Abstract: A retractable fastener device and method for facilitating the fastening of multiple objects are provided. The retractable fastener may extend through an aperture defined in at least one component having a first side and a second side and further includes a tab device that may be extended and/or retracted so as to selectively prevent the retractable fastener device from being removed from the aperture through the first side.

Abstract: A bolt and nut structure has a bolt nail, a nut nail and an elastic tube. The elastic tube has several outward plates, several convex blocks, a convex edge, and an elastic gap. The edge of the elastic tube has a ring hook. Inward plates on an inner side of the elastic tube will slide along a planar surface of the bolt nail but will engage an oval surface of the bold nail. Accordingly, the elastic tube is first placed in an interior space of the nut nail, an objected is then clamped between the bolt and nut nail, and the bolt nail is rotated 90 degree to fasten the object. The bolt nail can also be rotated 90 degree in an opposite direction to loosen the bolt nail. Therefore the bolt and nut structure are very convenient in use.

Abstract: A retractable fastener device and method for facilitating the fastening of multiple objects are provided. The retractable fastener may extend through an aperture defined in at least one component having a first side and a second side and further includes a tab device that may be extended and/or retracted so as to selectively prevent the retractable fastener device from being removed from the aperture through the first side.

Abstract: A fastener apparatus is disclosed that features projecting locking members that extend and retract when a central drive shaft is rotated. The exterior of the connector has a body that is partially threaded to receive a nut so that two structures (eg. flanges, panels, plates, beams, etc.) can be pulled together by tightening the bolt when the locking members are in the extended position. In one embodiment, the shaft can be an eyebolt.

Abstract: A toggle bolt type connector has projecting locking members that extend and retract when a central drive shaft is rotated. The exterior of the connector has a body that is partially threaded to receive a nut so that two structures (eg. flanges, panels, plates, beams, etc.) can be pulled together by tightening the bolt when the locking members are in the extended position.

Abstract: The invention relates to a plastic nut for mounting on a component having a penetration, said plastic nut being insertable into the penetration with a nut piece having a receiving hole for a screw and being provided with a flange for contact with one side of the component and with snap-on hooks for contact with the other side of the component, said snap-on hooks securing the plastic nut to the component, wherein, when in the relaxed position, said snap-on hooks on the one hand conform in their radial extent to the internal dimension of the penetration and on the other hand cover the receiving hole and spread apart when the screw is inserted and position themselves opposite the component.

Abstract: A joining assembly for joining a pair of structural members, comprises a bolt having a thread and a nut-like blind rivet adapted to be inserted into mounting holes of the structural members and to be threadingly engaged to each other. One of the mounting holes is made of resiliently deformable material and comprises a base member including a bore for receiving the thread of the bolt and having an outside provided with a plurality of threads which are similar in number to the corners of the polygonal mounting hole, such that when the bolt is threadingly engaged into the bore of the blind rivet the base member is folded whereby the threads have parts of their flanks pressed against one of the structural members.

Abstract: A connecting element for connecting two structural components, particularly furniture plates, includes a sleeve with an upper part and a lower part and a bolt having a rearward bolt end and a forward bolt end mounted in the sleeve. The lower part of the sleeve together with the rearward end of the bolt can engage in a recess of a first structural component and the upper part of the sleeve and the forward end of the bolt can engage in a recess of a second structural component and a head of the bolt at the forward end of the bolt can engage in a supporting or clamping device arranged in the second structural component. At least one brace is mounted on a portion of the upper part of the sleeve adjacent the lower part of the sleeve, wherein the at least one brace extends obliquely outwardly towards the lower part of the sleeve and is pivotably towards the sleeve.

Abstract: A dismountable clip includes a stem part (11), an entry end (13), and a hole edge attachment end (12), intended for insertion into a hole. The stem part has protruding heel-like elements (14a, 15a) which can be pivoted in and back out elastically. In a recess (18) in the stem part, each heel-like element has a maneuvering shoulder (19, 20), at a distance inwards from a hinge (16, 17) connecting the heel-like element and the stem part. An axial hole (23) for receiving a dismounting tool is formed through the hole edge attachment end and the stem part to the maneuvering shoulders. A free space (22) is situated between the maneuvering shoulder and the entry end to allow the maneuvering shoulder and, hence, the heel-like element to be pivoted with the dismounting tool about the hinge in the direction towards the entry end.

