Abstract: An anchor having a sleeve, a bolt which passes through the sleeve and at least one expansion element that is positioned in front of the sleeve and that is axially supported on the sleeve, whereby the bolt has an expansion area for the expansion element, is provided. According to the invention, it is provided for the sleeve to have a wavy shape with axial wave peaks in which the outer radius of the sleeve as well as the inner radius of the sleeve each have a maximum, and with wave valleys in which the outer radius of the sleeve as well as the inner radius of the sleeve each have a minimum.

Abstract: An expansion anchor includes a bolt as a first element and an expansion part as a second element. One of the two elements has a first rib running longitudinally along the bolt and the other of the two elements has a first groove running longitudinally along the bolt, where the first rib engages in the first groove. The one of the two elements has a second rib running longitudinally along the bolt and the other of the two elements has a second groove running longitudinally along the bolt, where the second rib engages in the second groove. A first catch of a snap connection is formed between the first rib and the first groove and a second catch of the snap connection is formed between the second rib and the second groove, where the first catch and the second catch hold the expansion part radially to the bolt.

Abstract: A method for anchoring an expansion anchor in a borehole is disclosed. The expansion anchor includes an anchor bolt and an expansion body on a first terminal section of the anchor bolt, an actuator disposed on a second terminal section of the anchor bolt, and an expansion sleeve disposed around the anchor bolt. In an embodiment, the method includes hammering the expansion anchor into the borehole in an insertion direction and actuating the actuator to screw the expansion body outwardly in a direction that is opposite the insertion direction such that the expansion sleeve is expanded radially outwardly and digs into a wall of the borehole and such that the expansion body digs into the wall of the borehole.

Abstract: An expansion anchor is disclosed. The expansion anchor has a bolt having a neck region and an expansion region adjoining the neck region in which the bolt tapers down towards the neck region. The bolt has a groove in the neck region which extends along the bolt, and is at least partially surrounded by an expansion sleeve, and which has on its inside a web. The web at least partially engages in the groove in the neck region and the wall thickness of the expansion sleeve is increased locally by the web. The expansion sleeve is displaceable under radial expansion of the expansion sleeve along the bolt from the neck region into the expansion region. The web, on displacement of the expansion sleeve from the neck region, at least by region, passes into the expansion area and is forced radially outward by the expansion region.

Abstract: The invention relates to a yieldable rock anchor comprising an anchor element extending along a longitudinal center axis and having a first end, a second end and an outer surface. An anchor plate is attached near the first end of the anchor element, and an anchor head is secured to the first end of the anchor element and adapted to clampingly engage the anchor plate. On its outer surface, the anchor element is provided along at least substantially its entire length with a plurality of ribs. A plurality of sleeves, each sleeve having two opposing ends, for covering some of the plurality of ribs is fixedly arranged on the outer surface of the anchor element such that each of the opposing ends at least substantially sealingly engages the outer surface of the anchor element.

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

Abstract: An exemplary latching mechanism (10) includes a detachable member (12), an elastic member (18), a positioning member (20), a rotatable member (22), and a base (24). The detachable member has a pair of clasping portions (124) and a pair of actuators (126). The elastic member is disposed between the positioning member and the detachable member for providing elastic force. The rotatable member is disposed on the base. The rotatable member includes a plurality of pedals (226) for engaging with the actuators of the detachable member and a plurality of latching portions (224) for abutting the clasping portions of the detachable member. The positioning member engages with the rotatable member. When the detachable member is pressed, the detachable member can be latched on or detached from the base.

Abstract: A blind rivet for a threaded joint between a support member and a mounting member consists of a body of elastic material and a sleeve of metallic material. The body is formed as a sleeve-shaped shank adapted to be inserted into a mounting hole of the support member. The shank has a mounting flange and a folding zone adapted to be folded into a fold by a folding operation. The mounting flange and the folding zone are adapted to be supported against opposite sides of said support member. The sleeve of metallic material is disposed within the body. There are provided means for preventing twisting and torsional deformation of the body.

