Abstract: A novel quick release fastener system for efficient and reliable attachment, disengagement and reattachment of one or more work pieces secured by the fastener system. The fastener system includes a bolt and a nut. The bolt includes a shank with a head on one end with a leading end on the shank opposite the head. The nut has a wall which generally defines a bore having opposed edges which define a slot at least partially extending through the wall. Displacement structures are provided on the nut which provide a mechanical advantage in translating rotary and axial forces into circumferential and radial forces. Threads are provided on at least the nut for promoting axial displacement for engaging and disengaging the displacement structures. Threaded engagement and disengagement of the displacement structures deform or release the wall of the nut resulting in displacement of the opposed edges of the wall. In one embodiment the nut includes a constricting gripper which is threadedly engaged with a driving body.

Abstract: An expansible anchor for anchoring in a hole drilled in a concrete part has a shaft having a rear end for fastening an article and a front end with a portion of reduced cross-section and an adjoining expander cone; a slide-enhancing sleeve arranged on the shank, an expansible sleeve arranged on the shank and on the slide-enhancing sleeve, the slide-enhancing sleeve being formed as a thin-walled plastic sleeve having a continuous longitudinal slit and arranged on the reduced portion of the shank, the plastic sleeve having a stop edge that abuts the expansible sleeve and formed so that the slide-enhancing sleeve is pushable with the stop edge onto the expander cone when the expander cone is drawn into the expansible sleeve.

Abstract: A screw assembly is made up of a screw and a screw fixing member. The screw fixing member is inserted into a starting hole formed in a concrete wall and then the screw is driven into the fixing member in a continuous manner. The screw fixing member has a body having a cylindrical section formed with an eccentric bore having an opening at one end thereof. The screw has its tip inserted in the opening of the bore. The screw has a threaded shank and a cylindrical portion provided at one end of the shank. The screw and the screw fixing member are coupled together by inserting the cylindrical portion of the screw into the opening of the bore.

Abstract: A fail-safe anchor bolt assembly installable in a pre-drilled hole in masonry to fasten a fixture or other object thereto, the assembly remaining securely anchored even should the hole later be enlarged as a result of a crack developed in the masonry. The assembly includes a bolt having a head engageable by a torque tool to turn the bolt and a shank extending from the head loosely encircled by an expansible shell whose normal outer diameter is close to that of the drilled hole. Threadably received on the end of the shank adjacent the shell is a wedge nut having a generally conical frustrum shape defining a leading end followed by a leading portion which merges with a compressible trailing portion terminating in a trailing end, the leading portion having a maximum diameter close to the diameter of the drilled hole and the compressible trailing portion having a normal maximum diameter greater than the diameter of the drilled hole.

Abstract: A method of reinforcing a sandwich panel having opposed first and second skins spaced apart by a core having a thickness "F" in a manner to preserve the spacing between the skins, including the steps of boring an in-line hole through the panel to provide a hole in both skins and the core of a diameter "A", enlarging the hole in the first skin to a diameter "B", inserting a tubular sleeve into the in-line hole, the sleeve having a length substantially equal to "F" and having an external diameter greater than "A" and slightly less than "B", the first end of the sleeve contacting the inner surface of the second skin, and flaring the second end of the sleeve to an external diameter greater than "B" so that it engages the inner surface of the first skin, and inserting a bolt through the sleeve, the bolt having a head to contact the external surface of the first skin and applying a nut to the bolt to contact the external surface of the second skin so that the skins are held in fixed position by the bolt.

Abstract: A fastening device for fastening a first element to a second element, for example for mounting a component of a motor vehicle screen wiping apparatus on a panel of the bodywork of the vehicle, is of the general kind comprising a bolt and nut assembly, with the shank of the bolt passing through a hole in the panel. A shock absorbing bush, e.g. of rubber, is interposed between the bolt and nut assembly and the hole. When the device is tightened, this bush is compressed axially between an annular and radial thrust surface carried by the bolt and the annular gripping face of the nut. A gripping spacer element is disposed axially between the radial thrust surface and the annular gripping face of the nut.

