Abstract: An anchor module, in particular for mining and tunneling, is provided. The anchor module comprises a drill bit having a drill section and a connecting section. The anchor module also comprises an anchor rod made of plastic, extending along an anchor axis and having a connecting section for fastening the drill bit in the area of the one axial rod end, such that the outside diameter of the drill bit is larger than the outside diameter of the anchor rod on the connecting section, wherein the outside diameter of the drill bit is at most about 20%, in particular embodiments at most about 10%, and/or at most about 10 millimeters larger than the outside diameter of the anchor rod on the connecting section.

Abstract: An expansion wedge anchor (80) for insertion in a hole (H) delimited by a wall comprises an expander member (32) and an expansion number (34), the expander member being provided at a leading end of the expander member, the expander member comprising a flaring end (40), the expansion member being expandable at a trailing end (48) thereof and being adapted to engage the wall of the hole when the expander member is positioned in the hole, wherein upon longitudinal withdrawal of the expander member from the hole, the expander member displaces longitudinally relative to the expansion member with the flaring end thereof gradually causing the trailing end of the expansion member to expand, whereby a trailing edge of the expansion member engages the wall of the hole. The trailing end is adapted, when expanded by the flaring member, to extend at an angle with respect to a longitudinal axis of said expander member.

Abstract: An expandable anchor assembly is provided for anchoring the threaded end portion of an elongated roof bolt in a borehole. The anchoring assembly includes a hollow outer sleeve in the form of a plurality of symmetrically arranged, longitudinal segmented wall portions with exterior gripping teeth and an inner expander sleeve in the form of a corresponding plurality of longitudinal wall portions symmetrically arranged about a central axis to define an inner threaded cylindrical section. The inner sleeve is captured within and moveable axially relative to the outer sleeve. As the threaded end portion of the elongated bolt is inserted into the inner threaded cylindrical section of the inner sleeve from the trailing end to the leading end thereof, the inner sleeve expands over and clamps around the threaded end portion of the elongated bolt.

Abstract: A connection device for toy construction sets comprises a cylindrical socket and a bolt-like locking element inserted therein. The socket is inserted into the bores of the construction elements to be connected and is provided at one end with a radially protruding outer edge shoulder as a retaining member as well as longitudinal slots. The locking element (9) is rotatable within the socket, but fixed axially and rotation of the locking element causes the socket to lock within the construction element.

Abstract: A locking device for use with a video cassette tape to prevent unauthorized usage in view of its content. The device incorporates a member that is expandable into certain recesses of the cassette when placed into a locking mode and, is not expanded when the cassette is in a non-locking mode. A specialized key is utilized with the device to prevent its duplication.

Abstract: An expanding plug comprises in usual manner an expanding sleeve, an expanding screw and an expanding cone which serves to expand the expanding sleeve and which can be pulled into the expanding sleeve by means of the expanding screw. So as to reduce the material need for the expanding cone and the manufacturing expenditure, the expanding cone is bent from metal sheet. Its edge surfaces of its wall limiting a joint gap extend in the direction to the central longitudinal axis and tangentially to the latter bear unconnected and flush against each other. The expanding cone formed with relatively thick walls comprises hardened surface regions and an unhardened basic region.

Abstract: A dowel-like device is described for locating a component (1) having a through-bore (33) relative to a reference part (2) provided with a bore (34), the through-bore and the bore having the same inside width. In order for the dowel to permit an accurate, repeatable positioning of the component on the reference part without loss of precision, it is provided with a cylindrical bushing (3), which is elastic in a radial direction at least over part of its length and is internally conical. A rotatable bolt (9) extending axially into the conical bushing section (4) is locked against movement in the axial direction and cooperates with a cone member (7) which extends into the conical bushing section, so that upon rotation of the bolt, the cone member moves axially, causing its exterior surface to push outwardly against the bushing. This expands the bushing into firm contact with the wall of the bores in the component and the reference part.

Abstract: The present invention relates to expansison anchors for solid wall installation and is specifically concerned with providing a self cutting expansion anchor which can be installed in one continuous motion by utilizing combined cutting blades and wall gripping members which cut their own undercut portion within a wall bore into which the gripping members are then permanently further expanded in positive locking engagement. Such dual-stage installation is achieved by utilizing an anchor mounting assembly having a pair or opposite-hand screw-threaded portions thereon which separately mount a blade expanding thrust member and a camming ramp on which the blades are initially expanded by axial movement of the thrust member toward the ramp and in the second stage causing the ramp to axially move toward the thrust member in further expanding relation to the blades.

Abstract: A unitary thick walled spacer S supports an anchor rod (15) for engagement in an expansion body (6). The tubular spacer S has a first part P of greater diameter than its remaining part P', with the part P' in slide fit engagement in the expansion sleeve (1), and the part P abutting, at its free end, a washer (17) and the head of the anchor rod (15). An annular rim M formed between the parts P and P' of the spacer S, is arranged, prior to use, a distance X from the expansion sleeve (1). As clamping down is performed in a receiving socket, the spacer part P' slides inside the expansion sleeve so progressively closing the gap X. The arrangement is so designed that in any particular application, the rim M at most just barely comes into contact with the expansion sleeve (1) so avoiding uselessly and detrimentally loading the spacer S.

