Abstract: A fixing means for attachment to a base (1), e.g. to a level concrete roof, of a thermal lagging (3), e.g. a mineral wool mat, said fixing means consisting of a screw (2) or other nail binding to the base and a washer (4) located on top of the lagging, this washer carrying a tubular recess (5) partly penetrating into the lagging (3) and the bottom (6) of which is pierced by the screw and within which the head of the screw (2) resides. To the end of the tubular recess (5) has been connected by stays (7) a plug (8) fitting into a hole drilled in the base (1) and into which the screw (2) can be screwed.

Abstract: A blind fastener, producing a large blind side bulb, and including a locking ring to hold the fastener in a secured position against stresses. A collapsible barrel segment is disposed on the blind side between the end of the body portion and the head of the pull stem to effect the expansion of the body portion on the blind side. The barrel resists collapsing under loads sufficient to expand and flare the body portion of the fastener to produce the desired large bulb but collapses upon satisfactory flaring having been accomplished. The collapsible barrel, being collapsible along an angle, makes the fastener particularly well-adapted for fastening non-parallel surfaces.

Abstract: A removable blind rivet comprising a tube (1) with a head (3 or 6) on one end to contact one workpiece (11) of two workpieces (10 and 11) to be rivetted together, the other end (14) being upsetable against the other workpiece (10) by a pull pin (5) with a head (4) pulled into the tube, or by blasting an explosive charge (8) inserted in the other end (14) of the tube. The head is a removable nut (3) threaded upon the accessible end of the tube (1), or a spring washer (6) inserted in a slot (7) in the accessible end of the tube.

Abstract: A lock spindle blind fastener to be set with a single action tool where the fastener includes a pin or mandrel, a sleeve and a locking collar; the sleeve has an enlarged head which has a straight counterbore for the initial reception and guiding of the locking collar with the counterbore communicating with a bore portion having an entrant resistance angle for reception of the collar during setting. The entrant resistance angle is selected to be of a magnitude to provide hold-off of the locking collar. The strength of the mandrel and other characteristics of fastener components are related to the force required to deform the locking collar along the entrant resistance angle such that a high strength blind fastener is provided which can be set by a single action tool.

Abstract: An expansion sleeve for attaching objects to a relatively thin panel comprises a hollow headed bolt threaded externally for its full length and threaded internally at an end portion remote from the head. The unthreaded internal portion of the bolt has an inwardly projecting apertured annular shoulder into which a drift pin may be driven to expand the sleeve on the interior side of a panel to which the sleeve is to be attached. A jamb nut pulls the expanded sleeve portion firmly against the inside of the panel member and thereafter a threaded rod is threaded into the interior threads of the sleeve so that a nut on the threaded rod may be tightened against the sleeve head. This draws the inner end of the sleeve toward the panel member to increase the pressure of the expanded sleeve portion against the panel. An object to be attached to the panel is then connected to the protruding end of the threaded rod.

Abstract: Disclosed is a blind rivet comprising a shank provided with a series of engaging teeth and a lower end having an increased diameter and a rivet body disposed around the shank and provided with a series of lock steps formed so as to correspond to the series of engaging teeth on the shank, a head portion to close one edge of the fitting hole of a panel subjected to rivetting and a lower end substantially joined to the lower end of the shank, whereby desired firm rivetting of the panel is accomplished by inserting the rivet body accommodating the shank into the hole of the panel and moving upwardly the shank for thereby causing the enclosing wall portion of the rivet body to be eventually bent inwardly and doubled up to expand radially the rivet body.

Abstract: An anchoring retainer is provided for mounting at one side of a supporting structure such as a wall or ceiling having a through or restrictive opening therein through which the retainer is first inserted to reach one side of the structure or for mounting in a blind hole in a concrete floor or wall. Generally the same retainer may be used with a through opening or blind hole. The retainer, adapted to be used with a threaded element, comprises a flexible unitary one-piece body made from a plastic material. The body has an axis, is of generally triangular configuration and has at the apex thereof a sleeve provided with an opening surrounding the axis through which the threaded element extends. The sleeve has a pair of integrally formed outwardly diverging elongated flexible legs.

Abstract: A blind fastener particularly suited for mechanically joining composite structures such as graphite and fiber/epoxy matrix with a minimum of blind side damage. A first sleeve of highly ductile material is disposed as a liner about the portion of the nut which passes through the composite materials. The first sleeve extends longer than the thickness of the materials. A second sleeve of measurably less ductility is disposed between the first sleeve and the head of the threaded corebolt. The two sleeves have abutting surfaces which are non-sliding whereby as the nut and corebolt are threadily engaged and the two sleeves are brought into compression, the less ductile sleeve flairs the more ductile sleeve about the nut to create a protected area about the blind side of the materials.

Abstract: The present connecting device for joining sheet metal components has a la of synthetic material at least in the area of the contact surfaces with neighboring components thus effectively preventing contact corrosion.

Abstract: A construction set of resiliently flexible pipe incorporating an integrally formed interlocking pipe joint. The set and joint are adaptable for use on a small scale as a toy and on a larger scale for construction of furniture, geodesic domes, and the like. Outwardly bowed longitudinal members integrally formed in the pipes are adapted to be inserted with the members of one pipe interlocked with the members of the other pipe. In alternate embodiments, a spherical member or hardenable material are inserted within the assembled joint.