Abstract: An expandable intervertebral cage apparatus includes a pair of cage components, each generally in the shape of a half cylinder. Each of the cage components provides a corresponding, abutting conically shaped recess that cooperates with a conical end portion of an expansion screw. One of the cage components carries a fitting with an internally threaded bore that receives external threads of the expansion screw. As the expansion screw advances into the cage, the conically shaped end portion of the expansion screw engages the conically shaped recesses on the cage components to expand the two cage components apart until they are in contact with the vertebral plates of adjacent vertebrae. The cage components have passageways for packing with bone-inducing-growth material allowing the cage to become part of a spinal fusion. A surgical method for installing the expandable intervertebral cage is also disclosed.

Abstract: An expansion dowel (1) is formed of an axially extending dowel member (2) having a leading end and a trailing end. The trailing end has an outwardly projecting collar (9) with an expansion region extending axially from the trailing end toward the leading end with at least one axially extending slot (7) or breakout groove therein. The dowel member (2) has a central throughbore (3) arranged to receive an expanding element (8). Throughbore (3) has an inside thread (15) in its leading end region. The expanding element (8) is an axially extending sleeve insertable into the trailing end of the throughbore (3) for expanding the expansion region (6).

Abstract: An orthopaedic cage device having a rectangular cross-section and an intervertebral space shape conforming structure is formed of two opposing shell elements being hinged at one end to form an interior volume therebetween. The surface of the interior volume is tapered in the axial direction. A threaded shaft is axially disposed in the interior volume and is held in place by a retaining ring slideably mounted at the non-hinged axial end of the device. A nut, being of substantially the same dimension as the maximum cross-section of the interior volume in its initial disposition, is disposed on the threaded shaft such that rotation of the shaft causes the nut to translate axially within the interior volume. This translation causes the nut to engage the tapered surface of the interior volume, which in turn causes the non-hinged end of the device to spread such that the device conforms to the natural space between the vertebral bones and provides for the proper curvature of the spine.

Abstract: In general a torque controlled blind bolt for securing workpieces is shown and which blind bolt has a core pin with a blind side head and a plurality of threads and a nut adapted to be threaded onto the pin threads; the blind bolt which has a main sleeve structure and an expandable blind side sleeve structure is set by torque applied between the pin and nut which causes the expandable sleeve to be expanded by the pin head and to thereby form a load bearing blind head; the blind fastener includes a grip adjuster structure which defines a cavity having a depth selected to define the grip range of the fastener with the grip cavity generally located externally of the workpieces; an anti-rotation structure is formed between the pin head and the expandable sleeve structure to inhibit relative rotation in response to the torque applied between the nut and the pin.

Abstract: An anchor and method for securement into a bore in a medium. The anchor has a first generally hollow cylindrical section having a first plurality of spaced longitudinally directed fingers and a second generally hollow cylindrical section having a second plurality of spaced longitudinally directed fingers. The first and second sections are arranged opposed to each other with the fingers of each section being interdigitated with the fingers of the other section. The first and second sections are adapted to receive a compression force moving the two sections relatively toward each other, whereby at least some of the fingers move outwardly so as to secure the two sections in the bore in the medium.

Abstract: A remedial wall anchor system includes a reinforcing rod or wire, a tie rod, anchor components which secure the tie rod to the facade wall and the back-up wall, and a capturing device. The tie rod extends between the facade and back-up walls and is insertable through a hole extending through the facade wall. The capturing device is secured to the front end of the tie rod and includes first and second spaced-apart upstanding surfaces joined by a linking member to form a channel for capturing a portion of the reinforcing wire. The remedial anchor system can be used both mechanical and adhesive facade anchors and back-up anchors. The remedial anchor wall system is easily and economically used to reconnect an existing facade wall to a back-up wall. Initially, the user forms a horizontal groove in a mortar bedjoint of the facade wall. Then, a hole is drilled into the grooved mortar line so that the hole is connected to the groove and extends through the facade wall.