Abstract: A wheel cap mounting apparatus for mounting a wheel cap on a disk wheel includes a retainer to be fixedly mounted on the disk wheel, and a bolt for holding the wheel cap to the retainer. The retainer includes a body portion having a throughhole and a nut embedded in the body portion by molding. The threaded hole in the nut aligns with the throughhole in the body portion. A small-diametered insert section is connected to the body portion and adapted to be inserted into an opening formed in the disk wheel. The small-diametered insert section has a hole formed therethrough, which is in alignment with the throughhole formed in the body portion. The retainer further has claws formed integrally with the small-diametered insert section such that the claws project radially outwardly from the small-diametered insert section.

Abstract: A securing device for securing in cavaties and comprising a number of clamping jaws (11), provided under influence of a changeable tension body (21) to expand against opposite wall portions (13) in said cavity. The clamping jaws (11) have engagement surfaces (12) which are forced outwards and tension surfaces provided to cooperate with a tension surface (22) of the tension body. By means of a displacement motion of the clamping jaws relative to the tension body is brought to adjust the clamping jaws between an inner releasing position, and an outer expanded securing position. The device comprises a spring mechanism (4) provided to press the clamping jaws (11) in direction against the tension body (21). Between the clamping jaws and the tension body a distance element (20) is positioned being provided to maintain in its releasing position a predetermined distance between a support surface (19) of each clamping jaw and a surface (23) of said distance element.

Abstract: An expansion anchor for mounting in a receiving socket in base material to enable an object to be clamped thereto. The anchor comprises a longitudinally split tubular sleeve (1) to which an internally threaded expansion body (6) is retained by means of lugs (10) thereof engaging slots (2,3,11) in the body of the sleeve (1). The slots (2,3,11) are provided to permit the tubular sleeve (1) to expand into gripping contact with the receiving socket as the expansion body (6) is drawn axially within the sleeve (1) by a threaded anchor rod (15). The sleeve (1) is provided with support means (8,12,13,14) for the anchor rod (15) when in engagement with the expansion body (6). The support means (12,13,14) constitute telescopic spacer elments between the head of the anchor rod (15) and the tubular sleeve (1) which allow free relative movement between the expansion body (6) and the head of the anchor rod (15) until the anchor is set in the receiving socket.

Abstract: A stud anchor is provided for securing to an associated mounting bracket a non-round hollow extension having planar inner wall surfaces which are parallel to a longitudinal axis of the extension. The stud anchor comprises an expandable anchor member having a shank portion and a head with the head comprising a plurality of resiliently deformable segments. The segments each include an outer surface which is biased into frictional contact with an associated inner wall surface of the extension securing the extension to the stud anchor.

Abstract: A mounting arrangement for attaching a toilet seat and cover to a toilet bowl is disclosed which facilitates installation without the use of conventional hand tools. The arrangement includes a base having a hinge post for hingedly connecting the seat and cover thereto. The base further includes a downwardly depending stem having a longitudinal bore which is adapted to be positioned within the mounting hole on the toilet bowl. A fastener assembly is provided which includes a bolt positioned within the longitudinal bore of the stem which may be readily rotated by hand. An expandable nut is threaded to the lower end of the bolt, with the entire mounting arrangement being insertable into the mounting hole of the bowl from the seat side thereof.

Abstract: There is disclosed a wall anchor structure having a hollow body in which spaced ribs extend from a flanged portion at one end to a sleeve in which an axially movable nut element is captured. A bolt extends through the body from the flanged end to threadedly engage the nut. With the bolt head abutting the flange, the structure is struck or otherwise inserted through a dry wall or wallboard to bring the flange flush against the inner surface of the wall. The bolt, being slidable, is grasped at the head and pulled out to separate the head from the flange an amount permitted by the axial travel of the nut. This permits the jaws of an anchor operating tool to be inserted between the head and flange, and forced apart to forcibly separate the head and flange further, causing the ribs to deform so as to bite into and interlock with the wall material. The bolt is then threaded out of the nut and removed to permit a bracket or other support member for shelving or the like to be seated against the flange.

Abstract: A fastener for panels, comprising a basal body provided with a flange portion having a circular perforation bored in the central portion thereof for permitting insertion therethrough of a screw and with a pair of legs extended downwardly from the lower surface of the flange portion so as to be opposed to each other across the line drawn perpendicularly through the center of the circular perforation, and a screw receiving body disposed between the opposed legs, provided in the upper portion thereof with a pair of receiving pieces protruding sideways out of the openings formed between the opposed legs and further provided with a screw receiving hole in the axial portion coinciding with the perpendicular line drawn through the center of the perforation. The screw receiving body is provided with engaging protuberances one each on the lateral surfaces thereof opposite the legs and the legs are provided with oblong guide holes adapted to receive the engaging protuberances.