thereof. The expanding structure is operatively connected to the expander body to vary the effective diameter of the expander body. The positioning shoulder extends from an axial end portion of the expander body, the positioning shoulder including an abutment protruding a radially outward direction with respect to the expander body.

Abstract: An anchor bolt assembly having a generally cylindrical grip end spaced from an actuating end. The grip end has two relatively movable mating portions each having at least one complementary ramp surface. The actuating end is used to move a movable mating portion relative to a fixed mating portion in a longitudinal direction. Actuation will cause the movable mating portion to slide relative to the static mating portion and apply radial pressure at the grip end of the anchor bolt assembly remote from the actuating end. The grip end has a roughened surface on the static mating portion while the movable mating portion is smooth. The anchor bolt assembly is particularly suitable for use in tapered holes formed in concrete.

Abstract: An anchor bolt for use in a hole in a base material is provided and includes a stud, a sleeve disposed about the stud and a retainer nut, disposed in operable communication with the stud and having a dimension measured from a central axis of the hole that is at least as large as a corresponding dimension of the hole.

Abstract: An anchoring device for insertion in a hole provided in a structure such as a wall (hollow or solid) comprises proximal and distal sections. The proximal section includes a head defining an aperture for receiving a fastener, and the distal section includes a pair of expandable wings displaceable between collapsed and expanded positions. Each wing is biased towards its expanded position such that the wings can engage the structural material delimiting the hole or a distal surface of the structure. The distal section comprises, proximally of the wings, a variable-length flexible portion for allowing the wings to engage the distal surface of the structure for various structure thicknesses. The distal section comprises, distally of the wings, a tip section adapted to spread outwardly when engaged by the fastener. The proximal section comprises a pair of legs each having a toothed rack for engaging the structural material.

Abstract: A wedge anchor comprising a barrel having a wedge receiving face opposite a rod receiving face, a passage extending therethrough between the wedge receiving face and the rod receiving face, the passage narrowing toward the rod receiving face and having an axial cross-sectional profile defining a convex arc; and, a plurality of wedges insertable into the passage, each of the wedges having a respective inner wedge face for defining a rod receiving passage for receiving a rod and an outer wedge face, opposite the inner wedge face, in axial cross-section having a profile complementary to the convex arc.

Abstract: Support devices are adapted for use to releasably attach mounting items to structures constructed of brick, stone, concrete or cinder block, or other comparable materials. The devices have expander and support portions. The expander portion have two inter-fitting wedge members which slidably and adjustably engage with each other for adjustable insertion and fixation within gaps, such as mortar joints between bricks, stones or blocks. The support portions removably attach to the expander portions, and have support members in the form of hooks, clips, pegs, and the like.

Abstract: A special anchoring device called a SPECIAL REUSABLE ANCHOR. This device is used to mount and secure various objects to a structure of masonry, concrete, wood, metal, gypsum wallboard, and the like. After the secure connection or attachment, the device may be released and reused if desired. This removal does not damage or weaken the structure or anchor device. The device is comprised of several structural members namely a fastener with various top portions or “heads”; a free wedge portion with a non-threaded aperture; and, a threaded wedge means for securing and connecting the SPECIAL REUSABLE ANCHOR to a structure. While the three main members are securely connected to the structure, the overall device has a means to release and reuse the SPECIAL REUSABLE ANCHOR for other connections without significant damage to the structure.

Abstract: An expansible anchor is adapted for inserting into a hole formed with a structure. The anchor includes a load cable and a first chock attached to an end of the load cable. A second chock resides adjacent to the first chock, and is adapted for movement between an anchor-contracting position and an anchor-expanding position. In the anchor-contracting position, the anchor is readily inserted into and removed from the hole of the structure. In the anchor-expanding position, the anchor is locked inside the hole of the structure. A chock-release column bears against at least one of the first and second chocks and has an enlarged head adapted for locating outside of the hole. The enlarged head defines a striking surface adapted for receiving a sudden force. This force is transferred through the chock-release column to the first or second chocks, such that the second chock is movable from the anchor-expanding position to the anchor-contracting position to thereby dislodge the anchor from the hole of the structure.

