Abstract: An exemplary pre-assembled fastener device may include a bushing attached to a bolt fastener before the fastener device is used to attach two or more components to one another. The bolt fastener may have an external thread, and the bushing may have an internal thread that is configured to fasten to the external thread. The internal thread may have a profile including a flat crest configured to be spaced apart from the bolt fastener.

Abstract: A fastener with a freely translatable collet body, which at least partially translates within an auxiliary structure, and further comprise a captive threaded screw for rotationally engaging with the collet body to transform rotational movement into translational movement through substantial arresting of collet body rotation by way of an anti-rotation means. The screw comprises a free-spin feature that functionally, but not physically, decouples a drive tool from the collet body.

Abstract: A heat dissipation device includes a base and a fastener. The fastener includes a clasping portion, an elastic member placed and a first gasket. The clasping portion includes a fixing part, an operating part, and a connecting part connected to the fixing part and the operating part. The connecting part defines a slip groove. The first gasket interferingly fits the slip groove of the clasping portion. The elastic member is placed around the connecting part of the clasping portion and is arranged between the operation part and the first gasket. The first gasket abuts the base after the fixing part extending through the base.

Abstract: A captive securing means for a screw has a shaft for holding the screw and a retaining means arranged in the shaft, the retaining means resting, in the inserted state of the screw, at a tangential point on the outer circumferential surface of the screw, the retaining means arranged on the inner circumferential surface of the shaft, and the retaining means extending from the inner circumferential surface of the shaft into the free region of the shaft such that at the tangential point, the angle between the direction of extent of the retaining means and the outer circumferential surface of the screw is <90 degrees. Consequently, the screw is axially moveable in the shaft without the quality of the captive securing means being impaired, and the screw is captively secured in the shaft by the retaining means resting on the outer circumferential surface of the screw.

Abstract: There is provided a unitary, strike drop-in anchor where the individual parts are permanently held together to avoid misplacing any such individual part. The anchor comprises an anchor body with a central bore, the first end of the bore being threaded and having a constant internal cross-section for the length of the threaded portion. The exterior of the anchor body, and the central bore, having a decreasing bore towards the second end of the anchor body beyond the threaded portion, a threaded bolt with an internal central bore and a preferably polygonal drive head, and external threads extending from the drive head to the second end, has a strike tool extending through the central bore from the second end and extending beyond the drive head.

Abstract: A retention clip for hardware may include a support surface having an aperture extending through the support surface. The support surface may surround an entire perimeter of the aperture. The clip may further include at least one anti-rotation surface extending from the support surface in a non-parallel direction, and a plurality of angled tabs extending from the support surface in non-parallel directions towards the aperture. At least a portion of each angled tab may be disposed directly below the aperture. The tabs may be elastic below a preset load placed on the tabs, and the tabs may deform and lose their elasticity above the preset load.

Abstract: A heat dissipation device includes a base and a fastener. The fastener includes a neck portion, a head portion formed at one end of the neck portion, and an engaging portion formed at another opposite end of the neck portion. The base defines a receiving portion through the base. The receiving portion includes an inserting hole and a mounting hole communicating with the inserting hole. The engaging portion extends through the inserting hole from a top of the base to make the neck portion enter the inserting hole. The neck portion is then crushed into the mounting hole from the inserting hole. The engaging portion abuts the bottom side of the base at a periphery of the mounting hole. The head portion abuts the top side of the base at the periphery of the mounting hole.

Abstract: A ring bolt and a subassembly thereof; the ring bolt having a shank, a first fastening thread extending from a distal end of the shank and a helical ring extending from the fastening thread. The major diameter defined by the helical ring is greater than the major diameter defined by the fastening thread. A component to be captured together with the ring bolt in a subassembly has at least one inward projection in an opening therethrough to define a restricted entrance wider then the major diameter of the fastening thread but smaller than the major diameter of the helical ring.

Abstract: A screw fall preventing structure prevents a screw from falling out of a unit that is attachable to and removable from a main body of an apparatus. The screw is used for fastening the unit to the main body of the apparatus. The screw fall preventing structure includes: a wire piece having a bent portion fitted around the screw to hold the screw axially rotatably; and a fixing member fixing the wire piece to the unit. When the unit is not fastening by the screw, the screw is elastically supported via the wire piece on the fixing member and the elasticity is given by a portion of the wire between a portion fixed by the fixing member and the bent portion.