Abstract: Disclosed is a straddling dowel, of plastic, having a continuous screw insertion hole and several expansion segments that are formed by longitudinal slits in the dowel body and which extend from the circular head portion to the circular foot portion of the dowel. In the latter part, a female thread can be cut by the inserted screw, thereby rendering axial expansion of the dowel body posible. The expansion segments are formed by overlapping annular plates or discs which, on spreading or axial expansion in the form of an increase in diameter or spreading move relative to each other over the whole extent of the contacting surfaces of adjacent plates or discs, which contacting surfaces run obliquely or conically to the axis of the dowel.

Abstract: A device for fixing members to panels, or joining panels, which has a body moulded from a resilient plastic, comprising a head part and a tail part joined by strip-like connectors which distort when the tail part is pulled towards the head part, and including outwardly deflected wings displaceable inwards to allow the fixing device to be applied.

Abstract: A blind rivet assembly is disclosed. The rivet assembly comprises a mandrel, a rivet body, a buckling sleeve and a locking collar. The sleeve, rivet body and collar are slideably disposed about the mandrel with said buckle sleeve disposed adjacent one end of the body and the mandrel extending through the body and beyond the other end of the body. The buckle sleeve has a generally cylindrical configuration such that when subjected to a pulling force, the sleeve buckles outwardly from the mandrel, slides about the rivet body and engages a work piece.

Abstract: This fastening device, notably for fixing an object to a hollow partition or wall, comprises a splined plug, a screw and a nut; the bottom of the gaps formed between the splines is provided with a slit, except at the plug ends, to enable the splines to separate and expand when contracted as a consequence of the tightening of the nut by means of the screw; the nut carries lugs corresponding to the gaps formed between the plug splines so that when the device is tightened home the lugs registering with the gaps engages the latter to assist in reinforcing the locking action exerted by the expanded and twisted splines against the inner face of the partition.

Abstract: A blind rivet comprising a shank and a rivet body enclosing the shank, the rivet body containing in the cylindrical wall thereof wedge means and windows possessing spaces for admitting the wedge means such that, when the blind rivet is inserted through holes perforated in advance in the panels to be joined therewith and, subsequently, the shank is slid up the interior of the rivet body, the cylindrical wall of the rivet body is bent outwardly in the radial direction and, at the same time, the wedge means are raised and forced into the spaces of the windows, causing the cylindrical wall of the rivet body to be brought into tight contact with the edges of the holes in the panels and consequently enabling the blind rivet to be secured to the panels.

Abstract: A self drilling, closed end, blind rivet has a hexagonally shaped flange, or other suitably shaped means of driving, at one end and a hardened drill bit at the other end, with the two being joined by an integral sleeve wall with a rolled groove in it that forms an internal chamber to retain the head of a mandrel. Withdrawal load on the mandrel, after the rivet has been inserted through a hole drilled by it in a plurality of layers to be joined, will upset the sleeve wall into a folded flange that coacts with the hex head, or other driving means, to tightly grip the outside face and the blind face of the layers being joined.

Abstract: An improved assembly for mounting a part onto a base member is provided by incorporating a tubular insert having a hollow inner core in a mounting hole in the part. A fastener, such as a bolt, machine screw or rivet, may then be inserted through the insert in the mounting hole for attachment to the base member. The tubular insert has an integral flange on the end which engages the fastener. The flange functions as the "washer" in conventional fastener assemblies. When the assembly is subjected to axial compression by the fastener, the insert collapses uniformly in an axial direction to absorb a substantial amount of the total compressive load exerted upon tightening the fastener.

Abstract: An improved assembly for mounting a part onto a base member is provided by incorporating a tubular insert having a hollow inner core in a mounting hole in the part. A fastener, such as a bolt, machine screw or rivet may then be inserted through the insert in the mounting hole for attachment to the base member. When the assembly is subjected to axial compression by the fastener, the insert collapses uniformly in an axial direction to absorb a substantial amount of the total compressive load exerted upon tightening the fastener.

Abstract: An expansion dowel for insertion through an opening in a structural member into a hollow space within the structural member, is formed of a shaft portion, a pair of expansion arms connected to the shaft portion and a pair of webs, each joined to one of the expansion arms and connected to one another. In the inserting position, the expansion arms and webs are folded inwardly and extend along the projection of the axis of the shaft portion. When the dowel is displaced into the expansion position, the expansion arms extend approximately perpendicularly to the axis of the shaft portion and each web is disposed at an acute angle to the expansion arm to which it is joined.

Abstract: A tacking rivet has a shaft and a head with a longitudinal bore through the haft and through the head. The head forms a rim extending radially outwardly and the rim or head has a divider which divides the head and/or rim into at least two portions. The divider may, for example, be a slot or recess or indentation.

Abstract: A dowel, arranged to secure an article to the surface of a receiving material having a hollow space within it into which the dowel extends, is formed of an axially elongated dowel body and a flange member at one end of the dowel body. The flange member includes a flange part extending transversely outwardly of the dowel body. The dowel body is formed from a strip of material and includes an end part extending transversely of the axial direction of the dowel body with a threaded opening through the end part, and a pair of axially extending legs divided into webs and extending in the axial direction of the dowel body from the end part. Inwardly directed recesses are formed in the ends of the legs spaced from the end part. The flange member includes a sleeve-shaped projection extending generally perpendicularly of the flange part.