Abstract: An anchoring device for anchoring a threaded member such as a screw or bolt in a substrate material includes an anchoring sheath for receiving the threaded member. The anchoring sheath includes annular anchoring ribs formed around a body portion of the anchoring sheath and at least one longitudinal rib extending along at least a portion of the body portion of the anchoring sheath and extend outwardly from the anchoring sheath. In a sheath with more than one longitudinal rib, the longitudinal ribs lie in different planes which intersect at the longitudinal axis of the anchoring sheath. The anchoring sheath preferably includes top and bottom regions which have no annular or longitudinal ribs. The bottom region can have an extended length to accommodate threaded members of varying lengths and a hole providing drainage of water, ice, or other debris as the threaded member is tightened into the sheath.

Abstract: A clamp assembly for clamping first and second objects together includes a sleeve adapted to fit within a first bore in the first object, the sleeve having a first end, a second end, and a slit extending from the first end to the second end. Bolt-driven sleeve-expansion components operate to radially expand the sleeve within the first bore of the first object while applying force to the sleeve axially toward the second object. One embodiment includes a cylindrically shaped, longitudinally split sleeve of resiliently deformable composition. A conically shaped member and a bolt having a conically shaped head and a shank adapted to screw into the second bore cooperate as sleeve expansion components. The tapered head of the bolt faces a first tapered inner surface of the sleeve, and a tapered exterior surface on the conically shaped member faces a second tapered inner surface of the sleeve. The shank of the bolt extends axially through the sleeve and the conically shaped member.

Abstract: An expansible fixing plug, comprising a body part composed of a plastic material and having a leading end and a rear end, the body part having a longitudinal channel extending from the rear end for insertion of a fixing screw and the like. The longitudinal channel has a cylindrical portion approximately corresponding to an external diameter of the screw. A narrowing portion adjoins the cylindrical portion. The body part also has a slot extending from the leading end over a part of a length of the body part. The narrowing portion of the longitudinal channel has a cross-section starting from the cylindrical portion and having a lozenge shape. The narrowing portion of the longitudinal channel in a plane of the slot has a corner to corner width which remains the same for an entire length of the narrowing portion and substantially corresponds to a diameter of the cylindrical portion.

Abstract: A fail-safe anchor bolt assembly installable in a pre-drilled hole in masonry to fasten a fixture or other object thereto, the assembly remaining securely anchored even should the hole later be enlarged as a result of a crack developed in the masonry. The assembly includes a bolt having a head engageable by a torque tool to turn the bolt and a shank extending from the head loosely encircled by an expansible shell whose normal outer diameter is close to that of the drilled hole. Threadably received on the rear end of the shank adjacent the shell is a conical frustrum-shaped wedge nut effectively divided into a leading zone and a trailing zone. The leading zone has a maximum diameter substantially equal to the normal outer diameter of the shell whereby in the course of installing the assembly as the bolt is turned to advance the leading zone of the nut into the shell, the shell is then expanded against the wall of the hole to produce an anchoring force.

Abstract: A metal fastener for use in attaching parts to a workpiece, for example a car bumper to a car body panel, is made in two pieces, which may be fixed together for example by a force fit, by adhesive or by welding. The fastener comprises a body, a thin walled portion which can be expanded to set the fastener, and two spaced apart head flanges. One of the two parts comprises the body and the other at least one of the head flanges.

Abstract: An intersomatic cage to be inserted from the posterior approach between two vertebrae comprises two substantially parallel branches for contact with the vertebral bodies, a linking portion linking the posterior ends of the branches, and a movable spreader member for angularly spreading the two branches after insertion of the cage between the two vertebrae. The cage allows adjustment of the lordosis angle between the two vertebrae during surgery. Ancillary equipment for insertion of the cage includes a rasp for forming a housing for the cage between the two vertebrae, a cage-holder for inserting the cage into the housing, a screwdriver for turning a screw screwed into the spreader member to spread the two branches of the cage, and a guide for successively guiding the rasp, the cage-holder with the cage, and subsequently the screwdriver.