Abstract: A fixed or adjustable chain guide includes a captured shoulder bolt fastener. An adjustable chain guide such as a chain tensioner arm assembly includes a tensioner arm with a pivot bore defined about a pivot axis. The pivot bore includes an inner end opening through a rear face of the tensioner arm and an outer end opening through a front face of the tensioner arm. The tensioner arm further includes at least one resilient fastener retaining tab located adjacent the pivot bore. The shoulder bolt extends through the pivot bore and is engaged by the at least one resilient fastener retaining tab, and the at least one fastener retaining tab inhibits separation of the fastener from the tensioner arm. The fastener preferably includes an annular groove or other recess to be engaged by the one or more fastener retaining tabs in order to permit the tensioner arm to rotate relative to the fastener.

Abstract: A wall mounting assembly includes a threaded bolt having a longitudinally extending bore, an anchor bar, a cord, and a bushing configured to plug the hole in the wall. The bolt and anchor bar, attached by the cord, can be introduced through a hole in the wall and, by retrieving the cord, the threaded bolt can be caused to insert through a bolt hole in the anchor bar, and through the bushing aperture plugging the hole in the wall, thereby drawing the anchor bar flush against an interior surface of the wall. A fixture back plate positioned between an exterior surface of the wall and an end of the bolt, can be secured against the exterior surface of the wall by tightening a nut onto the threaded bolt, thereby also securing the anchor bar flush against the interior surface of the wall.

Abstract: A captive screw for securing together two panels has a screw and a spring extending between the screw head and a ferrule. A collar is formed on the screw shank under the ferrule to limit penetration of the screw threads in a bottom panel so that the upper panel floats on the spring.

Abstract: A penetrating fastener has a fastener head and fastener tip spaced apart by a longitudinally oriented fastener shaft. A tetherable washer has a substantially planar base surface having a fastener aperture extending therethrough. A longitudinally oriented wall extends longitudinally upward from at least a portion of the base surface to form a concave fastener cavity configured to receive at least a portion of the fastener head. Two tether apertures extend laterally through the wall and are laterally spaced apart along the wall. Both of the tether apertures are laterally arranged along the wall in a rotationally asymmetric configuration. A first one of the tether apertures is located a second longitudinal distance from the base surface and a second one of the tether apertures is located a third longitudinal distance from the base surface. The tether apertures are configured to simultaneously accept a tether extending through both of the tether apertures.

Abstract: A screw assembly element in a first part is provided for use when attaching the first part to a second part using a screw. The assembly element comprises a sleeve arranged in a hole in the first part, the sleeve being cylindrical. At least a portion of the first part extends into the inside of the sleeve.

Abstract: A machine includes a threaded fastener connected to, and positioned adjacent, a maintenance feature. A removable cover blocks access to the maintenance feature and includes a captive fastener assembly. The captive fastener assembly includes a barrel with an internal passage separating a tool opening from a fastener opening, and the internal passage is divided into a cage volume and a fastener passage by an internal thrust surface. A retention component that defines a tool passage through a capture surface is mechanically mounted in the barrel adjacent a tool opening. A captured fastener is trapped to move between the capture surface and the internal thrust surface in the cage volume. The captured fastener includes an internal tool engagement surface oriented toward the tool opening and threads oriented toward the fastener opening.

Abstract: A fastener retainer is provided capable of retaining a fastener to a part prior to and during assembly. A first portion engages a fastener flange while leaving a fastener head exposed for assembly tool access. A second portion has flanges that engage the edges of the part.

Abstract: A screw structure for securing a first object to a second object comprises a screw member, a blocking member and a pivot member. The screw member comprises a pole. The blocking member comprises a base portion secured to the pole, and two positioning portions are located on the base portion. The pivot member comprises two latching portions, and each of the two latching portions is engaged between the screw member and each of the two positioning portions. The pivot member is capable of rotation relative to the screw member and the blocking member.

Abstract: A screw structure for securing a first object to a second object comprises a screw member, a blocking member and a pivot member. The screw member comprises a cap and a pole extending from the cap. The blocking member is captive on the pole and defines a latching groove. The pivot member comprises a latching portion elastically engaged in the latching groove and located beneath the cap. The pivot member can be raised up and lowered down, and twisted to activate the screw function.