Abstract: A friction stir rivet is rotated and driven through a first fusible workpiece into an engaged second fusible workpiece, causing local portions of the first and second workpieces to plasticize. A slideable cap contacts the exposed surface of the first workpiece shortly after the process begins. The cap acts as a retaining element limiting plasticized material from escaping during the process. As the rivet is further driven into the members the cap slides up the rivet and actuates an angled stirring member to increase the stir radius around the body of the rivet. Once the rivet is driven into the first and second workpieces, rotation is stopped and the plasticized material cools and hardens around the rivet, creating a weld joining the workpieces and encompassing the rivet, which provides additional mechanical strength.

Abstract: In a plastic injection anchoring sleeve having an essentially cylindrical sleeve body with a closed front end and an open opposite end for the insertion of an anchoring bolt, the sleeve wall has a plurality of openings closed by flaps which are formed integrally with the sleeve and pivotally supported thereby at their front ends, the flaps being provided with axially extending ribs projecting radially inwardly and having inclined front and rear end portions forming ramps for lifting the flaps outwardly and out of the openings when the sleeve body is removed axially from a molding core after injection molding, or when an anchor bolt is inserted into the sleeve body.

Abstract: An expandable bone fastener adapted to be inserted into an untapped hole drilled in a bone, thereafter adapted to expand a plurality of barbs into the surrounding bone has an enlarged proximal end, a tubular outer body portion having an axial bore, a distal end having either expandable or non-expandable legs dimensioned to fit snugly within the hole, and an expansion pin slidably mounted within the axial bore. The tubular outer body portion of the expandable bone fastener has a plurality of longitudinal slots in the wall thereof to allow the expansion and retraction of the expansion pin's barbs into or out of the surrounding bone. The barbs on the expansion pin may be elastically deformed from a normal, retracted configuration to a locking, splayed configuration wherein the outer ends of the barbs extend outwardly through the slots in the tubular outer body portion to penetrate the surrounding bone as the expansion pin is moved in a proximal direction from a fully extended position.

Abstract: A fixture for an electrical device includes a pin casing, a spring, a ring block and a pin. A pin casing has a trough formed from a bottom and a round-wall for containing spring and ring block. The round-wall forms at least a flange to limit ring block inside pin casing. The pin has a press portion and a wedge portion. The wedge portion passes through ring block, spring and pin casing so as to combine those together. The press portion is used for pushing the ring block to compress the spring.

Abstract: An expandable bolt device secures a fragile part, like a quartz part, onto a second part. The expandable bolt device comprises a bolt and a locking device near a distal end of the bolt, the locking device being movable radially between an outward locked position and an inward unlocked position by moving the bolt axially with respect to the locking element. The distal end of the bolt is accommodated within a hole in a surface of the fragile part, which hole includes a first cylindrical section adjacent the surface and a wider second cylindrical section that is further away from the surface. In the unlocked position, the diameter of the expandable bolt device is smaller than the first diameter. After insertion of the expandable bolt device into the hole, the locking element is located in the second section of the hole. In the locked position, the locking element expands to a diameter wider than the first hole section and narrower than the second hole section.

Abstract: A reversible fastening device (50) for reversibly fastening connecting means (51) connecting a first (52) and a second member (53); the connecting means (51) being housed entirely inside the first member (52); and the device (50) being characterized in that, at a first reversible stage, the connecting means (51) are moved from a withdrawn position to an extracted position projecting with respect to the first member (52); and in that the desired reversible fastening of the connecting means (51) connecting the first (52) and the second (53) member is achieved in the extracted position.

Abstract: A bolt fixing assembly comprises a bolt body, a resilient sleeve, and a pressing member. The bolt body includes a head and a shank. The resilient sleeve includes plural toothed plates integrally formed on an outer periphery thereof. Each resilient toothed plate is initially located in an interior space of the resilient sleeve and movable along a radially outward direction to a position beyond the outer periphery of the resilient sleeve. The pressing member includes a central hole for receiving the shank of the bolt body. The central hole has an inner periphery configured corresponding to an outer periphery of the shank. The pressing member includes plural ribs for respectively, selectively urging the resilient toothed plates of the resilient sleeve to the position beyond the outer periphery of the resilient sleeve.

