Abstract: On the rear side of the front panel (1) of an electronic equipment, at each lateral end which overlaps an edge of an aperture (3) into which the electronic equipment is being inserted, bushings (5) having rearwardly extending catch members (6) are fastened to the rear of the front panel by screws (12). The bushings are of resilient synthetic plastic. The catch members are disposed around a continuation of the central bore of the bushing. Stepped bores (14) are provided in the wall portion overlapped by the front panel. When the bushings are inserted into these stepped bores the catch members are first deflected inwards and then, as they reach their final position, spring outwards and catch against the step (16) of the bore (14). Mating projections (9) and openings (10) lock each bushing against rotation as it is screwed on to the front panel (1).

Abstract: A sliding grommet includes a head flange and a shank portion of a unique construction which is capable of absorbing relative positions of an oblong fitting hole in a mounting panel and a throughhole in a mating hole to be attached caused by thermal expansion and contraction. A pair of Y-shaped members are disposed on opposite sides of the shank portion to permit flexing upon insertion, and locking tabs are provided on each leg of the Y-shaped members for retaining freely floating the shank portion in the oblong fitting hole in the mounting panel so as to permit lateral sliding engagement between the upper and lower edges of the fitting hole.

Abstract: The invention relates to an apparatus for detachably connecting two parts. It has a receiving part (1) which possesses a housing (3a). A lock (5a) which has a bevelled entrance (7a) is mounted in the housing (3a). A locking pin (9d) having a displacement part (12a) is used for locking or for latching with the lock (5a), which is kept pressed in the locking direction by a rubber ring (16). A spring or block acts against movement of the locking pin (arrow 57). An unlocking part (11a) is mounted on the shaft of the locking pin (9d) so that the said unlocking part can slide in the direction of movement (arrow 57). The locking pin (9d) carries a thrust plate (8) on its end facing away from the displacement part (12a). If pressure is exerted on this thrust plate, the displacement part (12a) initially interlocks with the lock (5a).

Abstract: A self-locking retainer, actuated by pushing a piece to be retained into the retainer, includes opposed molded parts hinged together, one pair of parts, on opposite sides of a hinged portion, movable together to form a base and a retention plug with integral locking dogs, and a second pair of parts mounted on the base of the first pair formed as hinged jaws with opposed recesses to clamp a piece to be retained. Detent means on the jaws and the base of the first pair of parts interlock to hold the jaws together when pushed together by a part to be retained.

Abstract: A universal material clip for use in multiple panel joining in end to end relationship. The clip comprises a unitary body member with multiple dependent legs extending from a central portion. The clip is positioned on a first panel to be joined and then the panel with clip attached is engaged to a second panel wedgeably securing the first and second panels together. The clip adjusts to independent panel thicknesses thus equalizing the finished surface of the two panels.

Abstract: The present invention relates to hold-downs for securing components to circuit assemblies and more particularly to fish hook hold-downs for securing connectors to printed circuit boards.

Abstract: A grommet has a female member and a male member. Each member consists of a sleeve with a flange formed at one end. The sleeve of the male member is slightly smaller than the bore of the sleeve of the female member. A locking mechanism for the grommet consists of an annular groove inscribed within the inner surface of the sleeve of the female member and a slightly-offset, matching annular lip formed upon the outer surface of the sleeve of the male member. The annular groove and annular lip are offset so that the two members remain in tension, pulling toward one another when the grommet is locked in place. The grommet is locked in place by inserting the male member into the female member and urging them together until the annular lip fits within the annular groove. The grommet may be disassembled by placing a dowel or like object against the non-flanged end of the male member and striking the male member or otherwise applying a force thereto.

Abstract: Eyelets are described that project through holes in the legs of a connector and through plated holes of a circuit board, to hold the connector to the board until they can be soldered together. When the eyelet is fully installed, a cap 56 (FIG. 3) at its top rests against a leg 30 of a plastic connector body, while a tubular portion of the eyelet projects through the leg 40 of a metal connector shell and into the plated hole 20 of the circuit board. The tubular portion of the eyelet has upwardly extending tines 66 that each has a contact part 78 (FIG. 8) lying a distance below the cap equal to the combined thickness T (FIG. 3) of the connector body and shell legs, so the contact part lies adjacent to the shell leg 40 to solder to it. The diameter of the shell hole 46 is smaller than the diameter of the circuit board hole.

