Abstract: The present disclosure relates to a blind fastener and a method of installation thereof. The blind fastener comprises a sleeve and a mandrel. The sleeve comprises a first sleeve end, a second sleeve end, and a cavity extending from the first sleeve end to the second sleeve end. The mandrel is configured to be at least partially received by the cavity of the sleeve. The mandrel comprises a first mandrel end disposed adjacent to the first sleeve end and comprising an enlarged portion having a diameter greater than a diameter of the cavity, a second mandrel end comprising a pull region, and a shank region extending intermediate the first mandrel end and the second mandrel end. The pull region comprises an axial length no greater than four times a diameter of the shank region and is configured to be engaged by an installation tool.

Abstract: A mounting assembly is provided for securing an element to a wall structure having a laminate outer cover residing adjacent to an internal thickness of compressible material. The assembly includes an anchor for engaging the wall structure and comprising a threaded outer wall for securing the anchor within the wall thickness, an elongated internal passageway for receiving an extent of an elongated fastener, and a deformable upper crown arranged about an open end of the passageway; a strut assembly coupled to the supported element; and an elongated fastener for securing the strut assembly to the anchor and wall structure. Other embodiments include a fastener assembly kit comprising a plurality of separate components to be assembled together to mount a strut member to a laminated foam wall panel, the components including an anchor, a washer assembly, a spacer, and an elongated fastener for securing the components to the wall panel.

Abstract: An implant fixation assembly for securing an implant to a bone includes a first member, a stem, a biasing member and a tensioner. The first member includes a bone-engagement surface. The stem extends from the first member for insertion into a bore formed in the bone. The biasing member biases a distal portion of the stem toward the bone-engagement surface. The tensioner pre-tensions the biasing member.

Abstract: A metallic test specimen (20) extends along a central longitudinal axis (500) between a first end (22) and a second end (24). The specimen has a first mounting section (30) and a section mounting section (32). A narrowed gauge section (34) is between the first mounting section and the second mounting section. The first mounting section and the second mounting section each have a blind compartment (44) extending longitudinally inward to a closed end (46).

Abstract: A fastening device for furniture fittings on furniture parts which includes at least one dowel core that can be inserted into a hole of a furniture part. The dowel core can be arranged inside a dowel sleeve, and an actuating device moves the dowel sleeve relative to the dowel core, so that the dowel sleeve spreads on the dowel core. The dowel core and the dowel sleeve have at least two, preferably more, corresponding inclined surfaces that are offset in the axial direction, so that if the dowel sleeve is moved relative to the dowel core, the dowel sleeve spreads substantially evenly at two, preferably more, axially offset locations.

Abstract: The invention relates to a surge arrester having at least one varistor block 1, one end fitting 3, one reinforcing element 9 which holds the varistor block 1 firmly on the end fitting 3 with a tensile load, and at least one anchoring element 27 which holds the reinforcing element 9 firmly on the end fitting 3 with a tensile load wherein the anchoring element 27 has at least one edge 29 which cuts into the reinforcing element 9. The anchoring element 27 is preferably a cutting-ring screw union.

Abstract: The present invention relates to an anchor bolt and more specifically pertains to a post-installed anchor that is securely anchored to, for example, an existing concrete floor. The post-installed anchor has a sleeve fit on a bolt body and a fixation member arranged on an edge of the bolt body and screwed to a threaded end of the bolt body. The fixation member has an internal threaded end and an expansion end. The expansion end is divided into four expansion pieces by slits. The expansion pieces are arranged to face a head of the bolt body and are slightly widened toward the head of the bolt body. One end of the sleeve forms a tapered face. After insertion of the post-installed anchor into a pilot hole (installation hole) bored in the concrete floor, as the bolt body rotates, the fixation member screwed to the bolt body moves toward the sleeve. This movement causes the expansion end of the fixation member to ride on the tapered face of the sleeve and to be pressed open and extended outward.

Abstract: A fastener assembly comprises a stud bolt including a bolt portion and a weld end to be welded to a workpiece, and a nut member to be screwed into the stud bolt. The nut member screwed into the stud bolt before welding is formed out of an electrically conductive material to allow the welding current to flow through the nut member into the stud bolt and weld the nut member to the workpiece while connected to the stud bolt. Then an attachment member is disposed on top of the workpiece, and the attachment member is fastened to the workpiece when the nut member is turned in the fastening direction.