Abstract: A rivet made of plastic material for securing a plate-like workpiece to a support assembly with an approximately plane surface comprises a shank having a hollow axial passage and at least two axially parallel slots open towards the free end of the shank, the shank portions formed thereby comprising at the outer sides thereof ramp-like portions projecting obliquely outwardly and downwardly, with the axial passage tapering towards the free end of the shank, a first plate-shaped flange at the other end of the shank, the flange having at its under-surface an annular relatively sharp sealing edge engaging the surface of the support assembly when the shank is inserted into an opening of the support assembly, a second plate-shaped flange upon the side of the first flange opposite to the shank and axially spaced thereform, and an expansion member having an annular sealing rib at its upper end, the annular sealing rib being sealingly engaged with the axial passage, when the expansion member is driven into the passage.

Abstract: A metal plug with a plug screw in a casing for attachment of articles to penetrable material. The plug screw of the plug serves a dual function; fixing the plug in the material and also permitting the variation of the distance of the articles relative to the penetrable material. The plug screw has a plug-screw head at a back end, a constricted diameter portion designated as an intended breaking point, and a front end coupled to a spreading cone, a spreading head, and a fixing head. The plug is anchored in the penetrable material by means of the spreading head in the following way. First, by turning the plug screw by means of the plug-screw head, the spreading head with spreading jaws is pulled onto the spreading cone and the spreading jaws of the spreading head engage in the penetrable material.

Abstract: An expansible anchor of metal for anchoring in a hole drilled in masonry has a bolt with several connected expander cones forming a thread and an expansible sleeve provided with an internal thread matching the expanding cones. To achieve high holding fores and low draw-in force, expansible portions are formed at uniform intervals along the internal thread of the expansible sleeve by U-shaped channels. The expansible sleeve is manufactured from powdered metal in an injection molding method using a system of binders combined with subsequent removal of binders and sintering, and an injection-molding tool having a removable thread core for the internal thread of the expansible sleeve.

Abstract: An expansible bone plug assembly comprises a first member closed by a substantially planar surface at one end thereof, the member having a cylindrical outer surface. A central bore extends through the planar surface, and a plurality of longitudinally directed radially extendable fingers form part of the first member. A second member is closed by a hemispherical surface at one end thereof, and has a cylindrical outer surface. A plurality of longitudinally directed radially extendable fingers form part of the second member. The second member fingers are interdigitated with the first member fingers, and bear against the first member and the first member fingers bear against the second member. An axially extensible and retractable compression member extends through the bore and is engaged with the second member for causing the first and second members to be drawn together when the compression member is retracted, so that the fingers of the first and second members are thereby caused to extend radially outwardly.

Abstract: The double connector for connecting two bodies, especially for connecting two slabs of stone, marble or the like, consists of two anchoring elements (4,5), one in each body being connected, and a sleeve-like connecting piece (1) including two stud parts on opposite ends. The connecting piece (1) is connectable with the stud parts on the anchoring elements located in drilled holes provided in the bodies. So that the double connector, in addition to having a simple assembly, can absorb comparatively large tensile and compressive forces, at least one anchoring element (4,5) consists of an expansion element (7) received in one (13) of the drilled holes and a anchor core (6) consisting of a cone (8) and a bolt part (6') extending from the cone (8) and provided with a bolt collar (9) spaced from the cone (8). The bolt collar (9) of the bolt part (6') engages or locks in a suitable undercut (15) provided in one of the stud parts.

Abstract: A removable hollow-wall anchor for fastening machine screws to a wall is disclosed. Commonly called a Molly bolt, in one aspect of the invention the head of the Molly bolt is unthreadable from the anchor part of the Molly bolt so that once the Molly bolt has been secured to the wall the head can be unthreaded so as to remove it from the outer surface of the wall. A gripper is used in conjunction with the head to prevent rotation of the Molly bolt when the machine screw is being threaded in or out. The gripper is also removable from the wall. Once the machine screw, head and gripper have been removed from the wall, the outer surface of the wall is flush and free from any part of the Molly bolt.