Abstract: A jointing member has a grommet and a pin. The grommet includes a flange portion and a leg portion capable of being opened, in which an insertion hole is formed from the center of the flange portion to the inner portion of the leg portion, and an engagement portion is formed at the inner surface of the leg portion. The pin includes a head portion and a shaft portion to be inserted into the insertion hole, in which an engagement surface and a lock surface each engaging with the engagement portions are formed at the shaft portion. In the jointed and fixed state of panel members, when an unexpected external force is applied to the tip end of the shaft portion of the pin, the engagement portion engages with the lock surface of the pin.

Abstract: The clip 1 comprises a hollow bushing 6 with a flange 10 and a shank 11, and a pin 5 with a shank 9 inserted into the bushing 6. The pin shank 9 is inserted into the bushing shank 11 to enlarge the bushing shank 11 so workpieces 2, 3 are connected to each other by the enlarged section of the bushing shank 26 and the bushing flange 10. A guide 13 extending from the end of the bushing shank so the pin shank is inserted into the bushing shank 11 without enlarging the bushing shank is formed in the end of the pin shank 5. The guide 13 has a large diameter section 14 larger than the end of the bushing shank. The diameter of the large diameter section 14 is formed so as to be larger than the diameter of a thick section 26 of the creep-deformed bushing shank when enlarged by the pin shank.

Abstract: A fitting for connecting two structural components, particularly plates, includes a clamping device mounted in the first structural component and an expanding sleeve which can be secured to the second structural component. A bolt is arranged in the expanding sleeve so as to be longitudinally movable by the clamping device for expanding the expanding sleeve using a conical portion of the bolt. The conical portion of the bolt is an approximately cone-shaped projection whose longitudinal axis is laterally offset relative to the longitudinal axis of the bolt.

Abstract: An apparatus for an expandable screw including an outer screw, a inner screw, and an end nut. An assembly and method for driving and expanding an expandable screw apparatus into a surface or structure. The assembly and method dynamically expand the expandable screw by driving and expanding the expandable screw simultaneously.

Abstract: A wedge anchor has a shank with an expander section having a surface that forms an angle greater than 8° with respect to an axis of the shank. A plurality of longitudinal ribs project radially and outwardly from the expander section, extend along the axis of the shank, and are angularly spaced apart from each other. A tubular expansion sleeve is sleeved on a neck section of the shank adjacent to the expander section, and is formed with a plurality of axially extending slits for engaging the longitudinal ribs when the expander section is extended into the expansion sleeve.

Abstract: The grommet assembly includes a grommet head and a pin. The pin includes longitudinal guide channels and an enlarged head which may include undercuts formed immediately underneath the enlarged head. The grommet head includes grommet segments secured radially by radial bands with a nose band forming the tip of the grommet head. An aperture is formed between the grommet segments, with guide ridges formed on the interior arcuate walls to engage said longitudinal guide channels. The aperture further includes inwardly ramped surfaces which are forced apart by the enlarged head of the pin during insertion. Thereafter, in the fully installed position, the inwardly ramped surfaces engage the undercuts formed beneath the enlarged head.

Abstract: A spreading anchor including an anchor rod (2) having a stem (12) provided at its front end, when viewed in a setting direction, with a cone (3) widening outwardly towards its free end and a longitudinally displaceable sleeve (4) pushed over the anchor rod (2) and having at a front end (8) cutting tabs (5) which are provided with cutters, are separated from each other by gaps, extend from a plastic hinge (11) toward the cone (3), and are spread radially upon sliding of the sleeve (4) over the cone (3), the sections of the cutting tabs (5), which extend from free ends thereof in a direction toward the plastic hinge (11), having an outer surface (6) remote from the cone (3) and formed at least in their cutting region thereof as a substantially toroidal surface.

Abstract: An expanding wall plug including a headed anchoring socket adapted for mounting in a hole in a wall; a screw inserted through the anchoring socket and having a head received in a tapered hole at one end of the anchoring socket, an expansion shell mounted around the screw and abutted against the anchoring socket, having two wedge blocks and an outer thread or ribs at two opposite ends for anchoring, and two opposite longitudinal slots at one end, and a conical tightening up device mounted around the screw rod and forced forwards to squeeze the locating expansion shell against the anchoring socket axially upon rotary motion of the screw rod, the conical tightening up device having two wedge blocks symmetrically raised from the periphery and respectively forced into the longitudinal slots of the locating expansion shell.