Abstract: The invention relates to a fastening device (1) for furniture fittings (2) on furniture parts (13), comprising at least one dowel core (3) that can be inserted into a hole (14) of a furniture part (13), the dowel core being arranged inside a dowel sleeve (4), and an actuating device (5), by means of which the dowel sleeve (4) can be moved relative to the dowel core (3), wherein the dowel sleeve (4) spreads on the dowel core (3). The dowel core (3) and the dowel sleeve (4) have at least two, preferably more, corresponding inclined surfaces (7, 7?, 7?, 8, 8?, 8?) that are offset in the axial direction, wherein if the dowel sleeve (4) is moved relative to the dowel core (3), the dowel sleeve (4) spreads substantially evenly at two, preferably more, axially offset locations.

Abstract: The invention relates to a fastening device for furniture fittings on furniture parts, comprising at least one dowel core that can be inserted into a hole of a furniture part, the dowel core being arranged inside a dowel sleeve, and an actuating device, by means of which the dowel sleeve can be moved relative to the dowel core, wherein the dowel sleeve spreads on the dowel core, wherein the dowel core is radially resilient.

Abstract: An anchoring element for being mounted on a shaft (52) of a fastening element (51) includes a sleeve-shaped base body (13; 33; 63; 73; 83) forming a through-opening (12; 32; 62; 72; 82) for the shaft (52), and anchoring sections (15; 35; 85) projecting outwardly from an outer side of the base body (13) for anchoring on a wall of a borehole (42). Each of the anchoring sections (15; 35; 85) has at least four sides, with one of the sides forming a connection side (89) for connecting a respective anchoring section (15; 35, 85) with the base body (13; 33; 63; 73; 83) and with at least a side located opposite the connection side (89) forming a cleaning side (90) of the respective anchoring section (15; 35; 85). The cleaning side (90) has at least one cleaning edge for cleaning the wall of the borehole (42) during driving of the anchoring element (11; 31; 61; 71; 81) in the borehole (42).

Abstract: A hold-down device is provided for securing graphic arts die plates or die to flat bed or rotary chases having a series of generally cylindrical, hold-down device-receiving cavities. The chase cavities have an innermost portion of greater diameter than the outermost portion of the cavity, presenting a downwardly-facing shoulder therebetween. The device, which is adapted to be inserted in one of the cavities, has a pair of opposed, generally semi-circular anchor members. A fulcrum component positioned between the anchor members has a generally circular fulcrum section received in respective, opposed internal grooves in the anchor members. A lock ring that interconnects the ends of the members remote from the fulcrum section, biases those ends toward one another. When the device is installed in a cavity, the ends of the anchor members are forced toward one another to an extent that the device will fit within the outermost portion of the cavity.

Abstract: A temporary fastener includes a grip length indicator. By machining a flattened area into a body of the temporary fastener, by engraving an scale into the flattened area, and by attaching an indicator dot visible in the groove to a moving part of an internal assembly of the temporary fastener, the grip length of the installed temporary fastener may be read directly on the scale while the temporary fastener applies a clamp-up force to a structure. By using the temporary fastener of the present invention, it is possible to determine a fastener hole length while a temporary fastener is installed. Using the method for determining a fastener grip length of the present invention enables the effective determination of the correct fastener grip length for each particular fastener hole of a large structure, such as an aircraft airframe.

Abstract: The invention relates to an undercut anchor (10) comprising an anchor shaft (12) and a non-circular, for example triangular, anchor head (16). Said undercut anchor (10) is to be anchored in a borehole which is produced by ultrasound boring, has a cross-section matching that of the anchor head (16), and an undercut at the bottom thereof, that engages at the rear of the anchor head (16) following a rotation of 60°. A rotation-preventing element (18) is used to ensure that the anchor is rotationally fixed, said element having a cross-section matching the anchor head (16), and a recess (22) arranged on a front side thereof facing the anchor head (16) and corresponding thereto (16). When the anchor head (16) engages with the undercut of the borehole following the rotation, the rotation-preventing element (18) slides towards the anchor head (16) with the recess (22) thereof, holding the anchor head (16) in the borehole in a rotationally fixed manner, and thus securing the anchoring.