Abstract: A peg for anchoring within a hole having an undercut portion comprises a body (1) with an external end (5) for mounting an element thereon and a tapered internal end (11) widening out towards the inside of the hole, a locking ring (2) formed from segments disposed about the body and intended to pivot within the undercut portion (10). The external diameter of the ring (2) is equal to that of the hole (8). Means (4,14,19) for temporarily immobilizing the segments of the ring are mounted upon the body. Means fixed upon the body may drive the ring (2) into the vicinity of the undercut portion of the hole and radially acting means (4) may cause the segments of the ring (2) to pivot into the undercut portion.

Abstract: A system for screening particulate material includes replaceable screening modules mounted to a rigid frame by lock pins. The lock pins are fixed into mounting holes in the frame and interlockingly and removably engage recesses in the sidewalls of the screening modules so that the lock pins remain fixed to the frame while allowing the modules to be removed and replaced as required due to wear or to change sieve size. A split lock pin is provided for removably connecting the module to the frame along an outboard edge of the frame while maximizing screening area. An improved elongate frame member is arranged to avoid abrasive wear of the frame.

Abstract: A holding element fastener formed of molded plastic for fastening within a support opening and having a base body and two resilient fingers for extending through the support opening. The fingers stand at an acute angle to each other, and when in the mounted condition grip behind the support opening. The base body and the resilient fingers define an approximately V-shape triangular inter-space and each of the resilient fingers is provided on its outer circumference with two inwardly extending open areas which reduce the total amount of plastic required and simplify the operation of molding the holding element fastener. The open areas are located on opposite sides of a laterally extending middle stay in the form of a relatively thin rib. The upper limit of each middle stay is defined by a separate transverse outwardly extending cross stay which joints to the upper end of the respective resilient finger and the associated middle stay.

Abstract: A fastening device is provided for securing of liners to the interior of pickup truck cargo beds. The fastening devices include a base plate which overlies the outer surface of a bed liner and a locking tongue projecting laterally from a bottom of the plate to extend through an aperture in the liner sidewall and to mechanically couple with a flange of the cargo bed sidewall to effect clamping of the liner to the flange. The locking tongue is formed with a peripheral edge surface that includes a locking surface angularly disposed with respect to the base plate forming in cooperation therewith for receiving edge portions of the liner and flange in clamped relationship, a camming surface that rides against an edge of the aperture in the liner during insertion to facilitate assembly and a locking surface that automatically engages the liner to maintain the fastening device in locking engagement.

Abstract: A device arranged to be releasably mounting within a hole in a panel, e.g., a ceiling, to hold a lamp bulb and associated reflector or any other member therein. The device comprises a tubular body, a flange for engaging one side of the panel, and plural, equidistantly, peripherally-spaced, flexible arms for engaging the other side of the panel. Each arm extends outward from the body and is moveable from an extended position to a retracted position and vice versa. The arms are moved from the extended position to the retracted position when the body is pushed into the hole while being twisted about its longitudinal central axis in one rotational direction. The arms automatically move back to the extended position when the device is in place to hold the device securely within the hole. The device can be removed by pulling it out of the hole while twisting it about its longitudinal axis in the same rotational direction as used to insert it, whereupon the arms flex to the retracted position.

Abstract: A wooden architectural moulding includes fasteners spaced from each other and each include a continuous mounting groove of re-entrant profile having inwardly facing internal ledges, and a unitary fastener provided with deformable limbs having profiled noses which are arranged to interact with the ledges to connect or disconnect the base member.

Abstract: A vehicle body pillar has a cavity therein through which air flow creating undesirable noise and in which moisture and fluids such as water are not to be collected. An expandable sealant plug is inserted therein and retained in place. The sealant material forming the plug is later expandable under controlled conditions. It is preferably expandable under temperatures of about 275.degree. F. to 400.degree. F. over a period of time. Preferably during the electro-coated paint baking and curing operation, the sealant is exposed to appropriate temperatures for sufficient time to expand the sealant about 800% and cure it, sealing the cavity so as to prevent the flow of air through it. The expanded sealant also effectively blocks the intrusion of fluids such as water, minimizing corrosion within the pillar.