Abstract: A device for fastening to the body of a motor vehicle an assembly comprising a support plate, is of the type comprising a bolt-and-nut assembly. The threaded shank of the bolt passes through a hole in the support plate, a hole formed in a damping ring which is interposed between the support plate and a first face of a bodywork element of the vehicle, and a hole in the bodywork element itself. The bolt is screwed into a nut which is located beyond the opposite face of the bodywork element, and which is received in a nut retaining cage. The damping ring and the cage are made integrally with each other as a single assembly member of elastomeric material or rubber; the portion of this assembly member that defines the cage deforms in expansion while the nut is being tightened on to the bolt.

Abstract: A rock bolt shell and cone. An expansible shell having a cylindrical outer surface and raised ridges in relief on the exterior of the shell. One or more ridges are located along a curve non-congruent with a circumferential circle of the cylinder. In a disclosed embodiment, each ridge lies along a helix of the cylinder and ridges are paired such that the helix of a first extends in one rotational direction while the curve of a second of the pair extends in the other rotational direction. Each helix forms an angle of forty-five degrees with a center line of the cylinder. Ridges intersect such that "V"-shaped projections extend along the outside of the shell. The vertices of certain of the projections project a radially maximum amount while each of the legs of the "V" taper radially inwardly toward the cylindrical surface as the leg extends away from the vertex. The cone, threaded for installation on a bolt rod has one or more axial indentations to improve grout flow about an installed bolt.

Abstract: A locking bolt consists of a main bolt with a through hole extending axially along its center line, a deforming bolt rotatably mounted in the through hole in the main bolt, and a nut which is screwed onto the end of the deforming bolt. At least one slit is provided in the end of the shaft of the main bolt, and when the nut is tightened the deforming bolt expands the end portion of the shaft of the main bolt. At the end of the shaft the through hole in the main bolt is provided with a tapered hole portion of which the diameter decreases gradually from the tip of the shaft toward the head of the main bolt, and the head of the deforming bolt is tapered so that it fits into the tapered hole portion. When the nut is tightened, the deforming bolt jams the thread on the end portion of the shaft of the bolt against the thread of the bolt hole, and thereby prevents the bolt from becoming loose.

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: An expansion assembly for use with resin on a mine roof bolt includes an expandable shell and a camming plug having a first end wall spaced from a second end wall by a tapered body portion. Four equidistantly spaced grooves extend longitudinally in the tapered body portion. Pairs of grooves are connected across the second end wall by transverse grooves that form resin flow channels. A rib formation extends outwardly from the side wall adjacent to and removed from a groove. The rib formation defines the edge of the groove and abuts an edge of one of the fingers of the expandable shell to align the grooves of the plug with the respective slots formed between the shell fingers. This alignment assures unobstructed flow of the mixed resin downwardly through the plug grooves and shell slots into surrounding relation with the expansion assembly for secure bonding of the assembly with the walls of a bore hole.

Abstract: The invention concerns a multi-part dowel with an outer body (2), which has an approximately cylindrical shank (4) and an inner body (12). In the position of use, the outer body (2) and inner body (12) engage with each other in the same way as a multiple screw-thread. The outer body (2) has, in its solid shaft (4), helical grooves (8) which are positioned to form a star when viewed in cross-section and which form an internal screw-thread. The inner body (12) has matching helical ribs (14) also positioned to form a star. The pitch of the thread is greater than the length of the thread. In what is the front section of the outer body (2) when the dowel is used, the grooves themselves, or slots (10) aligned with them, extend to the outer wall of the outer body (2). The dowel can be used for fixing building materials, such as woven textile or fibre-glass materials, to outside walls, interior walls or ceilings.

Abstract: A nut fastener device for a blind hole anchor (FIG. 2) has the nut 14 made frusto-conical with the smallest diameter knurled at 30 and with the largest diameter provided with relieved and back tapered flanks 20. The nut is made integral with a sleeve 10 having flange 12 and a further knurled zone 32, and a sheer zone 16 between the sleeve and nut. During the installation the nut is pulled into the sleeve to expand the sleeve and deform it to the cross sectional shape of the nut so as to provide an angular fix. The sleeve is effectively fixed to the sheet material by the flange on the one side and the deformation of the sleeve on the other side of the sheet. The knurled bands which become axially aligned increase the angular hold of the device in the sheet and of the nut in the sleeve.