Abstract: Dismountable clip, comprising a stem part (11), an entry end (13), and a hole edge attachment end (12), intended for insertion into a hole.

Abstract: In a plastic injection anchoring sleeve having an essentially cylindrical sleeve body with a closed front end and an open opposite end for the insertion of an anchoring bolt, the sleeve wall has a plurality of openings closed by flaps which are formed integrally with the sleeve and pivotally supported thereby at their front ends, the flaps being provided with axially extending ribs projecting radially inwardly and having inclined front and rear end portions forming ramps for lifting the flaps outwardly and out of the openings when the sleeve body is removed axially from a molding core after injection molding, or when an anchor bolt is inserted into the sleeve body.

Abstract: A component attachment apparatus is used for attaching a component in a panel hole of a panel and is formed of a grommet to be inserted into the panel hole to be incapable of rotation, and a pin. The grommet includes an insertion hole, an open part extending outwardly to cross the insertion hole, and a meeting part formed at least one side of the open part along the insertion hole. The pin includes a head part larger than the insertion hole, and a leg part extending from the head part and inserted into the insertion hole of the grommet to be capable of rotation. The leg part has a first catch elastically projecting outward from an outer perimeter of the leg part to couple in the panel hole, and a second catch positioned at a tip of the leg part for preventing escape of the leg part from the insertion hole. When the pin with the leg part is inserted into the insertion hole, the first catch is positioned in the open part to engage the panel.

Abstract: An anchor for attaching objects to a metal stud having a stud wall with inner and outer faces. The anchor has a cylindrical body having an inner end that is conical and an opening at its mid-portion. A plurality of fins extend from the anchor body adjacent the outer end, adapted to abut the outer face of a metal stud. A threaded bore extends along the longitudinal axis of the anchor body. A stud wedge is attached at its inner end to the anchor body by hinge means. The hinge means allow the stud wedge to be depressed into the opening during insertion of the anchor through a hole drilled through the wall of a metal stud, but forces the stud wedge upwardly after insertion of the anchor through the stud to lock the back side of the wedge against the inner face of the stud.

Abstract: A reversible fastening device (50) for reversibly fastening connecting means (51) connecting a first (52) and a second member (53); the connecting means (51) being housed entirely inside the first member (52); and the device (50) being characterized in that, at a first reversible stage, the connecting means (51) are moved from a withdrawn position to an extracted position projecting with respect to the first member (52); and in that the desired reversible fastening of the connecting means (51) connecting the first (52) and the second (53) member is achieved in the extracted position.

Abstract: An anchor has a hollow shank having a head at one end and an integral blade portion at the other end and formed with male threads on the outer periphery. Cuts are formed in a peripheral wall of the hollow shank to define therebetween a bendable portion adapted to bend when pushed out by a mounting screw driven into the hollow shank. The blade portion is substantially semicylindrical with side edges defining cutting edges. Ribs for inclining the mounting screw are formed on the inner surfaces of the blade portion and the hollow shaft, respectively. When a mounting screw is driven through the article into the anchor to fix an article to the board, the mounting screw is inclined relative to the anchor, so that the bendable portion is pushed out, thus preventing the anchor from rotating together with the screw.

Abstract: The invention relates to a plastic nut for inserting into a through-hole in a panel-like component, the plastic nut comprising retaining parts, of which one is designed as a flange which can be pressed onto the component from the fitting side and another is designed as snap-action hooks which can be pressed on from the opposite side and are intended for latching in behind the component, the retaining parts being provided with a nut part which has a receiving bore for a screw, the flange being a constituent part of a flange part which encloses the nut part, and it being possible for the nut part to be pressed in the direction of the flange, in which case the nut part, which can be moved axially with respect to the flange part, is pressed in the direction of the flange part by an elastic supporting arrangement which forms a spring zone, it being the case that, once the plastic nut has been inserted, the spring zone brings the nut part and the flange part into abutment against the component, different thicknesse