Abstract: A screw assembly includes a screw member, a rotating member, and an installation member. The screw member includes a cap portion and a body connected to the cap portion. The installation member defines an installation slot and includes an elastically deformable latching portion. The rotating member includes a mounting portion. The installation member is secured to the body, the mounting portion is received in the installation slot, and the elastically deformable latching portion engages the mounting portion between the cap portion and the latching portion, to prevent the rotating member from rotating relative to the screw member and the installation member.

Abstract: A fastener for attaching a milling cutter body to an adaptor includes a head portion, a body portion and an undercut disposed between the head portion and the body portion. The head portion has a diameter greater than a diameter of the undercut and a thread root diameter. The diameter of the undercut is equal to or less than the thread root diameter to allow the fastener to freely rotate when the fastener is threaded completely through the milling cutter body. Once threaded completely threaded the milling cutter body, the fastener is threaded into the adaptor to securely attached the milling cutter body to the adaptor.

Abstract: Disclosed is a method and apparatus for positioning and assembly of two or more parts wherein at least one of which is of a creep sensitive material. The method and apparatus enable very precise positioning of parts during assembly by holding a rough alignment with free play permitting finer alignment. Creep resistant annular inserts are molded into the part and provided with flow apertures to conduct plastic material into the annular insert bore. A spindle defined the geometry of a centering hole within the bore during molding. The annular inserts are operable as compression limiters to prevent deformation of the creep sensitive material under the action of heat or tightening stresses.

Abstract: A fastener and a fastener system using the fastener are disclosed. The fastener has an elongated shank having a thread formed at one end and a annular recess formed adjacent the threaded portion to define a leading and trailing abutment surface. The thread guides the fastener into engagement with one or more components having thread engagement features and the annular recess permits the free spinning of the fastener without further tightening after the thread engagement features have advanced past the thread. The fastening system includes the fastener and a component to be fastened having a passageway for accepting the fastener formed by at least two flanges engageable in the thread and engageable in the annular recess of the fastener.

Abstract: A retainer for a drop-in anchor includes a durable, moisture resistant member insertable into a sleeve of a drop-in anchor and configured to be retained in the sleeve by one or more threads disposed in the sleeve to prevent inadvertent removal of a plug from the sleeve. A drop-in anchor assembly includes a tubular sleeve having a first end including one or more internal threads, and an expandable second end. A plug is insertable in the sleeve such that when the plug is driven into an installed position in the sleeve the second end expands. A retainer formed of a durable moisture-resistant material is insertable in the sleeve behind the plug, and is configured to be retained in the sleeve by the one or more threads and prevent inadvertent removal of the plug from the sleeve.

Abstract: An exemplary fastener used for connecting at least two components together includes a bolt, a shell, and an elastic member. The bolt has a head, a shaft, an engaging portion, and a threaded portion in series. A diameter of the engaging portion is larger than a diameter of the shaft and a diameter of the threaded portion. The shell has a side wall and a collar extending inwardly from a bottom of the side wall. The collar defines a through hole therein. A diameter of the through hole is slightly smaller than the diameter of the engaging portion of the bolt. The elastic member is sandwiched between the head of the bolt and the collar of the shell. The bolt with the elastic member is received in the shell, and a top of the engaging portion of the bolt abuts against a bottom of the collar of the shell.

Abstract: An exemplary heat dissipation device includes a fan having fixing cylinders, a heat sink having a supporting board, and fasteners fixing the fan to the heat sink. Each fastener includes a screwing pole, a first elastic member and a second elastic member encircling the screwing pole, and a fastening cylinder engaging with the screwing pole. Each screwing pole includes a head, a shaft extending coaxially downwardly from the head, and a post extending coaxially downwardly from the shaft. For each fastener, the screwing pole extends through a corresponding fixing cylinder of the fan, the first elastic member is compressed between the head and the corresponding fixing cylinder, the second elastic member is compressed between the corresponding fixing cylinder and the fastening cylinder, and the post protrudes from the fastening cylinder and is engaged with the supporting board.