Abstract: An elongate fastener is provided for securing a pair of panels together wherein the panels includes respective bores therein. Each end of the fastener includes an expansible end portion thereon which is arranged to be received within the respective bore. A wedge member is mounted within each expansible end portion for longitudinal sliding movement between a disengaged position and an engaged position wherein the expansible end portions are expanded relative to the disengaged position. An actuator is located centrally between the expansible end portions for pivotal movement about an actuator axis which lies perpendicularly to a longitudinal axis of the fastener. The fastener permits a pair of panels to be mounted with one end of one panel abutted against the other panel wherein the actuator is accessible from a recessed installation aperture on an inner face of one of the panels. The resulting joint is secure while being hidden from view using a one-piece fastener.

Abstract: A temporary fastener includes a grip length indicator. By machining a flattened area into a body of the temporary fastener, by engraving an scale into the flattened area, and by attaching an indicator dot visible in the groove to a moving part of an internal assembly of the temporary fastener, the grip length of the installed temporary fastener may be read directly on the scale while the temporary fastener applies a clamp-up force to a structure. By using the temporary fastener of the present invention, it is possible to determine a fastener hole length while a temporary fastener is installed. Using the method for determining a fastener grip length of the present invention enables the effective determination of the correct fastener grip length for each particular fastener hole of a large structure, such as an aircraft airframe.

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 0.08 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 locking arrangement is for a receptacle and cover with overlapping parts and aligned holes through the overlapping part. A bolt extends into at least one of the holes with a handle at one end of the bolt for pulling the bolt out of the aligned holes in a withdrawing direction. An expansion mechanism at an opposite end of the bolt expands to prevent withdrawing the bolt. The mechanism has a contracted geometry for allowing withdrawing of the bolt. An actuator mounted for movement to the bolt is pushed to contract and unlock the mechanism. A spring biases the expansion mechanism toward the expanded geometry so that when the actuator is not being pushed, the expansion mechanism is in the expanded geometry to lock the cover to the receptacle.

Abstract: The invention comprises a roof bolt and nut in screw threaded engagement, said bolt comprising a shaft for insertion in a hole drilled in a mine roof and a threaded portion engaged by the nut whereby the bolt may be rotated. The nut is offset with respect to the longitudinal axis of the shaft of the bolt so that when the bolt is rotated by means of the nut, the bolt is caused to describe a circle of greater diameter than its own diameter, the amount of said offset being from about 0.015 to about 0.50 inches. Preferably the offset is from about 0.02 to about 0.25 inches. The nut may be releasably locked in screw threaded engagement with the bolt so that the bolt can be rotated by means of the nut and above a selected torque the nut will break out.

Abstract: An integrated joint assembly fastener is described for removably securing two adjoining members together along flat mating surfaces. A housing is provided with an off-center circular bore in which a rotatable element is held captive. The bottom end of the rotatable element has an offset connecting post which extends perpendicular to a slit provided in a rear sidewall of the housing. Stationary wedges on the housing front project from opposite side of the slit. A pair of connecting dowel head sections project from the front opening and are engaged by the offset connecting post of the rotatable element. The dowel head sections have a gripping ridge section at a free end and an inclined abutment formation for sliding engagement against the wedges. By rotating the rotatable element, the gripping ridge sections of the dowel head are pulled back and wedged outwardly, laterally.

Abstract: An expansion anchor comprises a stud having threads including a root, a land, and a taper extending between the root and the land and a helical member having a leading edge threadingly engageable with the threads, wherein the helical member is movable between an unexpanded position and an expanded position, wherein in the expanded position the leading edge is forced radially outwardly by the land. In one embodiment, the helical member includes a finger extending in a leading direction. A method also is disclosed for anchoring the inventive stud within a hole in a substrate by expanding the helical member until the leading edge is wedged between the land and a wall of the hole.

Abstract: An expansion anchor comprises a stud having threads including a root, a land, and a taper extending between the root and the land and a helical member having a leading edge threadingly engageable with the threads, wherein the helical member is movable between an unexpanded position and an expanded position, wherein in the expanded position the leading edge is forced radially outwardly by the land. In one embodiment, the helical member includes a finger extending in a leading direction. A method also is disclosed for anchoring the inventive stud within a hole in a substrate by expanding the helical member until the leading edge is wedged between the land and a wall of the hole.