Abstract: The utility of a cover for vents or drains is improved by having a unitary, integral fastening means which can be used to either secure the covering so securely that mutilation of the cover may be required to remove the cover or that the cover may be easily removed and replaced. The cover can be formed from any polymer with any desired surface configuration, i.e., hole size and shape, and can be used to modify existing covers or as the original cover for a hole or vent. The fastening means when integral is made of the same material as the cover and can be easily expanded and secured by pressure elements. Since the normal sleeve has been replaced by the integral fastener which is part of the cover, no relative rotation of the sleeve and pressure means can occur.

Abstract: A one-piece, malleable iron, expansion shell, and a leaf of such shell, for use in an expansion to be installed in a relatively small (about 1") diameter bore hole with a conventional size (5/8") bolt. The expansion shell, and individual shell leaves have unique features contributing to the effectiveness of the anchor when used either with or without a resin grouting mixture. The slots or spaces between adjacent shell leaves include upper and lower portions, each of constant width, the lower portion being wider than the upper portion, whereby the leaves are narrower in the area where they are bent outwardly from the closed ring at the base than in the area where they are compressionally engaged between the plug and the hole wall. Upper portions of the inner leaf surfaces taper toward the shell axis and the side edges of such surfaces taper toward one another from the upper, free ends of the leaves toward the lower ends.

Abstract: A two-piece, malleable iron, expansion anchor for installation in a relatively small (about 1") diameter bore hole with a conventional size (5/8") bolt. The four-prong expansion shell, camming plug, and individual shell leaves each have unique features contributing to the effectiveness of the anchor when used either with or without a resin grouting mixture. The slots or spaces between adjacent shell leaves include upper and lower portions, each of constant width, the lower portion being wider than the upper portion, whereby the leaves are narrower in the area where they are bent outwardly from the closed ring at the base than in the area where they are compressionally engaged between the plug and the hole wall. Upper portions of the inner leaf surfaces taper toward the shell axis and the side edges of such surfaces taper toward one another from the upper, free ends of the leaves toward the lower ends. An axial rib extends outwardly from the surface of the camming plug over its entire length.

Abstract: The utility of a cover for vents or drains is improved by having a unitary, integral fastening means which can be used to either secure the covering so securely that mutilation of the cover may be required to remove the cover or that the cover may be easily removed and replaced. The cover can be formed from any polymer with any desired surface configuration, i.e., hole size and shape, and can be used to modify existing covers or as the original cover for a hole or vent. The fastening means when integral is made of the same material as the cover and can be easily expanded and secured by pressure elements. Since the normal sleeve has been replaced by the integral fastener which is part of the cover, no relative rotation of the sleeve and pressure means can occur.

Abstract: A re-usable plastic drive rivet is of the type comprising an axially extending shank in association with an axially extending drive pin which is axially drivable into a bore extending axially through the shank. In order to permit release of the entire drive rivet by means of an unscrewing operation, without damaging the workpieces to which the drive rivet is secured, the outer surface of the shank has a thread formation thereon with the outer surface of the drive pin having a non-cylindrical outline complementary to a similar non-cylindrical peripheral outline of the interior wall of the bore. The non-cylindrical outlines can be substantially cylindrical apart from inter-engagable axial ribs and grooves. The shank can be integrally formed with the drive pin through means of frangible connections, but alternatively the shank can be preassembled with the drive pin by inserting the drive pin into the bore through the shank.

Abstract: An expander device for anchoring in a hole to secure a castor to a part which forms the hole, comprises a conical expander engaged in a sleeve having a conical interior. The expander and the sleeve are mouldings of reinforced plastics material. The expander is screwed onto a coaxial bolt with a 3-start thread. The sleeve is axially slotted from either end, the slots from one end being angularly spaced from one another by 90.degree. as are the other slots with which they are assymetrical so that alternate major and minor sleeve portions are formed between adjacent slots. Deformation takes place predominantly in the minor portions as the sleeve is expanded by axial movement of the conical expander into the internal taper of the sleeve which is caused by rotation of the bolt.