Abstract: A two-way fastener which is adapted for joining at least two members in, electively, either a reusable position or a non-reusable position includes an elongate shank, a head member which is integral with an upper portion of the shank, an elongate rail member integral with and substantially parallel to the shank, the rail member having a substantially tee-shaped cross section, a plurality of non-reusable resilient teeth attached to a side of the shank which is opposite the rail member and a plurality of reusable teeth attached to second and third sides of the shank. The non-reusable teeth are angled toward the head member at a first angle, and the reusable teeth are angled toward the head member at a second angle which is less than the first angle. When inserted into a slotted member so that the two sets of reusable teeth engage the sides of the slot, the device acts as a reusable fastener.

Abstract: A press-in fastener clip (50) is provided that features a resilient locking arm (10) having a surface (18) adapted to releasably secure clip (50) to an aperture (16). Clip (50) has a V shaped insertion leg (8) that is operative to assist in securing clip (50) to aperture (16) as well as to automatically urge clip (50) outwardly therefrom upon manual release of locking arm (10).

Abstract: A mounting system for removably mounting the lower flange of a control rod guide tube over an opening in the upper core plate of a nuclear reactor includes support pins having first and second pin portions. The first pin portion passes through the guide tube flange and has an externally threaded section. The second pin portion is secured within the bore of the upper core plate and has a solid body section and a split-leaf section. The solid body section has an outer diameter which is accommodated in the bore by a close clearance fit. The split-leaf section has a split intermediate section and a split end section. The split intermediate section extends from the solid body section, has an outer diameter which is less than the outer diameter of the solid body section, and tapers uniformly between the solid body section and the split end section to form a conical shape. The split end section biasingly engages at least a portion of the bore wall.

Abstract: An anchoring device having a head and a shank integral with the head and adapted to be forcibly driven into a hole having a cylindrical wall defined within a body of concrete, masonry, or like material. The shank has a spring temper and has a proximal portion, a distal portion, and a transitional portion joined to the proximal portion at a proximal elbow and to the distal portion at a distal elbow. Each such portion is substantially straight when the shank is unstressed. The shank has a substantially uniform, substantially circular cross-section, except at the elbows, where the shank has smaller cross-sections causing the shank to be preferentially bendable at the elbows. Each of the proximal and distal portions has an axial length equal to at least approximately twice its diameter. The transitional portion has an axial length approximately equal to its diameter. The distal portion facilitates initial entry of the shank into the hole.

Abstract: A clip for attaching an ornamental member to a wall member such as a vehicle body panel. The clip has a head continuously connected with a portion locking the ornamental member. The head is pressed against one surface of the wall member. The clip also has a leg extending from the head and is inserted into a through hole in the wall member. Pawls are formed at a maximum diameter portion of the leg and pressed against the other surface of the wall member to fixedly hold the leg onto the wall member. Pliable thin-walled resin is coated through secondary forming around the respective outer peripheries of the pawls and the leg for preventing damage of an inner periphery of the through hole when the leg is inserted into the through hole.

Abstract: An adjustment mechanism for a friction drive unit. To adjust the contact pressure between the friction wheel and a cooperating wheel of the friction drive unit, one of these wheels is mounted on a lever that is pivotable about a pivot axis. A cam that applies the contact pressure rests against the lever. The spacing of the cam relative to the pivot axis of the lever is variable.

Abstract: An improved adhesive mounted nutplate assembly and related installation method are provided for secured mounting of a nutplate or the like onto a substrate, particularly at a blind side of the substrate in alignment with an access opening. The nutplate assembly includes a nut member having a resilient fixture pin received therein, with the nut member being adapted for adhesive mounting onto the blind side of the substrate with the fixture pin extending through the access opening. A pulling force applied to the fixture pin draws the nut member with a positive force against the substrate. The fixture pin is sized to bind within the access opening when released to maintain this positive force for the duration of an adhesive cure period, after which the fixture pin can be forcibly drawn through and removed from the nut member. A preferred nut member comprises a nutplate having a floating nut carried by a base which is adapted for adhesive mounting onto the substrate.