Abstract: A wall fastener includes a nut having a major planar structure having a hole for receiving a screw, the major planar structure having a first end with two staggered knife edges on opposite sides of the major planar structure and a second end; and a string, wherein the string is detachably connected to the major planar structure.

Abstract: An assembly for mounting electronic components includes a face plate comprising a thermoplastic material. The face plate includes a retaining element for securing a captive screw and spring assembly for mounting an electronic printed circuit board. The retaining element includes one or more slots adapted to expand the element to permit insertion of the screw and deformation of the hole upon insertion of the screw, while locking the screw to retain the screw in place. This arrangement permits the elimination of the metal standoff frequently used in similar devices. Methods for preparing the assembly and mounting the printed circuit boards are also described.

Abstract: A valve unit (120) is provided according to the invention. The valve unit (120) includes a valve body (121), two or more fasteners (128) adapted for affixing the valve body (121) to a base, and two or more fastener grooves (125) formed in two or more sides of the valve body (121). The two or more corresponding fasteners (128) rest in the two or more fastener grooves (125). The valve unit (120) further includes a fastener link (100) extending between the two or more fasteners (128) and holding the two or more fasteners (128) substantially in the two or more grooves (125).

Abstract: An exemplary securing structure includes a base, a fastener, and a spring mounted around the fastener. The base defines a securing hole, and two slots located aside the securing hole and communicating with the securing hole. The fastener includes a head, a bolt extending downwardly from the head, and two blocks extending outwardly from an outer periphery of the bolt corresponding to the slots. The bolt is extendable through the securing hole together with the blocks extending through the slots, respectively. The fastener is then rotatable to a position such that the blocks abuts a bottom side of the base. The spring is resiliently compressed between the head of the fastener and a top side of the base.

Abstract: A fixed or adjustable chain guide includes a captured shoulder bolt fastener. An adjustable chain guide such as a chain tensioner arm assembly includes a tensioner arm with a pivot bore defined about a pivot axis. The pivot bore includes an inner end opening through a rear face of the tensioner arm and an outer end opening through a front face of the tensioner arm. The tensioner arm further includes at least one resilient fastener retaining tab located adjacent the pivot bore. The shoulder bolt extends through the pivot bore and is engaged by the at least one resilient fastener retaining tab, and the at least one fastener retaining tab inhibits separation of the fastener from the tensioner arm. The fastener preferably includes an annular groove or other recess to be engaged by the one or more fastener retaining tabs in order to permit the tensioner arm to rotate relative to the fastener.

Abstract: A drywall extension sleeve for an electrical box includes a rectangular sleeve with upper and lower flanges. The extension box preferably has an outer dimension that mates with a drywall ring or box. The sleeve is preferably attached to a pre-wired assembly, which includes an electric cable and electrical box, drywall ring and the electrical component wired to the cable. The extension sleeve is positioned between the drywall ring or box and the electrical component. The electrical assembly is installed and drywall is then attached to the framed-in wall. An opening is provided through the drywall for the electrical component. The electrical component is then loosened and the extension sleeve and electrical component moved outwardly. Retention clips are placed in upper and lower flanges of the extension sleeve and the electrical component is tightened, drawing the extension and the component flush against the outer surface of the drywall.

Abstract: A key cylinder installation structure includes a key cylinder including a flange that is fixed to a trunk of a vehicle, the flange including a mounting hole through which a mounting bolt is inserted into a reference hole and a secondary reference hole, respectively, formed in the trunk, the key cylinder being operable to lock and unlock the trunk, and a pad that is attached to the flange of the key cylinder and includes a hole through which the mounting bolt is inserted and a projection projecting toward a center of the key cylinder in the hole of the pad. When the mounting bolt is inserted into the mounting hole, the projection of the pad lies between the mounting bolt and the mounting hole.

Abstract: An anti-theft fastening device for fastening an SBW motor externally mounted to a transmission case that includes a bolt having a head portion and a threaded portion integrally formed with the head portion, a bottomed tubular bolt cover having an opening end, and a cap member closing the opening end of the bolt cover. The bolt cover has a through bore to allow the threaded portion of the bolt to pass through, a bottom portion abutting a bottom surface of the head portion of the bolt, and a grip portion projecting from an outer circumference of the bottom portion and surrounding a periphery of the head portion of the bolt. When the threaded portion of the bolt is screwed into a threaded groove of the transmission case, the bottom portion of the bolt cover is interposed between the bottom surface of the head portion and each fastening portion of a bracket portion.