Abstract: An expansion dowel including a cylindrical, at least regionwise expandable dowel body (2) having a plurality of axial slots (22) opening at a front, in a setting direction(s), end (24) of the dowel body, and a bore (21) which tapers in the setting direction(s) in a region of the axial slots (22); an expansion sleeve (4) arranged inside of the dowel body (2) and tapering in the setting direction(s), the expansion sleeve (4) having a conically tapering, in the setting direction(s), bore (44), a plurality of slots extending in an axial direction, and a plurality of projections (47) projecting from an outer surface (42) of the sleeve and adapted to displace in the axial slots (22) of the dowel body (2); and an expansion member 93) axially displaceable in the bore (21) of the dowel body.

Abstract: This invention is a wall fastener to join abutting surfaces such as affixing a bracket to a wall. The L-shape arms of the fastener are attached with hinges to a shell or to a slidable nut enclosed in a shell which is inserted in a preformed hole or aperture in the wall. The fastener with arms attached to the slidable nut is adjustable for use with walls of varying widths. A screw holding the object to be attached is inserted in the shell and threaded through the nut (FIG. 4). The screw then engages the arms of the fastener and forces them to pivot into a clamping position (FIG. 5). The screw is turned until the arms are clamped against the wall (FIG. 6). The fastener with the arms attached to the shell is similar in operation to the adjustable fastener except its use is for walls or surfaces of the same width as the device.

Abstract: A plastic holder having a base and a journal formed thereon. The plastic holder further having a holding element. The holding element includes an articulating bore for receiving the journal of the base. The journal includes a smaller cross section than the articulating bore. The holding element is pivotable about the journal and positionable into a basic position and a locked position. The articulating bore partially resting on the journal when the holding element is in the locked position.

Abstract: A pin for fastening a number of floats together includes an inner pin and a stop member mounted therein. When the inner pin is rotated through an angle, the stop member extends beyond the pin for engagement with recesses defined in holed ears of the floats to thereby prevent rotational movements of the pin.

Abstract: A device for fastening together two devices (1, 30), wherein the first device (1) comprises a screw (20) with a pointed end section (26), and at least one engagement element (50) which is arranged to abut against the end section (26) and radially movable between two end positions by means of the end section (26) and in relation thereto. The second device (30) comprises a shoulder section (36) with a central opening (39), through which the engagement element (50) can be inserted when it is located in its radially inner position. The shoulder section (36) is arranged to engage with a contact section (51) of the engagement element (50) when it has been passed through the opening (39) and is located in its radially outer end position. The screw (20) is mounted rotatably, but axially immovable in relation to the frame (2), and is screwed into a nut (15), which is mounted axially movably in the frame (2) and arranged to abut against the shoulder section (36). The engagement elements (50) mounted in the nut (15).

Abstract: Methods and apparatus for securing a tie rod to a shroud support structure are described. One embodiment of the apparatus is a toggle bolt assembly including a toggle bolt body having an upper threaded portion and a lower toggle engaging portion. A toggle is rotatably secured to the toggle bolt body at the lower toggle engaging portion. A crimp nut including a threaded nut portion and a crimp collar is threadedly secured to the upper threaded portion of the toggle bolt body. Such toggle bolt assembly also includes a sleeve sized to have at least a portion of the toggle bolt body and the toggle located therein. The sleeve has a toggle opening so that the toggle can rotate from a first position in which the toggle is substantially located within the sleeve to a second position in which surface engaging portions of the toggle extend beyond the sleeve. A lower portion of the sleeve has a toggle rotation surface to facilitate rotation of the toggle.

Abstract: A vacuum compatible fastener useful for fastening a workpiece. The fastener has a head section at an upper end of the fastener of a first diameter. A shank section extends from the head section and includes a spring or spring-like element which allows the fastener to be stretched and pretensioned. The shank section has a diameter less than the diameter of the head section. A tip section at a lower end of the fastener extends from the shank section. The tip section includes one or more retractable elements having upper ends extending radially outward away from the tip section in the non-retracted state for gripping a sidewall of a workpiece receiving hole. An opening extends along the central axis of the fastener through the head section to the tip section. The fastener minimizes contamination and allows high pumpdown rates in vacuum processing tools such as semiconductor manufacturing process tools.