Abstract: A push button type fastener for releasably joining together two panels. A stud assembly is snap-fit to one panel, and a mating socket is snap fit to the other panel. The stud assembly and the socket are releasably secured to each other merely by pushing a stud of the stud assembly toward the socket, which includes two resilient arms that move apart to receive and lock onto a thin wall portion at the stud's remote end. The stud assembly is released from the socket by rotating the stud such that the thin wall portion spreads apart the two resilient arms of the socket, to allow a spring to urge the stud out of it engagement with the socket.

Abstract: A quarter-turn fastener for securing together a plurality of overlapped panels comprises an elongated body portion having a longitudinal axis, a head provided upon one end of the body portion for engaging a first outer surface of one of the overlapped panels, and a pair of resiliently flexible fingers provided upon an opposite end of the body portion for engaging a second outer surface of a second one of the overlapped panels whereby the panels are preliminarily secured together by the fastener in a non-compressed state. A pair of diametrically opposed inclined cam portions are also provided upon the body portion at a position axially between the opposite ends of the body portion so as to engage the second outer surface of the second one of the overlapped panels such that when the fastener is rotated through means of an angular rotation of 90.degree.

Abstract: A self-licking stud assembly including male and female segaments. The male segment includes a base for mounting or being integrally molded on a panel member to be joined with a second panel member in a side-by-side relationship, a central stem extending from teh base, with a plurality of equally spaced deflectable fingers formed on the end thereof so as to extend outwardly and toward the base. The female segment includes a base for mounting or being integrally molded on the second panel member, a flange or collar formed on one side of the base, and an opening through the base and the collar, with a frustoconically shaped surface formed on the inner surface of the collar. The outer edges of the fingers are selectively shaped to lockingly cooperate with the frustoconically shaped surface once the fingers are urged through the opening.

Abstract: According to the present invention, there is provided a plaque holding clip which is characterized by that it has a pair of elastic legs that constitute a trunk of the clip. Because the outer peripheries of the elastic legs are subjected to evenly applied external force and hence smooth changes of load when the clip is introduced into a fitting bore, it maintains its original plaque holding potential for a long time. Moreover, since the outer peripheries of the elastic legs are so designed that they suitably adapt themselves to the inner periphery of a fitting bore, they are free from any undesirable deformations and consequently any changes of the load applied thereto even if the clip is introduced into a fitting bore in an inclined condition. This feature contributes to the ease of handling the clip. A clip according to the invention may be provided with a central pillar to enhance its durability and the ease of handling without deteriorating the other features of the clip.

Abstract: A floating panel mount for an electrical connector is provided. The floating panel mount includes a central support post from which a pair of helically configured inwardly collapsible vanes extend. The vanes are tapered to define a minor cross sectional dimension less than the diameter of a mounting aperture in the panel and a major dimension which exceeds the diameter of the mounting aperture. The vanes are helically collapsed in response to ramping forces generated as the floating panel mount is urged into the mounting aperture of the panel. The vanes then resiliently return to their undeflected condition to engage the panel. In this mounted condition, the vanes permit radial float of the electrical connector relative to the panel, but prevent backup in response to mating forces.

Abstract: A fastening pin, or peg is partially inserted into an aligned aperture and attached thereto by a webbed flashing. In a one-step assembly operation, the pin is driven further into the aperture as the flashing is broken and driven through an aligned aperture of a second component.

Abstract: A fastener is provided for securing a first panel-like member to a second panel-like member by securing, in a state with a fastener temporarily secured to the first panel-like member, an elastic fastening portion of the fastener projecting from the first panel-like member toward the second panel-like member. It includes a first flanged portion having long and short sides, a second flanged portion having long and short sides, projecting from the center of the first flange and spaced apart from the first flange by means of a distance corresponding to the thickness of the first panel-like member, an elastic fastening portion projecting from the top of the second flange, and an elastic portion projecting from the second flange toward the first flange and engaged within a hole of the first panel-like member. The long side of the first flange is longer than the long side of the second flange. The short side of the first flange is longer than the short side of the second flange.

Abstract: The device disclosed by the invention is associated with an element to be mounted in a wall, by insertion in a hole bored in the wall.It comprises a longitudinal body (4), centring and lateral stabilizing means (7') and longitudinal locking means consisting of a collar (5') and peripheral resiliently retractable portions (10') having a step shaped cut-out (11') so as to form a succession of interrupted circular shoulders so that after insertion the edge of the reception hole in the wall is automatically engaged bweteen the collar (5') and the shoulder whose longitudinal spacing from the collar is the closest, upwardly, of the thickness of the wall.The device may be integrated in the element to be fixed or consist of a sleeve (1'). With the device, an element may be quickly fixed while working from only one side of the wall.

