Abstract: The invention relates to a screw (10) including a head (12), a shaft (14), and a thread (16), with the thread (16) having at least two different thread sections (18, 20), with an external diameter DGn of a thread section (18) near the head being smaller than an external diameter DGf of a thread section (20) distant from the head and greater than an external diameter DSf of the shaft (14) in the area of the thread section (20) distant from the head. According to the invention it is provided that the thread (16) extends up to the bottom of the head (12). The invention further relates to a fastening arrangement (24), the use thereof, and a method.

Abstract: The bolt of the present invention can reliably peel coating even when fastened with a low torque, and can secure sufficient conductivity. A coating peeling part for peeling coating is formed at a tip end of an axis part in which a regular screw part is formed. The coating peeling part includes crushing parts having a trapezoidal top part and having a flank which is projected at a different angle with respect to the flank of the regular screw part; and a protruding part which is arranged adjacent to the crushing parts and whose top part projects beyond the outer diameter of the regular screw part.

Abstract: A self-tapping including a normal thread (10) and a female screw molding thread (12) having a larger diameter than that of the normal thread (10), out of pitches of the normal thread (10) positioned in a head portion side from the female screw molding thread (12), any one pitch is set to be larger than other pitches. The self-tapping not only reduces driving torques but also improves fastening force, and thus can be applied to various workpieces made of the soft material as well as a hard material.

Abstract: A gas turbine duct casing, in particular for an aircraft engine, is disclosed. The duct casing has a first wall segment and a second wall segment which is connected to the first wall segment by a clamp arrangement. The clamp arrangement has at least one clamp and one bolt which passes through a hole in the clamp and is screwed to a nut on a side of the clamp facing away from the wall segments. The nut braces at least one first leg of the clamp against the first wall segment, in particular by an intermediate element, and braces at least one second leg of the clamp against the second wall segment. The bolt has a head which is guided in a form-fitting manner in a groove on the outside of the first wall segment facing away from the gas duct.

Abstract: A rotary cutting tool includes a cutter of generally cylindrical shape disposed about a central longitudinal axis. The cutter has a first end having an active fluted portion and an opposite second end, the second end having a male threaded portion disposed thereabout. The cutting tool further includes a shank of generally cylindrical shape disposed about the central longitudinal axis, the shank having a recessed female threaded portion formed in a first end. The male threaded portion includes a number of threads disposed at a first pitch and the female threaded portion includes a number of threads disposed at a second pitch different than the first pitch. The cutter and the shank are selectively coupled via threaded engagement of the male threaded portion and the female threaded portion.

Abstract: An anti-false threading fastener system comprising: a female fastener member comprising: at least one female fastening thread formed in an interior of the female fastener member; at least one female lead thread formed in the interior of the female fastener member; a male fastener member comprising: a shank that has a lead end for insertion into the interior of the female fastener member; at least one male fastening thread formed on the exterior of the shank as a plurality of thread windings adapted to mate with the female fastening thread; at least one male lead thread formed on the exterior of the shank at the lead end that is at least a half winding around the shank and comprises a curved profile defined by an arc having a radius approximately equal to a radius of an arc that is tangent to both flanks of a thread profile of the at least one male fastening thread and below the pitch line of the at least one male fastening thread.

Abstract: A male anti-false thread fastener member having features, including: a shank that has a lead end and a tool engagement end; a head formed at the tool engagement end of the shank; at least one male fastening thread formed on the exterior of the shank as a plurality of thread windings adapted to mate with a corresponding female fastening thread formed in an interior of a female fastener member; at least one male lead thread formed on the exterior of the shank at the lead end that is at least a half winding around the shank and comprises curved profile defined by an arc having a radius approximately equal to a radius of an arc that is tangent to both flanks of a thread profile of the at least one male fastening thread and below the pitch line of the at least one male fastener thread.

Abstract: A method for correcting translational misalignment between male and female fastener members to prevent false threading, the method comprising: inserting a lead end of a male fastener member into a female fastener member, wherein the female fastener member comprises: at least one female fastening thread formed in an interior of the female fastener member, at least one female lead thread formed in the interior of the female fastener member, the at least one female lead thread having a groove in the crest, and wherein the male fastener member comprises: a shank that has a lead end for insertion into the interior of the female fastener member; at least one male fastening thread formed on the exterior of the shank as a plurality of thread windings adapted to mate with the at least one female fastening thread; at least one male lead thread formed on the exterior of the shank at the lead end that is at least a half winding around the shank and comprises a curved profile defined by an arc having a radius approximatel

Abstract: An adjust screw is inserted into a receiving hole of a sleeve to adjust and maintain a set load of the spring in a state where a male-threaded portion of the adjust screw is engaged with a female-threaded portion of the sleeve. One or more wall sections of the sleeve is plastically deformed in a radially inward direction and is pressed against a predetermined portion of an outer peripheral surface of the adjust screw, which is other than the male-threaded portion, to limit rotation of the adjust screw.

Abstract: The present disclosure relates, according to some embodiments, to orthopedic implantable device technology, and more specifically to variable angle implantable devices, systems, and methods.

Abstract: Devices, methods and systems for stabilizing at least a portion of the spinal column are provided. Devices include anchors and coupling members for engaging an elongate member. Systems include an elongate member sized to span a distance between at least two vertebral bodies and being at least partially formed of a flexible material. A number of anchors and coupling members are used to secure the elongate member to each of the vertebral bodies. The anchors can be compressed towards one another and the elongate member secured thereto and/or the elongate member can be tensioned to provide corrective forces to the spine.