Abstract: A screw fastener helps secure a tapping screw easily and strongly to a wall. A starting hole is formed in a wall. The trunk of the screw fastener is inserted into the starting hole. The trunk has such a shape that it comes into contact with the inner surface of the wall defining the starting hole. A tapping screw is driven into the screw fastener thus inserted in the starting hole. The threads on the screw will bite into both the wall and the trunk so that the screw will be rigidly fastened to the wall.

Abstract: A blind fastener having a body, a core bolt, a nut and a sleeve. The core bolt passes through an axial bore of the body and includes an externally threaded portion at an inner end thereof. The nut has an enlarged head, a reduced diameter stem and a threaded bore for engaging the threaded portion of the core bolt. The sleeve is located between the enlarged head of the core bolt and a conically shaped inner portion of the body. An inner end portion of the sleeve is fixed to the stem of the nut. In a preferred embodiment, the inner end portion of the sleeve is crimped to the nut and has a thickness sufficient to engage the nut across the full width of an annular shoulder of the nut during setting of the fastener.

Abstract: Two components are attached together by a fastening device that permits three dimensional variation between the attachment points of the two component parts. The fastening device includes a bracket having a cylindrical body for insertion into the attachment opening of a first part and a leg for attachment to a second part. Rotation of the bracket about the cylindrical body provides two dimensions of adjustment. Sliding of the first part over the cylindrical body provides a third dimension of adjustment.

Abstract: An anchoring device for anchoring a threaded member in a substrate material includes a plastic anchoring sheath for receiving the screw. The plastic anchoring sheath includes annular anchoring ribs formed around a body portion of the anchoring sheath and at least three longitudinal ribs extending along at least a portion of the body portion of the anchoring sheath preferably parallel to a longitudinal axis of the anchoring sheath. The longitudinal ribs extend outwardly from the anchoring sheath and lie in different planes which intersect at the longitudinal axis of the anchoring sheath. The anchoring sheath preferably includes top and bottom regions which have no annular or longitudinal ribs. The plastic anchoring sheath may be coated with a resilient, elastomeric coating.

Abstract: An expansion bolt includes an elongated bolt body having a threaded section formed on one end and an expanded shoulder portion formed on an opposite end. An expansion cylinder slidably fits over the bolt body has a flat end supported by the shoulder and slits formed on the opposite end. An expanding ring has an inclined outer surface with the small end insertable into the slitted end of the expansion cylinder is slidably fit over the bolt body to have the small end thereof facing the slitted end of the expansion cylinder. A collar nut retains the expansion cylinder and the expanding ring on the bolt body with a support cylinder disposed between the collar nut and the expanding ring so that when the nut is tightened, the support cylinder forces the expanding ring toward the expansion cylinder to have the small end of the expanding ring wedge into and thus flaringly expand the slitted end of the expansion cylinder. The flaring tips of the slitted end are forced to be in tight contact engagement with a hole.

Abstract: An easily removable and attachable toilet seat connector and method is disclosed herein. The device of the present invention comprises a threaded bolt and a nut which is threadable thereto. The threaded bolt has an axially extending aperture. A pin fits within the axially extending aperture of the threaded bolt. The radius of the pin is expandable, thereby securing the pin to a toilet seat mounting bracket, the mounting bracket having a bracket hole extending therethrough to accept the pin. The pin also has a threaded aperture axially extending therein, and a screw is threadable with the threaded aperture of the pin to provide radial expansion of the pin. The method for attaching a toilet seat to a toilet bowl basin first comprises inserting the threaded bolt into a toilet bowl basin hole and threading a nut to said threaded bolt. Thereafter, the radially expandable pin is inserted into a bracket hole of a toilet seat mounting bracket. The radius of the pin is expanded to secure the pin to the toilet seat.