Abstract: A motor-installed roller (3) has a roller body (6) with ends closed with fixtures (7), and apertures (30,31) are formed in the roller body and fixtures, respectively. A recess (32) also formed in each fixture (7) extends in axial direction of this fixture so as to communicate with the aperture (31). A hollow pin (9) as the fastener has a solid basal portion (36) and a collapsible foot (35). This foot is deformed by an external force applied to the solid portion in its axial direction, so as to extend along the inner surface of the recess (32) such that the hollow pin (9) is locked in place not to slip off even if subjected to vibration. The solid portion (36) of this pin prevents the roller body (6) from moving relative to the fixture (7), or relative to any closures, bearings or the like easily attached to the roller.

Abstract: An expansible fixing plug (10) has an expansion screw (14), which is located in an expansible fixing plug sleeve (12). In accordance with the invention, a screw thread (30) is of saw tooth construction and a rear part (16) of the fixing plug sleeve (12) is axially extendable. When the expansible fixing plug (10) is subjected to axial loading the expansion screw (14) moves axially in the fixing plug sleeve (12) and the screw thread (30) expands the fixing plug sleeve (12). The expansible fixing plug (10) therefore has a subsequent-expansion behavior when a drilled hole becomes enlarged. The expansible fixing plug (10) can be mounted by hammering in without turning the expansion screw (14). The core diameter of the screw thread (30) enlarges from the front to the rear to increase the capacity of the expansion screw (14) to withstand transverse loading.

Abstract: A fixation device and apparatus for inserting the fixation device securely into a bore in an element, e.g. bone. The apparatus is a hand held device having an actuating mechanism and a longitudinally extending member coupled to the hand held device adapted to hold the fixation device at a distal end. The fixation device has a plurality of engaging members adapted to be moved outwardly when the fixation device is inserted into the bore to secure the fixation device in the bore. The extending member has an operating member coupled to the fixation device for exerting a force on the fixation device tending to cause the engaging members to extend outwardly to engage the wall of the bore. The operating member is releasably coupled to the fixation device so that once the fixation device is installed, the hand-held insertion apparatus can be removed. In one embodiment, the fixation device is releasably held by a forceps of the hand held device.

Abstract: An elongate fastener is provided for securing a pair of panels together wherein the panels includes respective bores therein. Each end of the fastener includes an expansible end portion thereon which is arranged to be received within the respective bore. A wedge member is mounted within each expansible end portion for longitudinal sliding movement between a disengaged position and an engaged position wherein the expansible end portions are expanded relative to the disengaged position. An actuator is located centrally between the expansible end portions for pivotal movement about an actuator axis which lies perpendicularly to a longitudinal axis of the fastener. The fastener permits a pair of panels to be mounted with one end of one panel abutted against the other panel wherein the actuator is accessible from a recessed installation aperture on an inner face of one of the panels. The resulting joint is secure while being hidden from view using a one-piece fastener.

Abstract: An expansion dowel, including an expansion sleeve (2) having a rear section (3) provided with an inner thread (4), an opposite expansion section (5) with a plurality of expansion tabs (6) separated by axial slots, and a stepped bore (9,10) having in, the expansion section (5), a smaller inner diameter (s) than in the rear section (3) and a circumferential annular shoulder (11) formed in a transitional region between the rear and the expansion sections (3,5) and facing substantial toward a rear end of the expansion sleeve (2), and an expansion member (12) provided at a front end of the expansion sleeve (2) projecting beyond the front, the expansion member (12) projecting beyond the front end of the expansion sleeve (2), widening substantially conically in a setting direction (5), and having a length (l) larger than a length (k) of the expansion section (5) of the expansion sleeve (2).

Abstract: An axially extending expansion anchor or dowel has an anchor body (2) with a first end region to be inserted first into a borehole (B) in a receiving material (G) and a trailing second end region in which a load can be applied. The first end region has an axially extending expansion region with at least two expanding tangs (7) separated from one another by axially extending slots. The first end region has a opening (11) into which an expanding body (12) is displaceable axially for radial expansion of the tangs (17). The axially extending opening (11) has an inner axially extending surface (10) closer to the axis of the anchor body and formed by a guide pin (9) of the anchor body (2) and an outer axially extending surface formed by the inner surface of the tangs (7). The expanding body (12) is basically sleeve-like shaped and has an inner surface which bears against the inner surface (10) of the opening (11). The outer surface of the expanding body (12) is, at least in part, wedge shaped.