Abstract: A fastening element particularly adapted for use in conjunction with a mandrel for opening the expandable sleeve of the fastening element into secure relationship with a wall having a hole into which the fastening element is inserted. The sleeve is designed to provide a radial channel for enveloping the plate member adjacent the hole. The mandrel becomes a part of the fastener and offers good resistance to shear forces and also provides the means for removing the fastening element as well as fixing it to the object to be fastened.

Abstract: A snap-in type fastener for securing an object to an apertured support includes a shank member having predetermined diameter and length. A locking member integral with one end of the shank member is provided to extend through the support aperture to facilitate engaging of the apertured support by the shank whereby the locking member resists withdrawal of the fastener from the apertured support. A head member is disposed at the other end of the shank member and includes a resilient member which provides for axial deflection of the shank for a selected distance in the direction of the apertured support to facilitate engaging of apertured supports of different thicknesses. The resilient member may form all or a portion of the head member depending upon the method of securing or may be associated with the head member.

Abstract: An enclosed plastic screw grommet includes a head flange and a shank portion. The head flange is provided with four radially extending U-shaped slots so as to permit flexing upon insertion into a panel, thereby reducing the force needed. The shank portion includes two sets of opposed ramps formed on its outer surface and which are disposed in an offset relationship with respect to each other to thereby accommodate a variety of panel thicknesses.

Abstract: A device for attaching a plate or cap over an opening, comprising a rod or wire extending from the front through the plate or cap. On the end of the rod or wire extending into the opening, there is provided a spring clamp whose end remote from the rod or wire has a sharp point. The plate or cap has a closeable opening therein for introducing a foamable resin thereinto, which foamable resin forms a foam in the plate or cap and in the opening and, thus, seals the opening.

Abstract: A substrate support of integral construction, by which substrate (20, 39) can be fixed angularly to a plate (22, 40) and which comprising a base (3, 33), a fixing portion (1, 31) for coupling the base (3, 33), a first projection (7, 37) extending from the base (3, 33), and a second projection (8, 38) extending from a wall (9) extending from the base (3, 33). The substrate (20) is gripped by the base (3, 33), the first projection (7, 37) and the second projection (8, 38) so that the end of the substrate (20) can be inserted into the space between the first projection (7, 37) and the second projection (8, 38) and the substrate (20) can be fixed angularly to the plate (22, 40).

Abstract: A plug for the bearing of an autohoist arm on a motor-vehicle body comprises an elastic receiving part secured in a receiving orifice and a dimensionally stable spacer piece located in front of and clipped securely to the receiving part. A common passage bore is provided in the receiving part for receiving a retention peg which secures both the receiving parts and the spacer piece in the receiving orifice by nose-shaped forms at its ends. The position of the retention peg is fixed by a locking pin.

Abstract: In interconnecting construction between a bolt and a mounting plate such as a shell of a brake booster is disclosed. A sealing, annular projection is formed in an end face of a bolt head so as to surround a bolt shank which is formed with a serration. Both the annular projection and the serration are caused to bite into the opposite surfaces of the mounting plate, whereby an excellent sealing effect and locking action against rotation are simultaneously achieved.

Abstract: A guard protects the upper surface of a hanger support from scatching by hangers displaying clothing or other merchandise. The support guard has a bottom surface adapted to rest upon the upper surface of a hanger support and has one or more upwardly extending pegs. Downwardly extending posts or caps are attached to the support guard for friction fitting engagement with the hanger support below the bottom surface of the strip.

Abstract: A fastener and removal tool adapted for manually securing and thereafter detaching two separate members in a preselected spatial relationship is disclosed. The fastener includes an elongate shaft, an abutment plate mounted on a first shaft end, and a collapsible head mounted on an opposing shaft end. The removal tool includes a plurality of elongate shafts positioned to be driven along the exterior surface of the fastener to apply a compression force along that shaft, thereby effecting a collapse of the shaft end sufficient to permit the retraction of the fastener from its engagement with the connected members.