Abstract: A locking screw apparatus is provided. In exemplary embodiments, the locking screw apparatus may comprise, a stem; a head attached to the stem; a threaded portion adjacent the stem, the threaded portion having a set of screw threads disposed thereon; and a locking means comprising a protrusion adapted to resist counter-rotation of the locking screw apparatus once in place within a material, the protrusion comprising at least one of counter-angled threads and one or more locking teeth.

Abstract: A fastener for fastening a heat sink to a printed circuit board via a back plate comprises a head and a shaft extending from the head. The shaft comprises a first and second engaging portions and a connecting portion therebetween. The first and second engaging portions have outer threads on exteriors thereof. Two cutouts are defined in the connecting portion. The back plate defines four thread holes machined with inner threads for engaging with the outer threads. In use of the fastener, an elastic force is produced to the fastener due to a deformation of the two cutouts during the threading. The elastic force helps the outer threads to have a secure engagement with the inner threads whereby the fastener can firmly engage with the back plate even when the fastener is subject to vibration or shock.

Abstract: A swage-type fastener to secure a plurality of workpieces together, which includes a pin member, having an elongated pin shank to be located in aligned openings in the workpieces. An enlarged head at one end of the pin engages one side of the workpieces. A grooved pin portion extends past an opposite side of the workpieces. A collar includes a shank portion adapted to be swaged into the pin lock grooves in response to a relative axial swage load applied by an installation tool. The collar is as-headed and does not require thermal processing yet provides an optimum balance of reduced collar shank wall thickness and increased hardness, whereby the swage load is minimized. A low swage load thread form for the lock grooves of the pin member is also provided, a reduced diameter, and a relatively short pull portion pin extension.

Abstract: A low swage load fastening system is provided for installing swage-type fasteners to secure a plurality of workpieces together. The fastener includes a pin member, having an elongated pin shank to be located in aligned openings in the workpieces. An enlarged head at one end of the pin engages one side of the workpieces. A grooved pin portion extends past an opposite side of the workpieces. A collar includes a shank portion adapted to be swaged into the pin lock grooves in response to a relative axial swage load applied by an installation tool. As one aspect of the system, the collar is as-headed and does not require thermal processing yet provides an optimum balance of reduced collar shank wall thickness and increased hardness, whereby the swage load is minimized. A low swage load thread form for the lock grooves of the pin is also provided, a reduced diameter, relatively short pull portion pin extension, installation tool improvements, and an associated method of use are also disclosed.

Abstract: A memory system for a computational circuit having a pipeline includes at least one functional unit and an address generator that generates a memory address. A coherent cache memory is responsive to the address generator and is addressed by the memory address. The cache memory is capable of generating a cache memory output. A non-coherent directory-less associative memory is responsive to the address generator and is addressable by the memory address. The associative memory receives input data from the cache memory. The associative memory is capable of generating an associative memory output that is delivered to the functional unit. A comparison circuit compares the associative memory output to the cache memory output and asserts a miscompare signal when the associative memory output is not equal to the cache memory output.

Abstract: An apparatus (10) includes a retainer ring configured to overlie an edge portion (52) of an inflatable vehicle occupant protection device (14) adjacent to an opening (53) defined by the edge portion (52). A mounting stud projects from the retainer ring. In a one embodiment, the mounting stud (64) has a central axis (71) and a free end (72) spaced from the retainer ring (54) along the axis (71). The peripheral size and shape of the mounting stud (64) are uniform fully between the retainer ring (54) and the free end (72). The mounting stud (64) further has an axially extending bore (85) configured to receive a screw-threaded fastener (66). In an additional embodiment, the mounting stud (124) is receivable through an aperture (76) in a reaction structure (28). The mounting stud (124) and a key (140) are configured to snap together into an interlocked condition in which the key (140) blocks withdrawal of the mounting stud (124) from the aperture (76) in the reaction structure (28).

Abstract: The joining element comprising a fastener or screw shank having a head has adjacent to said head a portion with a plurality of parallel, concentric fit-stretch rings, whose external diameter is 0.1 to 0.5 mm larger than the external diameter of the fastening thread. A fit slot is formed between in each case two rings, with a notch groove radius which is two to three times the top radius of the fastening thread. In the transition region between the head and the aforementioned portion is provided a fillet with a rounded portion having a diameter corresponding roughly to the pitch diameter of the rings and with a radius of curvature amounting to approximately to 0.1 to 0.15 times the external diameter. The rings have a stressing cross-section in the notch groove corresponding to the stressing cross-section of the fastening thread. The top width of the rings approximately corresponds to the side width of the preliminary shape of the rings.

Abstract: An improved thread convolution cooperates with a mating thread convolution to prevent reverse rotation between the thread convolutions in a direction tending to loosen a fastener. In order to prevent reverse rotation between the two thread convolutions while enabling them to be rotated in a forward direction to tighten the fastener, the improved thread convolution has a resiliently deflectable spring portion which forms part of a flank of the thread convolution. During relative rotation between the two thread convolutions in a direction tending to tighten the fastener, the spring portion is deflected from an extended position to a retracted position under the influence of a flank of the mating thread convolution. This enables relative rotation to occur between the two thread convolutions without gouging or excessive scratching of the flank of either of the two thread convolutions.