Abstract: A drive-in dowel formed as a sleeve (2, 22) provided with a load application element (3, 23) and having a front section formed of a plurality of expansion elements separated from each other by longitudinal slots, with each of the plurality of expansion elements being formed of a trailing expansion tab (8, 28) and a leading expansion tab (9, 29) separated by a flexible transitional region (6, 26) and forming with each other an angle (.alpha.) from about 100.degree. to about 160.degree., with a front end of the leading tab being located closer to a sleeve longitudinal axis (A) than the flexible transitional region (6, 26); and with the sleeve being provided with a plurality of chisel-like cutters (10) on outer surfaces of respective flexible transition regions (6; 26) which substantially do not project beyond the outer diameter of the sleeve.

Abstract: Extended fatigue endurance and high pre-load are achieved in a structural blind fastener by combining the best features of screw type and pull type blind fasteners. We replace fatigue critical details from the shear plane with close tolerance, slip fit, core bolt and outer bolt shanks to obtain the desired structural load paths while retaining anchoring features of screw type fasteners to introduce adequate pre-load. These fasteners are compatible with currently available blind bolt insertion tooling.

Abstract: An expansion dowel is formed of an axially extending expansion sleeve (2) with a through bore (9) and an expansion region (3) having at least one axially extending slot (5), and an expanding member (6) axially displaceable by axially directed blows in the through bore from an initial position to an end position in which the expansion region (3) is expanded. The through bore (9) has an inside surface (4) of the expansion region (3) adjacent to an envelope or outside surface (7) of the expanding member (6) in the end position with the radius of curvature (a) of the inside surface (4) basically the same as the radii of curvature of the envelope surface (7) of expanding member (6).

Abstract: A device for clamping a pipe includes a base part having a channel formed by two grooves and two ribs and having a coarse surface. A cap part includes a latch for engaging with the channel and having two flanges for engaging with the grooves and having a coarse surface for engaging with the coarse surface of the base part and for solidly securing the latch and the cap part to the base part. The base part includes a wedge extended in the channel. The latch includes a notch for engaging with the wedge and for solidly securing the latch to the base part.

Abstract: We achieved extended fatigue endurance and high pre-load in a structural blind fastener by combining the best features of screw type and pull type blind fasteners. We replaced fatigue critical details from the shear plane with close tolerance, slip fit, core bolt and outer bolt shanks to obtain the desired structural load paths while retaining anchoring features of screw type fasteners to introduce adequate pre-load. Our fasteners are compatible with currently available blind bolt insertion tooling. The present invention pertains to a lightweight version of the structural blind fastener wherein we set the backside anchor collar with matching threads that engage between the outer sleeve bolt and inner core bolt.

Abstract: Lettering plate (10) which is to be attached to the outside of a lattice jacket of a pallet container has a lower support edge (14) which is flanged or bevelled to the outside. The lower support edge abuts horizontal lattice rod (8) and reaches behind it. Two side edges (15, 16) of the lettering plate are flanged to the outside for resting on two vertical lattice rods (9). Openings (18) are provided in center section (17) of two side edges (15, 16) to hold horizontal lattice rod (8). The lettering plate (10) also has an upper edge (19) which is made as a clawed edge and which in the mounted state fits behind horizontal lattice rod (8) thereby resiliently bracing plate (10) against horizontal lattice rod (8). The horizontal lattice rod abuts the back of the plate in a middle plate section. The lower and upper edge (14, 15) have, depending on the size of lettering plate (10) and the grid division of the lattice jacket, one or more openings for holding one or more vertical lattice rods (9).

Abstract: An improved machine screw for engaging a correspondingly threaded aperture, comprising a threaded shank having a proximal portion and a distal portion. A head adapted to be rotated may be formed on a shank proximal end opposite the shank distal portion, such that the shank extends axially therefrom. The shank is deformable from a first position to a second position, for either (1) minimizing the contacting surface area between the shank and said aperture, and thereby allowing the machine screw to be easily insertable into said aperture, or (2) maximizing the contacting surface area between the shank and said aperture after the shank has been fully inserted into said aperture, and thereby making the hold between the screw and said aperture more secure. Such deformation of the screw occurs during its insertion into said aperture. It has been found that this deformation prevents screws of the present invention from seating improperly within threads of said aperture.