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: A metal dowel for anchorage in a wall panel, said dowel being made from a folded blank of sheet metal and comprising a pair of flat leg members folded over at one end to lie flat against each other, the legs tapering toward the folded end to form a pointed end to the dowel and being held together at said folded end by a breakable web formed by the fold between said legs. The leg members are fixedly connected together at the opposite end to form a head end to the dowel and a threaded hole is formed out of and located between the legs adjacent the head end of the dowel with a funnel-shaped recess formed out of and located between said legs being axially aligned with said threaded hole and located between the threaded hole and the pointed end. After insertion of the dowel pointed end first into a panel, threading of a threaded member into the threaded hole with the tip thereof entering into said recess, breaks the web and forces the legs apart to anchor the dowel in the panel.

Abstract: An expansible plug comprises a closed shank section formed as a shank sleeve provided with a screw channel and a longitudinal divided expansible shank, the shank being formed by two shank halves provided with staggered expansible elements which interlock to form a closed expansion region, the expansible elements being offset relative to one another and having bores arranged eccentrically relative to a center line of the expansible shank and overlapping so that an overlapping region forms a constricted screw channel, the expansion region tapering conically toward a plug tip, and one of the shank halves being connected to the shank sleeve in a joining region by a secure joint.

Abstract: A hybrid eccentric wedge anchor includes a cylindrical anchor body, an eccentric wedge unit, and cylindrical leading end. The eccentric wedge unit includes a tapered body, a shoulder between the tapered body and the anchor body, and a crescent shaped clip rotatably positioned around the tapered body. The longitudinal axis of the tapered body is different from the longitudinal axis of the anchor body. The shoulder varies in width around the circumference of the anchor body. As the crescent shaped clip rotates around the tapered body, its outer circumference varies from being flush with the outer circumference of the cylindrical anchor body to extending beyond the outer circumference of the cylindrical anchor body.The hybrid eccentric wedge anchor can be configured in many useful anchor forms having the eccentric wedge unit. Examples include, but are not limited to, expansion bolt or drop-in configurations.

Abstract: An expansion anchor including an anchor stem having a holding flange and a lock member having a corrugated portion is inserted into a fitting hole bored in concrete or another rigid material. The anchor is secured in the bore by forcing the lock member to squash the corrugated portion. The corrugated portion thus squashed expands into engagement with the inner surface defining the bore so that the expansion anchor is steadily secured in a non-removable state.

Abstract: There is disclosed an aerospace fastener system in which a threaded bolt fastener is secured with a free spinning threaded nut or collar and in which the engagement of the threaded members is fixedly secured by an adhesive. The length of the bolt fastener is preselected such that when the fastener is applied in a maximum grip condition, the end of the bolt fastener does not project beyond the top surface of the nut or collar, or is even slightly shorter than the length necessary to reach the top surface of the nut or collar. There is also disclosed a blind fastener system in which the adhesive is applied to the threads of the core screw of the blind fastener which are engaged upon installation of the fastener.

Abstract: A rivet fastener has a rivet housing and a shaft threaded into the rivet housing. The shaft has a head formed at a distal end thereof and being of a greater diameter than the threaded portion of the shaft. The head of the shaft supports a drilling element. The rivet housing is formed of two sections along the axis thereof, of which one section is of a greater diameter than the other one. The section of the greater diameter forms a borehole diameter of the drilling element.

Abstract: A sheet-metal nut for blind fastening a screw in a hole of a carrier plate, the nut having a top plate bearing on an upper surface of the carrier plate having a hole therein and an aperture for the passage of the screw, a base plate having a threaded portion adapted to be inserted into the hole in the carrier plate located at a distance from the top plate and a plurality of connecting webs connecting the base plate to the top plate that fold outwardly in use. The nut is formed from a single piece of sheet metal, the connecting webs being integrally connected at one end to opposite sides of the base plate and at the other end to two top plate halves that lie adjacent each other in the same plane and form the top plate.