Abstract: The invention relates to a rivet device. The device is characterized in that it comprises a substantially cylindrical tubular body (10), an annular collar extending outwards from the first end of the body, and at least two locking elements (20, 22) formed in the body. Each locking element is constituted by an elastically deformable strip (24) cut out in the body, extending in the direction of the axis of the body, and having a first end secured to the first end of the body and a second end secured to the second end of the body, with each strip having folds (30, 32, 34) in such a manner that in an initial state a portion of the strip projects into the inside of the body and in a deformed state the strip projects to the outside of the body.

Abstract: A fastener for securing two members together through an aligned bore in the two members, the fastener comprising a longitudinally extending body having at least one opening adjacent each of respective ends thereof, the body having a central bore hole, a threaded shaft concentrically disposed in the central bore hole and having opposite threads at each end, with a rotation applying member at an accessible end, a nut provided on each of the opposite threads in threaded engagement with the respective thread, at least one longitudinally extending engaging finger attached to each of the nuts and disposed adjacent a respective one of the openings, the fingers being adapted to extend through the respective opening when the shaft is turned in a first direction to cause the nuts to move toward each other, thereby causing the fingers to engage, when the openings at each end are disposed in the aligned bore adjacent different ones of said two members to be secured together, with respective ones of said two members, ther

Abstract: A reusable anchor apparatus removably securable to a panel. The reusable anchor apparatus includes a housing having an inner end, an outer end, a longitudinal axis extending therebetween, and a restraining member preventing insertion of the housing completely through the panel. The reusable anchor further includes a first finger pivotally coupled to the inner end of the housing, a second finger pivotally coupled to the inner end of the housing, opposing the first finger, and a plunger for moving the first finger and the second finger between a retracted position in which the fingers extend substantially parallel to the longitudinal axis, and an extended position in which the first finger and the second finger are substantially upright with respect to the longitudinal axis in opposing directions.

Abstract: A screw grommet 1 which is capable of dealing with a change in the thickness of panel comprises a grommet member 3 and a holding member 2 to hold the grommet member. The holding member comprises a flange formed larger than a mounting hole of a panel 33 and a leg portion 4 which extends downward from the flange, is formed with, in its center, a space to receive the grommet member, and passes through the mounting hole of the panel so as to extend to the bottom side of the panel. The grommet member 3 comprises a head 17 which is fixed so as to be prevented from vertical movements when received in the leg portion of the holding member, a tubular portion 19 which is received vertically movably in the leg portion of the holding member and is formed with a hole for a tapping screw 5 to be screwed thereinto, and a pair of connection arms 20 which connect the tubular portion to the head and bend so as to project radially outwardly in mid portions 25 thereof when the tubular portion is brought closer to the head.

Abstract: A parts fastener has a body having at one of its ends a flanged head projecting from the body. For that purpose the body evinces a central cavity communicating with the outside and includes at least a wall portion of which the inner side bounds part of the cavity, and which elastically deforms under an external force applied to the wall portion. The wall portion has, on its outer side, a projection which together with the head flange bounds a jaw by means of which the fastener may be inserted into the part to which it must be affixed. The projection opens on account of the deformation of the wall portion and frees the part and the fastener from each other. The device may also include means to cause the deforming force from the outside.

Abstract: A device for securing at least two elements together by means of a screw (3) and a transfer nut (4) adapted to be engaged in the recesses (1a, 2a) of said elements (1, 2) is characterized in that the transfer nut (4) includes a nut plate (6) having a threaded hole (7), on either side of which are located areas (8, 9) for the passage of the arms (10, 11) of a fastening unit (12) having a generally flare-shaped U cross section. The intermediate portion (13) of the latter includes a hole for the passage (14) of the screw (3) opposite the threaded hole (7) of the nut plate (6) and is adapted to be applied against a stop surface of the screw (3) or of the element (1) on which said screw rests, such that the nut plate causes the arms (10, 11) of the fastening unit (12) to be spaced apart and abuts on a contact surface of the other element (2) during screwing, in order to secure the elements together.