Abstract: The fastener, which is typically made of thermoformed or similar plastic, includes a shank portion at least two parallel fingers which further include a proximal end and a distal end. The proximal end of the fingers is integral with a base portion and the distal end of the fingers is integral with bridge elements which attach to a wedge element. A driving pin is attached to the base portion and is aligned with a gap formed between the at least two parallel fingers. The parallel fingers further include lateral serrated portions and radially oriented stabilizing fins. Upon impact to the driving pin when the fastener is placed into a blind threaded aperture, the wedge portion forces apart the distal ends of the parallel fingers, while the driving pin forces apart the proximal ends of the parallel fingers thereby driving the serrated portions of the fingers against the threads of the blind threaded aperture.

Abstract: An expansible plug for anchoring in a drilled hole having an undercut, comprises a threaded bolt having a leading end with an expander cone at the leading end, an expansible sleeve having a leading end and a rear end and provided with a plurality of longitudinal slits starting from the leading end of the expansible sleeve and extending for a part of a length of the expansible sleeve. The expansible sleeve has a cylindrical portion arranged at the leading end of the expansible sleeve, and also an annular groove adjoining the cylindrical portion and tapering toward the rear end of the expansible sleeve. The groove is bounded in a region of the slits by a rounded portion. The expansible sleeve is composed of a fiber-reinforced, high-strength plastic material.

Abstract: A friction clutch having tangential leaf springs which are fastened by means of blind hole rivets, on one hand to the pressure plate, and on the other hand to the clutch housing, whereby the blind hole in the pressure plate is conical.

Abstract: A blind rivet has a first part comprised of a central core having depending circumferentially spaced legs spaced radially from the axis of the first part and radially projecting, circumferentially spaced flanges at an upper end forming a head for the first part. The second rivet part includes a bulbous lower end having an upstanding central core with radially outwardly projecting legs. The legs of the second part are spaced circumferentially from one another and, above the core, are spaced radially from the axis. Upon inserting the first part into the second part, cam follower surfaces on the distal ends of the legs of the first part engage and are cammed outwardly by cam surfaces in curved chaseways between the legs of the second part to set the rivet and grip the undersurface of the elements being connected. The flanges of the first part are received in the spaces between the flanges of the second part and engage the outer surface of the outer element to be connected.

Abstract: An expansion dowel is formed of an axially extending sleeve (1) with a cylindrically-shaped outside surface. A setting tool for expanding the sleeve includes an axially extending handle part (2) holding an axially extending striking part (3). The handle part (2) has an axially extending recess (2b) with a concave-shaped base in its outside surface. The axial length (L) of the recess (2b) is substantially the same as the axial length (1) of the sleeve. A clearance-free seating of the expansion dowel into the recess (2b) indicates to the tool operator that a correct expansion dowel is being used with the tool for assuring a proper expansion of the dowel.

Abstract: A method and system for securing an anchor in a hard substance or rigid material include a cutter bit for drilling a hole in the hard substance, an anchor for fitting within the drilled hole, the process of drilling the hole using the cutter bit, the drilling machine for using the cutter bit, and the resulting improved hard substance or rigid material that may be used as a curtain wall for fastening to a building or similar structure. The hard substance may be a sheet of granite, marble, glass, limestone, or other similar material. The invention includes an anchor that has a cylindrical shaft, a bevelled head portion, and an expanding collar for fitting within and securing the anchor in a drilled hole of the hard substance. The drilled hole includes a bevelled bottom portion that receives the bevelled head portion of the anchor and the expanding collar. A placement device transmits an impacting force to place the expanding collar around the bevelled head portion of the anchor.

Abstract: The invention relates to devices for anchoring one part (P) relative to another (M) comprising a nut (4) and a conical ring (5), the base (1) of the part to be anchored (P) made up of first part (2) around which said nut (4) passes and a second truncated cone shaped part (3) receiving the conical ring (5), a hole (6) in the anchoring part (M) receiving the base (1) and its conical ring (5), the bottom of said hole (6) being provided with spring washers (9).

Abstract: A concrete anchor has an anchor body 21, which is a rod-shaped member 22 having a male thread 23 and a striking head 24, both formed at one end of the member. This rod-shaped member 22 further has at its another end a cylindrical portion 25 so that slots 26 extend axially from an open end of the portion so as to provide expandible feet 27. Saw-toothed scratching tips 28 are formed to be acute ends of the expandible feet. A tapered plug 31 which is inserted in the cylindrical portion 25 has an annular recess 34 and a retaining shoulder 36, both formed between a large diameter portion and a root 35 of the tapered plug, with the annular recess providing a cavity to receive concrete scrapings, so that an impact applied to the striking head can provide a strong and effective retention force for the concrete anchor, and any cracks which may be produced around a hole holding the fixed anchor does not impair the retention force.

