An anchor assembly for use with hollow panels, comprises a holding member, such as a hook, and an anchor. The anchor is adapted to penetrate a hollow panel, such as a wall, and, once the anchor assembly has been installed to the wall, the anchor is firmly secured thereto while the hook, which is joined to the anchor, is located on a visible side of the wall. The anchor includes a first anchor portion and a second vice portion. The anchor portion, when the anchor assembly is installed to the wall, extends through the hole defined in the wall while the vice portion is located behind the wall. An elbow portion is provided on the anchor between the anchor and vice portions for allowing the anchor to be pivoted when being installed in the wall from a first position where the vice portion is inserted though the wall to form the hole therein and a second position where the vice portion extends behind the wall and in abutment therewith and the anchor portion is lodged in the hole.

A screw, especially for wood, has a knurled region (10) with two sets (11A, 11B) of ribs (11) that are offset from each other by an azimuth angle. For example, the two sets of ribs extend towards each other from opposite ends (10A, 10B) of the knurled region (10) and are intertwined only in an overlap region (12) that is at the middle of the knurled region.

Presently disclosed is a standoff fastener for use in a compound floor structure. The threaded fastener includes a threaded standoff portion designed to accept a nut which has a diameter larger than a head portion of the standoff fastener. The head portion is located centrally within the fastener in order to reduce a tendency of the fastener to pivot within a driver during the fastening process.

The present invention provides compliant screws compatible with standard threaded holes that are self-anchoring via auxetic properties. Once a screw has been twisted in place using a mating screw driver, the screw won't be able to be removed unless it is broken, its surrounding material is torn out with the screw, or unless the screw driver itself is again used to twist the screw in the opposite direction. Thus, although reusable, the screw will never come out of its hole in the presence of vibrations or other cyclic or random loading scenarios. The screws are thereby suitable for critical joint applications where screws must never come loose. Non-limiting examples include satellite fasteners, high-speed vehicle bolts, pedicle screws, and other screws used to secure medical implants within a human body.

A drilling bolt-and-nut assembly for attaching rigid panels, including a drilling bolt and a grooved nut. The drilling bolt includes a cylindrical screw-thread section, an external thread-diameter, and an internal thread-diameter; a drill-bit section; and a thread-less section interconnecting the screw-thread section, the drill-bit section. The grooved nut has a through cylindrical opening formed at the center of the nut, wherein the cylindrical wall of the cylindrical opening of the grooved nut is threaded with threads that are operatively compatible with the threads of the drilling bolt. The drill-bit section includes at least two cutting-blades, wherein the at least two cutting-blades are spaced apart. At least two grooves are formed in the wall of the through cylindrical opening, wherein the grooves are spaced apart similar to the peripheral distance between the cutting-blades of the drill bit-section.

A method of constructing a building comprising the steps of attaching a first panel to a second panel. The first panel is one of a single plenum panel and a multi-plenum panel and the second panel is one of a single plenum panel and a multi-plenum panel.

A screw with an asymmetrical thread for securing wooden members together is disclosed. The screw includes a shaft with a head at one end and a tip at the other end. A continuous asymmetrical thread extends along the shaft. The asymmetrical thread has a front surface facing the tip and a rear surface facing the head, the front and rear surfaces each having an angle relative to a plane normal to the shaft. The asymmetrical thread has a first section and a second section. The portion of asymmetrical thread in the first section has front and rear surfaces of first angles with respect to the plane normal to the shaft. The portion of asymmetrical thread in the second section has front and rear surfaces of second angles different than the first angles. The asymmetrical thread includes a transition portion between the first and second sections. The transition portion is positioned along the shaft such that the transition portion is located proximate the interface of the wooden members when the screw secures the wooden frame members together and the head of the screw engages the first of the wooden members.

A threaded fastener is provided. The threaded fastener includes a shank having a non-threaded portion and a threaded portion. A tip extends from the threaded portion and a head extends from the non-threaded portion. A plurality of wings extend from the shank and are configured to form a passage as the threaded fastener advances. An enlarged portion is configured to seat in the passage formed by the plurality of wings with the threaded fastener in an installed arrangement.

A swivel hanger system includes an anchor member with an anchor head disposed at an end of the anchor member and an elongated body, where at least a portion of the elongated body is configured to be inserted into a support member when the system is connected with the support member. The system also includes a swivel member with an open end extending to a hollow interior of the swivel member, where the open end is configured to rotatably couple with the anchor head such that the anchor head is located within the hollow interior and the elongated body extends through the swivel member open end. The system further includes a stop structure to limit an insertion distance at which the anchor member is inserted into the support member.

A fastening arrangement including a grommet, which is configured as a substantially cylindrical sleeve with a head part, with a hollow-cylindrical shaft and with a conical tip, and also a fastener and a nut, for example made of plastic, which is fitted on the first threaded portion of the fastener. The fastener has two threaded portions, wherein one threaded portion is configured as a right-hand thread and the other threaded portion is configured as a left-hand thread (or vice versa). Moreover, the invention comprises a mounting method for such a fastening arrangement, in which the setting operation (anchoring of the fastener, adjustment of the sheath) can be managed in one step without changing the driving direction of the setting tool.