Abstract: A pin (101) for alignment of two elements (1, 3) each comprising at least one orifice (2, 4) to be positioned coaxially with each other, the first element (1) being stationary and the second element (3) being radially displaceable. The alignment pin comprises a cage (11) having a diameter smaller than the diameter of the orifices (2, 4) of the two elements (1, 3) and intended to be placed in these orifices (2, 4). The cage (11) comprises radial expansion blocks (13) for centering the pin (10) in the orifice (2) of the first stationary element (1) forming a reference and for displacement of the second element (3) in relation to the first element (1). The pin is used for centering a cover on a nuclear reactor vessel.

Abstract: A radial arm saw having a support table below the saw is arranged to receive a support sleeve directed through the support table, with the support sleeve adjustably mounting a positioning rod shaft therethrough orthogonally oriented relative to a top surface of the support table. A workpiece is arranged to rotatably mount upon a first end of the positioning shaft to permit manual rotation of the workpiece in engagement with a saw blade of the radial arm saw. In this manner, a circle may be formed from a workpiece plate.

Abstract: An expansible anchor bolt construction (10) including: a hollow cylindrical housing (20) equipped with a pair of pivoted anchor wings (12), which are forced into an expanded disposition relative to the housing (20) by the passage of a threaded bolt (13); and, a locking collar (14) disposed within the housing (20) and adapted to be engaged by the threaded bolt (13) to draw the locking collar (14) into captive engagement with the anchor wings (12).

Abstract: A screw grommet with which an externally threaded member is threadedly engaged in a state in which the screw grommet is inserted through an attaching hole formed in a member to which the screw grommet is to be attached. An externally threaded member is passed through a head having a through hole, and the head abuts against the member to which the screw grommet is to be attached. The externally threaded member is then inserted through a leg which projects from the head and is inserted through the member to which the screw grommet is to be attached. The externally threaded member is threadedly engaged with an internal thread member. A pair of pawls are formed on a part of the internal thread member and are, together with the internal thread member, inserted in the leg in a state in which the diameter of the pawls is reduced. When the internal thread member approaches the head, the diameter of the pawls is enlarged in such a manner as to clamp the member to which the screw grommet is to be attached.

Abstract: The expansible plug for fixing an element or frame member on solid or hollow building material, has a plug shank (1) having a plurality of expansion discs (3,4) arranged one after the other along the plug shank (1). The expansion discs (3,4) are provided with eccentric bores (12,13) located so that, without the fixing screw (23) inserted, the bores (12,13) of adjacent discs (3,4) are noncoaxial or staggered with respect to one another and overlap one another and so that the overlapping bores (12,13) form a constricted screw hole (15) through the plug shank (1). When a fixing screw (23) is screwed into the expansible plug the expansion discs (3,4) are displaced laterally so that the bores (12,13) in the expansion disks have a coaxial relationship and the expansion disks (3,4) are displaced laterally outwards from the plug shank to secure the expansible plug in a hole in which it is located.

Abstract: Toggle bolt having an anchor screw threaded over at least a portion of its length, on whose end which is to be anchored in the cavity a toggle is mounted for pivoting between the legs of a shackle, between an insertion position aligned with the anchor screw and a locking position in which it lies across the axis of the latter.

Abstract: An article retention arrangement utilizing a drive-in expansion fastener having a generally cylindrical, hollow body with a tapered end formed from an angular truncation of the body. The body is reinforced by one longitudinal rib so as to permit drive-in penetration from the tapered end even if the fastener is formed from plastic materials. The fastener is retained within the wall by at least one pair of hinged flanges which expand circumferentially in response to the installation of an insertion element within the hollow portion of the body. The insertion element engages an inclined surface within the body to cam the expansion flanges circumferentially outward. The expansion flanges engage the back surface of the wall while the longitudinally slit portion of the body expands within the hole created by drive-in penetration. The insertion element preferably includes an enlarged head projecting from the fastener when the insertion element is fully installed within the fastener.