Abstract: An anchoring system in concrete having a predrilled hole with an undercut. The anchoring system includes a cylindrical rod that is threaded at one end and has a trunk conical head at the other end. A sleeve extends over the lower portion of the cylindrical rod above the trunk conical head. The cylindrical rod is inserted into the hole so that the sleeve is adjacent to the undercut. The sleeve is fixed against being subsequently withdrawn. The cylindrical rod is then rotated relative to the sleeve thereby lifting up the trunk conical head into the sleeve so as to press against and thereby expand the sleeve outward against the walls of the undercut.

Abstract: An anchor for use in slab facings comprises an anchor bolt (2), which has an inner end that is adapted to be inserted into and to be embedded in mortar in a hole (6) formed in a wall (7) to be faced and an outer end provided with a transverse rod (1) for insertion into at least one bore formed in at least one edge face of at least one facing slab (9). To ensure that the anchor can be economically fixed and that the facing slabs can be mounted quickly, the anchor bolt (2) is provided at its inner end with a cylindrical enlarged portion (4), which has an embossed or channeled peripheral surface, and the anchor bolt is provided between the transverse rod (1) and the enlarged portion (4) with a driving sleeve (3), which is slidably mounted on the bolt and has a serrated or finned surface, which is larger in outside diameter than the enlarged portion (4).

Abstract: A resin reinforced expansion anchor system for a mine roof support bolt or the like utilizes a specially configured, thin-walled expansion shell together with a thin-walled, dual-taper plug for expanding the shell. The shell and the plug cooperate to implement a particularly desirable type of mechanical expansion anchoring action while simultaneously providing a symmetrical array of resin flow passages at circumferentially spaced locations about the anchor assembly to permit proper distribution and flow of a quick setting resin mix. The system of the invention enables a relatively large diameter rock bolt or threaded bar to be securely anchored in a blind drilled hole that is of relatively small diameter, with the anchoring action of a mechanical expansion anchor assembly being desirably augumented by the anchoring action of a concurrently established resin bond.

Abstract: The utility of an expansion fastener including an externally threaded shaft having a head shaped so as to be capable of being engaged by a manipulative tool, a generally cylindrical longitudinally split sleeve located around the shaft, a nut threaded on the shaft, the sleeve and the nut including coacting surfaces capable of expanding the sleeve as the nut is moved on the shaft can be improved by utilizing coacting structures on the end of the sleeve remote from the head and on the nut for preventing relative rotation between the sleeve and the nut as the shaft is turned. Preferably the sleeve is twisted slightly in a spiral-like manner so that an end of the sleeve serves as one of the coacting structures which engages an adjacent ridged or other not smooth surface of the nut serving as the other coacting structure.

Abstract: An anchor bolt is arranged to be secured in a relatively deeply drilled hole having a conical enlargement adjacent the base or inner end of the hole. The anchor bolt is formed of an axially elongated tie rod and an anchor located on the end of the tie rod which is inserted into the base of the drilled hole. The anchor is made up of a number of radially expandable sleeve segments. The anchor also includes a cone element for expanding the sleeve segments radially outwardly into the conical enlargement in the hole. The sleeve segments have an outside radius variable in the axial direction of the segments. The radially outer surface of the segments is substantially smooth for their axial length. At the smaller diameter end of the sleeve, the segments are held together by an annular elastic disc.

Abstract: A plastic screw anchor for fastening fixtures and other objects to a hollow wall, the anchor including a four-legged diamond-shaped shank whose front legs are joined together by a front apex living hinge and whose rear legs are joined to the front legs by side apex living hinges, the ends of the rear legs defining a rear apex. Secured by a pair of normally outstretched resilient webs to the rear legs of the shank is a flanged socket whose bore lies in registration with an opening formed in the front apex hinge. The diamond-shaped shank is collapsible to form a tongue that is insertable in a hole drilled in the wall to accommodate the socket, the webs then reverting to their outstretched condition to cause the shank which is now behind the wall to recover its diamond formation. When a self-tapping screw is turned into the socket bore, it acts to thread the bore.