Abstract: The present invention provides a linear locking set screw system capable of rapid linear engagement and disengagement. More specifically, the system utilizes a threaded outwardly expandable set screw and an expander member which are constructed and arranged to thread easily into a threaded aperture while in a first release position and can thereafter be securely locked in place and/or provide a secondary clamping force in a second engaged position. In this manner, the linear fastener system is capable of providing a precise, secure, and reproducible connection between multiple components without the need to apply rotational torque to the assembly.

Abstract: The invention provides an installation tool for use with a battery operated drill or a corded electric drill for repetitive installation of caulk-in anchors. The installation tool utilizes the mechanical advantage of a threaded shaft to improve consistency of the holding reliability of the caulk-in anchor and controls the anchor setting process to insure proper installation while reducing installation time. The installation tool does not rely on bottom setting or a hammer strike to set the anchor, but can be set at a depth independent of hole depth. In one embodiment, the tool can be used with a through hole in the substrate and uses a combination of a threaded shaft and a controlled sensing spring to insure a more uniform installation of the anchor within the substrate across the entire length of the sleeve portion of the anchor, along with a visual check of proper setting of the anchor.

Abstract: A method for manufacturing a nail efficiently at low cost without a loss of material. The nail includes two legs bound together by a washer. One of the legs has a protrusion such that when the other leg is driven, it will spread by riding on the protrusion. In this method, a round rod stock is pressed except a portion thereof to form a head at one thereof, a trunk portion having a semicircular section with a flat surface between the head and the portion, and a tip portion at the other end of the rod stock. The portion forms the protrusion. The one of the legs is thus formed. The protrusion may be formed by pressing the rod from both sides.

Abstract: A top guide assembly for securing a top guide to a shroud which enables the top guide to be remotely removed without removing any other parts of the shroud or the core support structure is described. In one embodiment, the top guide assembly includes a hanger for being secured in a groove formed in an inner surface of the shroud, and the hanger includes a ledge having a plurality of openings therein. The top guide rests on an upper surface of the ledge. The assembly also includes wedges for being positioned in pockets formed in the top guide and tightly fit between the hanger and the top guide, and threaded studs for extend through respective aligned bores in the wedges and openings in the ledge. A nut and a keeper are engaged to one end of each stud to retain the wedge between the hanger and the top guide grid.

Abstract: An arrangement for insulating a wall of a metallic combustion chamber is disclosed. A layer of insulating material is applied to the metallic wall and a plurality of ceramic wall panels are applied over the ceramic insulation material. The wall panels are retained by fastening elements that pass through an opening in the wall panels. The opening in the wall panels has a frusto-conical surface and the engagement surface of the fastening element is at least partially spherical to avoid mechanical and thermal stresses.

Abstract: The apparatus is for engaging a generally cylindrical borehole, and includes first and second chock portions, the first chock portion being generally spherical, the second being a trough-shaped wedge. The wedge-shaped second chock portion has a thinner end and a thicker end, and first and second primary surfaces. The first primary surface is cylindrically convex and dimensioned to seat flush against the wall of the borehole. The second primary surface is shaped as a concave, inclined trough dimensioned to permit the spherical first chock portion to slide freely therewithin. A primary tether affixed to the first chock portion is used to position the apparatus in the borehole, and includes a loop from which a user's body weight or gear may be suspended. A chock control cable operable with a finger pull bar is affixed to and operable to move the second chock portion in the borehole, lateral to the first chock portion. Sheaths protect and separate the primary tether and the chock control cable from one another.

Abstract: A device designed for temporarily mounting an object to a tubular rod holder. The device consists of a pair of engagement sleeves, each having an inclined plane defining one end. The engagement sleeves are oriented such that the inclined planes complementarily engage one another. A rod extends axially through the engagement sleeves, being fixed to one of the engagement sleeves and extending beyond the end of the other engagement sleeves for supporting an object. When a nut is tightened to force the two engagement sleeves against one another, the inclined planes cause the cylinder to shift laterally and firmly engage the inner wall of the tubular rod holder.