Abstract: The invention relates to a connecting element for the mechanical connection of at least two components, in particular two components of a motor vehicle door, with a bearing collar for bearing against a first component, with a crossbar that has bearing flanks for bearing against a second component and for clamping the latter against the first component in a rotated final assembly position, and with a shaft section, which bears the crossbar, for rotatably passing through corresponding openings in the components. In this case, a means is provided for fastening to the first component in a defined preassembly position. Furthermore, the invention relates to a corresponding connecting arrangement comprising at least two components each having an aperture, and a connecting element of this type, with the connecting element being held on the first component in a preassembly position.

Abstract: Captive panel fasteners are configured to be held captive on a panel by multiple retaining elements. The fasteners include longitudinal grooves along a cylindrical portion of the fastener, a retaining ring over the cylindrical portion, a primary structure for retaining the retaining ring on the cylindrical portion, and secondary structure for retaining the cylindrical portion within a bore of the panel. The retaining ring includes radially inwardly extending opposing prongs that fit into the longitudinally extending grooves. A stop point may be provided in the longitudinally extending grooves, or an end of the fastener may be flared, to retain the retaining ring on the fastener. The prongs may also be slightly flexible and flared to grip the longitudinally extending grooves. The secondary structure can include one or more spring loaded pins in the fastener extending externally outward.

Abstract: A fastening clamp for connecting a carrier part (13) and an add-on part (14) has a plug-through leg (1), with a plug-through sleeve (5), and a threaded leg (2), which is connected to a thread unit (10). The plug-through sleeve (5) extends away from the threaded leg (2) and has an effective overall height which is greater than the thickness of an add-on part (14). Engagement elements (11) are present on that side of the thread leg (2) which is directed towards the plug-through leg (1). In a pre-assembly arrangement, the legs (1, 2) are spaced apart by a distance which is large enough to allow a carrier part (13) to be positioned between the legs (1, 2) such that it is essentially free of engagement with the engagement elements (11), in which case, once a screw has been screwed into an end position, the engagement elements (11) thus engage with the carrier part (13) such that the fastening clamp is connected in a non-displaceable manner to the carrier part (13).

Abstract: An arrangement for securing at least one screw of an electric terminal includes a deformable insulating housing element, and at least one shaft having a shaft wall extending vertically in the housing element. The shaft wall includes profiling in an area thereof. The shaft is configured to receive a screw having a screw-head so that the screw is countersunk. The profiling is elastically deformable and configured to deform during insertion of the screw and to elastically return towards an interior of the shaft so as to secure the screw. At least one of the shaft and the screw has a non-circular shape.

Abstract: A captive screw includes a screw member and a tubular elastic member. The screw member includes a threaded post and a screw head positioned at an end of the threaded post. The tubular elastic member is sleeved on the threaded post and is tightly fitted with the threaded post. The tubular elastic member further includes a fold formed on the outer surface and spirally extending from one end of the tubular elastic member to the other.

Abstract: A captive panel fastener is manufactured by first overmolding a plastic cap around the head of a screw, the cap having a cylindrical plastic skirt extending downwardly beyond the base of the screw head and formed with a circular opening at the bottom. After a compression spring is placed around the shank of the screw, the screw is pressed against a top surface of a ferrule to a point where the capped-skirt extends downwardly below a ferrule flange. At that point, heat and pressure are applied radially inwardly around the periphery of the plastic skirt along its bottom edge until it is permanently deformed to a point where the bottom of the skirt is smaller in diameter than the ferrule flange. The screw is thereby captivated to the ferrule between extended and retracted positions.

Abstract: Methods and systems for an integrated captive fastener system is provided. A system includes an integrated nut assembly configured to be tethered to a first structure, the nut assembly including at least one of a lock washer and a flat washer coupled to a nut using a retainer, and a bolt configured to be tethered to at least one of the first structure and a second structure, the nut assembly configured to be threadably couplable to the bolt.

Abstract: Herein is disclosed a fastening assembly that may be used for securing first and second workpieces to each other in such manner as to provide vibration isolation between the first and second workpieces. The fastening assembly comprises an elongated, rigid fastener, and an elastomeric bushing, that are integrally secured together.