Abstract: A clamping apparatus for clamping an object to a member having an opening therein and marginal portions defining, in part, said opening. The apparatus includes a first member engageable with the object and having a first threaded portion. The first threaded portion is in threaded engagement with a second threaded portion complementary to the first threaded portion, the second threaded portion being on a base member having first and second opposite side portions. The apparatus further includes engaging members for engaging the marginal portions adjacent the opening, the engaging members having distal and proximal end portions, the proximal end portions being pivotally connected to the first and second opposite side portions of the base respectively. The distal end portions have respective contact surfaces for engaging the marginal portions about the opening.

Abstract: A fastener includes a female body and male body. By forcibly inserting the male body into a male body insertion hole of the female body, the two bodies are temporarily coupled together. By further inserting the male body into the female body from this state, leg portions of the female body are caused to flare outwardly so that overlapped plates are fastened together between the flared leg portions and a head portion of the female body. By further inserting the male body into the female body from this state, the leg portions are released from the flared state, so that the plates can be unfastened. When and only when the leg portions are inserted through a hole of a plate to be fastened by means of the fastener disposed in the temporarily coupled state, can the male body be further inserted within the female body so as to fasten the two plates to each other.

Abstract: A drive-in expansion fastener is provided having a generally cylindrical, hollow body with a tapered end formed from an angular truncation of the body. The body is reinforced by at least one longitudinal rib so as to permit drive-in penetration from the tapered end even if the fastener is formed from plastic materials. The fastener is retained within the wall by at least one pair of hinged flanges which expand circumferentially in response to the threaded insertion of an ordinary screw within the hollow portion of the body. That screw engages an inclined surface within the body to cam the flanges outwardly. The flanges engage the back surface of the wall while a longitudinally slit portion of the body expands within the hole created by drive-in penetration.

Abstract: An expansion dowel assembly includes a sleeve-like support bearing incorporating load engagement surfaces, and annular disks displaceably held on the support bearing by a tension member for displacement between a radially inwardly displaced position and a radially outwardly displaced position. The annular disks are formed of a spring-like material. The tension member clamps the disks in the radially inwardly displaced position in the form of a hollow cone. When the clamping force on the disks is removed, because of their spring-like characteristic, they move into the radially outwardly displaced position flattened out from the hollow cone configuration. A load can be applied to the support bearing at the load engagement surfaces.

Abstract: An anchor for attaching cables or other devices to a wall structure comprises a hollow metal cylinder having a pair of wing members pivoted within the cylinder and extending through opposing openings in the sides of the cylinder. The wings are spring biased to their collapsed positions in the cylinder and are extended by the pressure of a bolt threaded in one end of the cylinder. The wings may be forced by the bolt to wedge the cylinder in a concrete or other solid wall, alternatively may be extended in back of a panel wall for retaining the anchor in place.

Abstract: An anchoring device comprises an elongate tubular body, a plunger axially movable in the bore of the body to operate gripping means in the form of transverse dog plates which axial movement of the plunger causes to project through openings in the body to engage the surface of a hole drilled in a structure to which the device is to be secured.The anchoring device may be a wall tie with gripping means at each end to engage co-axial holes in two leaves of a cavity wall. Alternatively one or each gripping means may be replaced by a waisted, windowed portion of the wall of the body to be secured in the hole by synthetic resin. Means may be provided for connecting a grip-testing device to the wall tie and a modification allows the grip of one gripping means to be tested before the other is operated.

Abstract: A drive-in expansion fastener is provided having a generally cylindrical, hollow body with a tapered end formed from an angular truncation of the body. The body is reinforced by at least one longitudinal rib so as to permit drive-in penetration from the tapered end even if the fastener is formed from plastic materials. The fastener is retained within the wall by at least one pair of hinged flanges which expand .Iadd.or move .Iaddend.circumferentially .Iadd.apart .Iaddend.in response to the threaded insertion of an ordinary screw within the hollow portion of the body. That screw engages an inclined surface within the body to cam the flanges outwardly. The flanges engage the back surface of the wall while a longitudinally .[.slit portion.]. .Iadd.split length .Iaddend.of the body expands within the hole created by drive-in penetration.