Abstract: A body member having a first fastener therein and a cover having a through hole therein removably secured by a screw member. The screw member has a head at one end, a body portion and means for engaging the said first fastener. The outer diameter of the body portion is less than the outer diameter of the head and the outer diameter of the head is slightly less than the inner diameter of the through hole. An engaging member composed of an elastic body is mounted on the body portion. The engaging member has a free diameter less than the inner diameter of the through hole. When the screw member is partially screwed into the first fastener on the body member, the cover will pass over the screw member and can be secured to the body member by tightening the screw member. As the screw member is tightened, the engaging member expands in the radius direction and engages the outer circumferential edge or the circumferential inner wall of the through hole.

Abstract: A unitized expanding dowel is disclosed for accurately and repeatably locating a part having a through hole relative to a reference part having a hole of like size. The dowel includes a radially expandable, resiliently deformable cylindrical sleeve having an axial passage therethrough. A portion of the passage is frusto-conically shaped to complement a tapered expansion pin movable within the axial passage in a first axial direction to force the outer surface of the sleeve to radially expand into tight surface engagement with inner surfaces of the holes. Coupling means connect the sleeve to the expansion pin and permit movement of the pin in an opposite direction to allow contraction of the sleeve away from tight engagement with the holes while preventing withdrawal of the pin from the sleeve passage.

Abstract: The present invention is directed to an anchor assembly for installing a threaded mine-roof bolt under tension in a bore hole formed in underground passageways, mines, and the like. The anchor assembly includes a two compartment resin cartridge and a mechanical expansion unit. A support collar is threaded on the bolt to restrict axial movement of the mechanical expansion unit. The mechanical expansion unit includes a camming plug and an expansion shell. The expansion shell has a plurality of fingers extending upwardly from an annular collar. Spaces or slots are formed between adjacent fingers. Each of the plurality of fingers include a vertically extending rib for forming channels between the external surfaces of the fingers and the side walls of the bore hole to permit the free flow of resin. The side surfaces of the fingers adjacent the uppermost portion thereof are tapered so that substantially V-shaped notches are formed between adjacent fingers.

Abstract: A blind fastener for fastening panels, especially panels made of composite materials, comprises a fastener body received within aligned openings in the panels and a cylindrical stem passing through the fastener body. The stem has an enlarged stem head spaced from an inner end of the fastener body which projects inwardly beyond the inner surface of the inner panel. A deformable sleeve mounted on the stem between the stem head and the inner end of the fastener body is a two-piece sleeve comprising a forming sleeve and a containment sleeve. The forming sleeve is made of a relatively soft, deformable material, whereas the containment sleeve is made of a relatively hard, nondeformable material. When the stem moves outwardly through the fastener body during setting of the fastener, the forming sleeve deforms to a fully set condition in overlying contact with the inner surface of the inner panel, forming a large bearing area that does not damage the composite material of the panels.

Abstract: This key comprises a pair of elongated blocks each having a tapered recess; a tapered pin adapted to be inserted in a tubular tapered portion which is formed by bringing the pair of blocks together in such a manner that the tapered recesses confront, and mutually displaceable in the axial direction; and a clamping member adapted to be screwed into a threaded portion provided on one end of the tapered pin or the tubular tapered portion. The key obtained by assembling these parts can be fitted into a key groove provided between a driving member and a driven member. The clamping member is rotated to mutually displace the tapered pin with respect to the tubular tapered portion in the axial direction, thereby separating the blocks from each other, thus pressing the outer walls of the blocks against the inner wall of the key groove. As a result, the key is firmly fitted into the key groove, and the drive member and the driven member can be securely coupled together with a higher reliability.

