Screwing into wood with any sized screw can result in the wood becoming split. The wood can be pre-drilled to reduce the risk of splitting; however, if the pre-drilled hole is too small the wood is still relatively likely to split, whereas if the hole is too big the retaining force of the screw may be reduced significantly. The present invention provides an attachment apparatus for enabling a bolt to be secured to substrate that is susceptible to fracturing, the apparatus comprising: a plate 41 with a plurality of openings 42 therethrough, wherein each opening 42 is configured to receive a fixing member, and wherein the plate 41 includes a plate orifice 43 therethrough; and a receiving member 44 fixedly secured to the plate 41, the receiving member 44 having a cavity with an aperture 45 at one end that at least partially overlaps the plate orifice 43, wherein the receiving member 44 is configured to receive and retain a corresponding bolt such that the corresponding bolt is also disposed within the aperture 45, cavity and the plate orifice 43. In this way, the risk of fracturing a substrate susceptible to fracturing is reduced when securing a bolt thereto.

A method for joining a fastener to a workpiece that comprises the steps of: (a) providing a workpiece, (b) providing a one-piece metal fastener including an anchor section which extends along an anchor axis, a flange formed on and extending radially to the anchor section, the flange being radially delimited by an outer edge, and the flange at least partially forms an application section located at a non-zero distance from the outer edge; (c) applying a UV-curing adhesive on the application section; (d) arranging the fastener on the workpiece by pushing the flange against the workpiece and squeezing the adhesive toward the outer edges; (e) curing the adhesive exposed at the outer edge of the flange by applying an UV radiation; and (f) curing the adhesive between the flange and workpiece by anaerobic curing.

A fastener for attaching a first part and a second part includes a body comprising a first body portion, a second body portion, a flange arranged between the first body portion and the second body portion and extending radially outwardly from the body. A bore extends in an axial direction through the body and including an inner surface with threads. A plurality of splines extend radially outwardly from the second body portion and is configured to prevent rotation when the second body portion is inserted into an opening in the first part. An opening to the bore at the second body portion defines a concentric edge and an inclined plane extending from the concentric edge.

A component has a base bushing, which has a first axial end and an opposite second axial end and a first inner diameter, wherein the base bushing is equipped with a first internal thread with a first thread direction, and has a fastening bushing, which has a third axial end and an opposite fourth axial end and a second inner diameter. The fastening bushing is equipped with a second internal thread with a second thread direction which is opposite to the first thread direction, wherein the second inner diameter is smaller than the first inner diameter and the base bushing and the fastening bushing are separate elements and are arranged coaxially with respect to one another in the component. Alternatively, the base bushing and the fastening bushing are formed as a single piece.

An assembly for securing a workpiece. The workpiece includes a bore having a first opening in a first surface of the workpiece. A limiter extends between a proximal end and distal end and defines a bore and is received in at least a portion of the bore of the workpiece. A fastener extends along an axis between a proximal end and a distal end. The fastener has a head at the proximal end and a plurality of threads at the distal end. The fastener is received in the bore of the workpiece so that the distal end of the fastener having the plurality of threads is opposite the first opening of the bore. A first spring element is disposed about the fastener and is between the head of the fastener and the first surface of the workpiece. The first spring element is configured to generate a deflection force when the first spring element is subjected to a compression force during a tensioning of the assembly.

A clinching sleeve fastener is shown and described. The clinching sleeve fastener includes a first fastener part and a second fastener part. The first fastener part includes a head located at a first end and a shank located at a second end. The head is tapered such that it narrows the further away from the center of the first fastener part. An undercut is located between the first and second end of the first fastener part. The first fastener part further includes knurls located between the head and the undercut. A threaded opening extending through the first fastener part from the first end to the second end. The opening includes a step where the opening is wider on one side of the step. The second fastener part is a collar having a cross section which matches that of the first part. The collar has an opening extending therethrough.

Systems for positioning and bonding a nutplate to a substrate having an aperture include a nutplate engagement fixture and a temperature sensor retention fixture. The nutplate engagement fixture includes a rigid tube and an elastomeric tube engaged with the rigid tube, the elastomeric tube having an elongated tube sized to provide a friction fit with the aperture and retain the elastomeric tube within the aperture. The rigid tube is operable to engage the nutplate at one end and the elastomeric tube is configured to anchor the nutplate engagement fixture at the aperture and secure the nutplate in contact with the substrate. The temperature sensor retention fixture includes a fixture body sized and configured to engage with the nutplate and at least one passageway within the fixture body sized and configured to allow a temperature sensor to be inserted or embedded therein with an end proximal a surface of the nutplate.

Disclosed is a system for connecting an edge of one panel to an edge of a second panel. Recesses are formed into the edges of each panel, and two distinct inserts are pressed into and held within the recesses. The inserts include holes for receiving epoxy, and epoxy conducting shafts and circuits are formed on the outside of the inserts to assist in the encapsulation of the insert within each panel edge.

A fastener for retaining a bolt in a hole in a structure, comprising a bushing integrally formed with and extending from the bottom surface of a retainer, the bushing being dimensioned for insertion into the hole in the structure and having a wall thickness ranging from about 0.005 inches to about 0.030 inches, wherein the bushing is configured to be expanded within the hole, thereby securely coupling the expanded bushing within the hole of the structure and anchoring the retainer to the surface of the structure surrounding the hole. A tool for installing a fastener, comprising a tapered mandrel configured for insertion within a fastener situated within a hole of the structure, a drive mechanism configured to retract the mandrel through the fastener and thereby expand the fastener, and a force sensor configured for measuring a force applied by the drive mechanism to retract the mandrel through the fastener.

A fastening insert made of plastic with a T-shaped configuration consisting of an insert disc and a hollow cylindrical shaft fastened to the insert disc. The insert disc has a plurality of passage openings arranged off-center, at least one of which has an edge projection extending circumferentially continuously or circumferentially in sections, which is formed as toothing and extends on one side or both sides beyond the respective fastening side of the insert disc. This toothing ensures an additional form-fit connection or fixation of the fastening insert in a preferably fiber-reinforced composite material.