Abstract: A sprocket cover arrangement for a hand-held chain saw has a housing and a sprocket cover that has an opening and is connected to the housing. At least one stud bolt having a first end secured to the housing and having a second end that is a free threaded end is provided. The free threaded end projects through the opening of the sprocket cover to an exterior side of the sprocket cover when the sprocket cover is positioned in an operating position on the housing. A nut is screwed onto the free threaded end of the at least one stud bolt on the exterior side of the sprocket cover so as to secure the sprocket cover on the housing. The nut is secured captively, rotatably and with play in the opening of the sprocket cover.

Abstract: One embodiment of this fastening apparatus comprises a body with a passage through its length, a threaded member, a locking member, and a bowed ring. The threaded member is retained by the locking member in the passage. The bowed ring is disposed on the body and is configured to be flexible. This body may be fabricated of graphite in one instance.

Abstract: A securing device includes a securing member defining a securing hole therein, and a fastener extending through the securing hole. The fastener includes a spring, and a bolt having a main portion, a bottom fixing portion, and a top head portion. The securing hole includes a large portion, a small portion, and a concave around the small portion. A diameter of the small portion is greater than the main portion and smaller than the fixing portion. A diameter of the large portion is greater than the fixing portion and smaller than the spring. The main portion extends through the small portion with the fixing portion tightly abutting the securing member. The spring is mounted around the main portion and received in the concave. The spring is compressed between the head portion and a step of the securing member in the concave.

Abstract: A screw structure with a stop ring includes a screw, a ferrule, and a stop ring. The stop ring is fitted on a threaded shank of the screw to push against a front end of the ferrule, so that the ferrule is pressed against a head of the screw. With the ferrule being firmly pressed against the head of the screw by the stop ring, the ferrule will not sway relative to the screw, allowing the screw structure to be stably sucked with a sucking tool and be highly accurately assembled to a printed circuit board.

Abstract: A metal plate member fixation device installation method includes the step of preparing a barrel, the step of bonding the barrel to one of two metal plate members to be affixed by a reflow soldering process, the step of providing a screw member and a cap and coupling the screw member and the cap tightly together, the step of preparing a spring member and sleeving the spring member onto the shank of the screw member and then inserting the screw member and the spring member into the barrel at the metal plate member, the step of axially slidably coupling the cap to the barrel to let the spring member be stopped between a step in the barrel and a part of the shoulder of the screw member, and the step of releasing the pressure from the cap to finish the installation.

Abstract: One embodiment of this fastening apparatus comprises a cap with a passage through the length of the cap. This cap is received by the upper panels of a body. The embodiments of this fastening apparatus may have two or more upper panels that form a recess. The body also has a lower region with a passage. The upper panels are flexible and can translate to retain the cap within the recess. A threaded member is disposed in the passage of the body. This cap may be fabricated of graphite in one instance.

Abstract: A method of assembling a turbine casing is provided. The method includes inserting a bolt assembly through a first opening defined generally vertically through a first flange extending from a first casing member, such that a portion of the bolt assembly extends a distance upward from an upper surface of the first casing flange and such that the bolt assembly is retained within the first opening. The method further includes positioning a second casing member including a second flange including a second opening defined therein against the first casing member such that a portion of the bolt assembly extends through the opening defined in the second casing flange.

Abstract: A captured screw assembly is disclosed for locating a fixture plate relative to a base plate. The assembly includes a screw with a head having a diameter larger than the threaded body to form a shoulder. A bushing is frictionally engaged in an opening in the fixture plate and includes a central opening extending through the bushing and the fixture plate. The screw extends through the central opening of the bushing and threadedly engages a threaded hole in the base plate to accurately position the fixture plate relative to the base plate. The shoulder of the screw and a shoulder in the central opening of the bushing abut when the screw is fully engaged in the threaded hole. The screw and bushing include a capture feature formed therebetween to retain the screw within the bushing when the screw is disengaged from the threaded hole.

Abstract: A fastener element (16) has a head section (18), a threaded shank section (17) with threads (20) at a pitch and a distal end section (22). A retention device (24) is secured to the distal end section and is engageable with a fastener receiving member (14).