Abstract: An expansion dowel including an expansion sleeve (2, 22) radially expandable upon being compressed and having a slot (5) extending along an entire axial length of the expansion sleeve (2, 22) and inclined toward an axis (A) of the expansion sleeve (2, 22), with a respective edge region (6, 7) of the slots extending beyond a respective end surface (8, 9) of the expansive sleeve (2, 22) in an unexpanded condition of the sleeve, and an arrangement (2, 52, 53; 51; 23, 24, 25, 26) for retaining the expansion sleeve (2, 22) in its axially compressed and radially expanded condition.

Abstract: A wall anchor having a first inclined plane secured to a second inclined plane by a connector. The connector is resilient to allow the inclined planes to move relative to one another. The inclined planes are oriented opposite one another, in a manner which increases their combined height as the inclined planes slide in a first direction relative to one another, and which decreases their combined height as the inclined planes slide in a second direction relative to one another. A retainer is secured to the first inclined plane and is used to insert the inclined planes into a hole in a wall. After the inclined planes have been inserted, the retainer is withdrawn slightly, which causes the inclined planes to slide relative to one another and increase their combined height to wedge the inclined planes against an interior surface of the hole. In this manner, a retainer may be securely and manually anchored to a wall.

Abstract: A serpentine shaped wire clip is disposed in a tapered bore of a housing for axial displacement in the bore and has in a preferred embodiment three U-shaped loops interconnected by end portions. The clip has a bore dimensioned for receiving a cable or rod in radial resilient compressive engagement along the clip entire length which engagement causes the clip to axial displace with the displacement of the cable or rod. The axial displacement of the clip in the tapered bore wedges the clip to the housing and cable or rod locking the elements. The clip may have any number of loops and wire diameter. Also, the housing may have a cylindrical bore and the tapered region may be formed on a rod or bar. The clip may be locked to smooth and grooved surfaces including threads. The housing and rod each have a different one of a cylindrical surface and tapered surface. The clip radially grips the cylindrical surface while wedging in response to relative displacement of the tapered surface to the cylindrical surface.

Abstract: Long and short legs have heads and pointed tips, respectively. They are joined together near their tips by welding. An upper portion above the welded portion of the long leg is formed with a cut extending obliquely upwards toward the short leg so that a thin breakable portion is formed in the long leg between the end of the cut and the contact surface with the short leg. A washer for clamping the legs above the cut is provided. When the nail is driven, the legs will not spread until the head of the short leg abuts the washer. When the head abuts the washer, the long leg slides outwards and spreads apart from the short leg near the cut. The breakable portion will thus get broken and the nail will spread.

Abstract: An improved wedgelock assembly for retaining printed wiring boards in a device. The snap-together wedgelock assembly is made up of a screw assembly and a main wedge. The main wedge having fingers for retaining the screw assembly in place.

Abstract: An anchor for securing a mine roof bolt within a hole preformed within a rock strata. The anchor comprises a plurality of transversely bent plastic leaves, each having an aperture through which the roof bolt is received, a support nut threadably connected to the bolt for supporting the plastic leaves, a stirrup supported on the support nut and on which the leaves are rested and a bifurcated compression nut having a biasing member threadably connected to the roof bolt and a horizontal member slidably connected to the bolt below the biasing member and above the leaves for compressing the leaves against the stirrup responsive to the rotation of the roof bolt in a selected direction. As the transversely bent leaves are compressed the edges thereof are urged against the strata to grip the same and thereby secure the roof bolt within the hole. The stirrup and the horizontal member are shaped to maintain the leaves at a selected inclination during compression.

Abstract: An anchor for securing a mine roof bolt within a hole preformed within a rock strata. The anchor comprises a plurality of transversely bent plastic leaves, each having an aperture through which the roof bolt is received, a support nut threadably connected to the bolt for supporting the plastic leaves, a stirrup supported on the support nut and on which the leaves are rested and a compression nut threadably connected to the roof bolt above the leaves for compressing the leaves against the stirrup responsive to the rotation of the roof bolt in a selected direction. As the transversely bent leaves are compressed the edges thereof are urged against the strata to grip the same and thereby secure the roof bolt within the hole. The stirrup and the compression nut are shaped to maintain the leaves at a selected inclinations during compression.