Abstract: The anchor for anchoring in a drilled hole in concrete via a joining composition, includes a threaded bolt consisting of a straight shank portion having an expander cone at one end thereof to be inserted in the drilled hole and a threaded portion at the other end, the expander cone having an outer surface and an end face and widening toward the end face; an expandable sleeve arranged on the threaded bolt enclosing the expander cone and structured to be expanded by the expander cone and a plastic covering on the end face and the outer surface of the expander cone and an adjoining part of the straight shank portion. The complete plastic covering over the expander cone and the adjoining part of the straight shank portion ensures that the joining composition does not bond the expandable sleeve to the threaded bolt, thus hindering subsequent expansion of the expandable sleeve by the expander cone due to crack formation at the drilled hole.

Abstract: The retention value of a screw previously inserted into a wooden railroad tie is increased by an axially extending sleeve ( 20 ) having an external thread ( 24 ) and an internal thread (25). The thread revolutions of the internal thread (25) are offset axially by half (h) the thread pitch (H) of the external thread (24). Due to this offset of the threads, the screw is positioned in the sleeve so that its threads are located between the external thread revolutions affording a new retention, while the external thread (24) seats within the thread previously formed in the wooden railroad tie by the screw.

Abstract: A concrete anchoring device for a standard nut or bolt, comprising: at least one pair of identical wedge-shaped members aligned in mirror image relationship with their thinnest tapered edges in juxtaposition separated by a distance Y; and adhesive tape spanning distance Y and removably adhered to a substantial portion of the top surfaces of each pair of identical wedge-shaped members; and a method of using the concrete anchoring device to anchor a standard bolt head or bolt nut within a pre-drilled hole.

Abstract: A plug-type sealing assembly for hermetically closing a filler hole 24 of a lid 19 of a container 20, comprises: a plug 1 having a rod portion 3 in an upper part of which a large-diameter head portion 2 is formed, the rod portion 3 having a male screw 5 in its outer peripheral surface; and, a sleeve 8 provided with an axial through-hole together with a countersunk head portion 10 and a slit skirt portion 11 extending downward from a lower end of said countersunk head portion 10. In the through-hole, a female screw 15a, 15b is formed.

Abstract: An expansible anchor for anchoring of an article to a component includes a shank having a portion of reduced cross-section at a front end, elements for fixing the article at a rear end, an adjoining expander cone at a rear end of the shank, and an expansible sleeve positioned over the shank portion of reduced cross-section and locking elements projecting beyond the diameter of the expansible sleeve. To allow the expander cone to enter the expansible sleeve for expansion of it even in the event the drilled hole becomes enlarged as a result of cracks being formed in its wall, the expansible sleeve is provided with a plurality of longitudinal slits so as to form expander arms. Each of the longitudinal slits extends over at least half the length of the expansible sleeve from a front end edge of the expansible sleeve and continues into an enlarged opening provided in the sleeve.

Abstract: The expansible plug has an expander body at one end of a plug shank and an expansible sleeve which slids over the expander plug in operation. A sliding ring is often provided between the expander body and the expansible sleeve to improve the sliding properties of the expansible sleeve over the expander plug. To prevent slippage of the sliding ring off the expander plug, the sliding ring can be provided with an interlocking inner profile which engages in an outer thread or a plurality of annular steps on the outer surface of the expander body. The expansible plug can be used to attach objects to a masonry wall by inserting the expansible plug into a drilled blind hole with the expander body at the base of the hole and a fixing means which may include a threaded portion on the shank protruding from the hole.

Abstract: A tubular and preferably elastomeric radial holding and centering expandable bushing having a bore sized to pass a threaded shank of a fastening bolt and having a radially enlarged flanged one end thereof. The bore tapering outwardly toward the periphery to create a conical cavity between the bushing body from the flange rearwardly. The cavity receives a tubular expansion insert having a tapered periphery and internal bore slightly larger than the diameter of the threaded shank of the fastening bolt which insert is positioned to the side of the tubular bushing remote from the head of said fastening bolt. A folding wing nut structure includes a trunion nut having a tapped bore threaded on said shank of the bolt, axially outwardly of the tubular expansion insert to the side opposite to the tubular bushing. The structure includes a pair of foldable wings.