Abstract: A self-drilling expansion screw capable of being driven by a screw driving means comprises: (a) a screw shank having a first end and a second end, including: (1) an expansion hole extending a distance along the axis of the screw shank from the first end toward the second end; (2) a slot located on the expansion hole, for communicating the expansion hole with the outer periphery of the screw shank; (3) a holding portion, formed by a plurality of strip grooves provided at the outer periphery of the screw shank with respect to the expansion hole; and (4) a screw threaded portion provided between the second end and the holding portion; (b) a nut member screwed from the screw threaded portion; (c) a taper head having a coarse end and a small end, the small end inserted into the expansion hole, the holding portion expanding outwards while the taper head is pushed into the expansion hole; (d) a drilling bit provided at the coarse end; and (e) a coupling portion provided at the second end of the screw shank, for enga

Abstract: A blind rivet assembly comprising a body made with an insertion head at one end and having a setting concave face at the other end, and an axial thread hole in which a screw is located, the screw having a head at one end and a break-away stem at the other end. A deformable, cylindrical socket, or sleeve, with a two-step axial hole is installed on the screw between its head and the setting concave face of the body, the step with the larger inside diameter being located at the side of the body. In order to prevent damage to the composite materials which are being joined and the tearing-off of the screw by limiting assembly loads, the axial hole of the cylindrical sleeve has an additional step with the smallest inside diameter located at the side of the screw head, a predetermined ratio of the thickness of the walls of the additional step and the second step adjacent being provided, the thickness of the wall and the length of the second step also having a predetermined range.

Abstract: A threaded, locking set screw with standard outer dimensions having a thred body, an expansion plug, and a retaining wedge. The threaded body has a tapered cavity at its bottom end. The expansion plug and retaining wedge are inserted into the cavity in the body. The base of the plug extends from the cavity, and the plug is held in place by a force fit between the wedge and a retaining slot in the body. When the set screw is tightened against a part, the plug is forced into the cavity. Because of a locking taper between the plug and the cavity, the plug exerts an outward force on the inner surface of the cavity causing the set screw body to expand radially, thus, locking the set screw in place.

Abstract: A method of repairing a nuclear power facility metal component assembly with a "Class A" fastening between hard metal parts (12,14) includes several steps they are:providing aligned openings (20,22) in a plurality of hard metal parts (12,14) to be assembled;EDM machining a non-cylindrically shaped cavity (16) which is analogous to a counterbore having a cavity opening (24) smaller than the cavity base (18);inserting a locking collar (10) with a central aperture (32) and surrounding flange (3) to receive a bolt head (42) and with weakened zones of deformation (34) through the cavity opening (24);inserting a headed and threaded bolt (40) through the central aperture (32) of the locking collar (10) and into the aligned bores (20,22);providing threads (46a) in another of the hard metal parts to mate the bolt threads (46);torquing the bolt (40) in the provided mating threads (46a) to draw the bolt head (42) toward the cavity base (18) and deforming the locking collar at its weakened zones of deformation (34) to ca

Abstract: An expansible plug for anchoring in conical inwardly expanding drilled holes comprises multi-slotted expansion anchor having an inner opening with a cylindrical part, and an expander body having a bearing slope and a pin engaging in the inner opening of the expansion anchor, the inner opening of the expansion anchor having a front end provided with a funnel, a conically expanding first portion adjoining the funnel and a second portion having a length corresponding to the length of the first portion and reducing to a diameter of the inner opening. The bearing slope of the expander body rests in the funnel of the inner opening of the expansion anchor and is held by a peg clampingly engaging in the cylindrical part of the inner opening.

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: A blind anchor capable of anchoring a smooth rod in a hole drilled in an existing structure. The blind anchor consists of a cylindrical expansion sleeve having a cylindrically tapered aperture and a jaw cluster that fits within the expansion sleeve. The expansion sleeve may be slotted to facilitate expansion and may include external ribs to firmly grip the interior of the hole. The jaw cluster is fashioned from a plurality of jaw members that are expandably retained together in a notched retaining ring. The connections between the blind anchor, the smooth rod, and the hole are beneficially reinforced when the rod experiences a pulling force away from the hole.