Abstract: This invention relates to one-strike wedging type blank nails for use in rigidly joining, in a simple operation, wooden articles in manufacture of furniture, or ceramic articles (such as roofing or other tiles) or metallic articles in the building and construction industry, for example. Such a blank nail includes a main body in the form of a hollow pipe, and a pair of expander elements attached to opposite ends of the main body. The main body defines split slots extending axially at the opposite ends thereof to form wedging portions. Each of the expander elements includes a contained portion fitted into the main body, a large diameter portion having a larger diameter than the contained portion, and a flare portion formed between and continuous steplessly with the contained portion and large diameter portion. The large diameter portion defines an outward end surface acting as an input surface for receiving a compressive force applied in a direction to move the expander elements toward each other.

Abstract: An improved wedgelock assembly for retaining printed wiring boards in a device. The snap-together wedgelock assembly is made up of a screw assembly and a main wedge. The main wedge having fingers for retaining the screw assembly in place.

Abstract: A connecting element for a facing panel with a hole having a small depth and an undercut, includes an expanding cone insertable into the hole undercut, and thread shaft extending from the expanding cone. A roof-shaped bent expansible element is displaceable over the expanding cone for securing the connecting element in the facing panel hole. The roof-shaped bent expansible element is formed as at least approximately oval metal ring having opposite bent portions abutting the expanding cone.

Abstract: An expanding plug comprises an expanding sleeve made in one piece and provided with a continuous longitudinal slot, an expanding body arranged in the expanding sleeve, and a screw engaging with a thread in the expanding body and bearing with its head against a rim of the expanding sleeve. On its external wall the expanding body is provided with several expanding surfaces one arranged behind the other in longitudinal direction, which bear against associated inclined surfaces on the internal surface of the expanding sleeve. For the purpose of creating an embodiment particularly simple in design and manufacture, the inclined surfaces are provided on the projections of the expanding sleeve directed radially inwards and engaging with recesses of the expanding body 2 limiting the expanding surfaces.

Abstract: A tie rod with a fastening section presenting several spreading cones is provided with a cage which divides the hardenable mortar composition used for the fastening in a cylindrical bore hole into segments. On the occurrence of a crack through the fastening ground of the bore hole, a respreading of the mortar shell formed by the hardenable mortar composition is made possible by a tensile force on the tie rod.

Abstract: A bolt connection for connecting a hollow profiled member to a profiled member disposed transverse thereto where connection by welding is inadequate. A plate-like member that is resistant to bending is displaceably supported at one end against the inner surface of the hollow profiled member, and is supported at the other end against an abutment that is disposed remote from the aforementioned inner surface. The length of the plate-like member is slightly greater than the inside height of the hollow profiled member. The bottom of the hollow profiled member is preferably supported on a projection of the other profiled member. The abutment is preferably disposed at the top with the displaceable end of the plate-like member being at the bottom. By tightening the bolt that acts upon the plate-like member, a tight, releasable connection is provided.

Abstract: The invention is an improved anchor for machine bolts and other similar fastening devices in masonry or other materials. The improved anchor consists primarily of a two-piece body structure. When in use the two-piece body structure is arranged for receiving a fastening device, such as a machine bolt or other similar fastener. The two-piece body structure is cylindrical on the exterior thereof with the offset between the first and second of the two pieces of the body structure being a cut or separation through the body structure at an angle to the longitudinal centerline of the two-piece body structure. Each of the two pieces of the two-piece body structure has a plurality of saw tooth-like cuts or serrations on a portion of the exterior surface. The saw tooth-like cuts on the first piece of the two-piece body structure being located 180.degree. from the saw tooth-like cuts on the second piece.

Abstract: An expansion anchor assembly for use in a bore with an undercut section adjacent the base of the bore, includes an axially elongated expansion sleeve and an anchor bolt positioned within the sleeve with an expansion cone at one end of the bolt. The expansion sleeve is slit from one end for a portion of its axial length. By drawing the expansion cone into the slit end of the sleeve, the sleeve can be expanded. An expansion element is seated within a recess in the outside surface of the sleeve. The base of the recess has a decreasing depth in the direction toward the slit end of the sleeve. The expansion element secures the expansion anchor assembly within the bore.

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 device for fastening an object against a wall as a plug-in mounting is described, which is provided with an externally threaded bolt, onto one end of which a nut can be threaded and on the other end of which, which is at least partially conical and the maximum diameter of which is equal at most to the diameter of the bolt, an expander element composed of two half-shell-like parts is displaceably held. The two half-shell-like expander parts are provided, on their two longitudianl edges which in the mounted state are located opposite one another, with at least two lobes each, which for mutually securing one another axially engage one another adjacently and are held on the conical end by positive adjacent engagement in the radial direction and are disposed on the expander element in such a manner that the expander element parts are transversely symmetrical or in the developed state are point-symmetrical.

Abstract: A shell for use in expansion assembly which comprises a member of generally tubular shape, the member having a first end which is inclined to its longitudinal axis and being formed with at least a first line of weakness in its wall which extends in the axial direction of the member.

Abstract: A carriage for suspending a load such as a compartment of a vehicle or the like, is basically comprised of a pin, rod or bar from which the load is centrally suspended and which by and in itself is suspended by two wheel carriers, each supporting a wheel for running on opposite flanges of a rail; each wheel carrier has a clamping bore intersecting the bore receiving the load carrying rod and a tension pin-with-wedge is inserted in an intersecting bore for clampingly engaging the load bearing rod upon tightening of a nut on an external thread of the respective tension pin; loosening of the nuts releases a contour fitting engagement and permits the wheel carrier to be adjusted into any desired position on the load carrying rod; the wedges may be constructed as cutting edges for cutting into the load carrying rod upon tightening.

Abstract: For the progressive transfer of a tension or traction force from a fiber-reinforced plastic anchoring rod 10 to a threaded sleeve 20 surrounding one end of the rod, sawtooth shaped teeth are provided. The inclined flanks 6 of the teeth are increasingly longer as a function of the distance from the end 22 of the rod. The tooth length extension corresponds to the expansion of the rod under the local traction force which, because it becomes lower at each flank, decreases on a step-by-step basis. With this arrangement the rod can be stressed up to its breaking load without causing any damage to the threaded sleeve. This connection is suitable for any staying to fasten a cable to an anchoring element.

Abstract: A tubular anode such as tubular cast iron, magnetite, graphite, carbon or steel may be provided with an easily made internal or center connection having assured uniform resistance characteristics by the employment of at least two diametrically opposed wedge blocks, such blocks having parallel crowned and serrated contact surfaces and a wedge surface interface, such interface including a tongue and slot connection between the blocks, one or both blocks having oppositely extending tubular crimpable lead connections. The blocks may be made of malleable material so that when assembled and placed in the proper location inside the anode, one may be held while the other is driven axially, or both may be driven in axially opposite directions easily to form an electrical connection of assured electrical resistivity.

Abstract: An anchor bolt assembly includes an anchor bolt and an expansion sleeve. The anchor bolt has a leading end and a trailing end and includes a cylindrically shaped body extending from the trailing end toward the leading end. A frusto-concial part extends from the leading end toward the trailing end. A reduced diameter part interconnects the adjacent ends of the body and the frusto-conical part. The reduced diameter part has a diameter smaller than that of the cylindrically shaped body and equal to the minimum diameter of the frusto-conical part. The expansion sleeve is fitted onto the reduced diameter part by deforming it inwardly into partial surface contact with the reduced diameter part. The expansion sleeve has at least one deformable web permitting it to be expanded radially outwardly for anchoring the bolt in a borehole.

Abstract: The clamping arrangement has a pair of elements which are provided with mating conical surfaces in the self locking range. The elements can be axially displaced relative to each other by axial clamping screws for clamping purposes. Auxiliary rings are provided between the elements and have through bores for the clamping screws. With the clamping screws removed, the auxiliary rings can be turned to align a tapped bore in one ring and an abutment surface in the other ring with a clamping screw so that this screw can be used for separating the clamped elements from each other.

Abstract: A bolt-like fixing assembly for use in improving the strength and/or stability characteristics of rock structure, such as for reinforcing rocks, includes an elongate structure one end of which is adapted to be fixed within a bore formed in a rock and a device for fixing the other end of the elongate structure to the surface of the rock. According to aspects of the invention, the elongate structure is constituted of at least two rod-like members and a fixing device of the elongate structure is constituted by a wedge-shaped member and a bearing plate, such as a washer. The elongate structure is preferably constituted of three rod-like members, each of which preferably is constituted of a bulb steel rod.