Abstract: A captive screw assembly for an edge lighted panel assembly of the type used in aircraft cockpits and the like. A screw carried in a resilient washer having a lip for retaining the screw and deflectable fingers for insertion into a panel opening for retaining the washer and screw in the panel. Typically the plate carries switches and other components and the panel is attached to the plate by the screws which engage threaded openings in the plate or in nuts carried by the plate.

Abstract: A fastener comprises a female member and a male member. The female member has a flange-like head having a pin insertion hole, a hollow cylindrical leg section extending from the head and having a plurality of legs defined by means of a plurality of slits extending from the free end toward the head, and elastic locking portions provided upon the outer periphery of the leg section. The male member has a pin-like portion passing through the pin insertion hole formed within the head of the female member, and a large diameter portion and first and second reduced diameter portions adapted to pass through the insertion hole and capable of engaging the free ends of the plurality of legs so as to achieve various different engagement modes.

Abstract: A two-way fastener which is adapted for joining at least two members in, electively, either a reusable position or a non-reusable position includes an elongate shank, a head member which is integral with an upper portion of the shank, an elongate rail member integral with and substantially parallel to the shank, the rail member having a substantially tee-shaped cross section, a plurality of non-reusable resilient teeth attached to a side of the shank which is opposite the rail member and a plurality of reusable teeth attached to second and third sides of the shank. The non-reusable teeth are angled toward the head member at a first angle, and the reusable teeth are angled toward the head member at a second angle which is less than the first angle. When inserted into a slotted member so that the two sets of reusable teeth engage the sides of the slot, the device acts as a reusable fastener.

Abstract: The connecting element (1) has a flat head (2) with an inside hexagon (3), a shaft (7, 8) and two studs (5, 6). The two studs (5, 6) are offset against one another through 90.degree.. The first stud (5) molded on the free shaft end is shorter than the second stud (6). The connecting element (1) is suited especially for connecting the side wall (37) of a supply body of a room divider with vertical, tubular columns (35) of the room divider. The connecting element is very rapidly mounted. In the installed state the second stud (6) holds the side wall (37) spaced from the column (35). For this reason the supply body is somewhat shorter than the clear distance between adjacent columns (35). The supply bodies, therefore, can be installed in and removed from the room divider very simply and rapidly subsequently.

Abstract: A single-fin fastener can be used in which an engaging fin has a flexible hinging butt at a tip of a support board projecting from a base member or the like and extends from the butt in a direction opposite that of the projection of the board. The fin includes an engaging notched portion and a stopper extending therefrom to a movable tip of the fin. An opening preventive portion is continuously attached to the base member or the like and faces the stopper across a gap.

Abstract: A fastener for entering holes in two adjacent bodies to hold them together and to be completely concealed therein including a flexible resilient tubular body having at least one locating tab centrally located thereon for determining the extent to which spaced portions of the tubular body on opposite sides of the locating tab may enter holes in the adjacent bodies, and resilient flexible locking tabs struck up from the spaced portions of the tubular body for retaining them within the adjacent bodies in which they are located.

Abstract: A clip for securing a first member to a second member includes a flange portion having an opening, an inserting portion, a pawl portion provided upon the inserting portion so as to be engageable with the flange portion and the second member, and a plurality of foldable coupling portions for connecting the inserting portion with the flange portion. The inserting portion is inserted through the first member in a first direction, then back downwardly into the opening of the flange portion and finally through the second member in a second direction, thereby securing the first member to the second member. When the inserting portion is inserted into the opening of the flange portion, the pawl portion engages the flange portion to retain the flange portion in engagement with the undersurface of the first member. When the inserting portion is further inserted through the second member, the pawl portion engages the second portion member so as to clamp the second member in cooperation with the flange portion.

Abstract: A screw retainer comprises a head portion, and a leg portion depending therefrom and provided with locking means, a screw retainer bore being formed so as to extend from the top of the head portion through the head and leg portions. An engagement portion projects from the upper surface of the head portion such that the screw retainer bore is open at the top of the engagement portion. The top of the engagement portion is provided with temporary engagment pawls for engaging an upper surface of a panel to be secured to a base panel within which the screw retainer is disposed by means of its dependent leg portion.

Abstract: A one piece fastener which uses spring action to fasten parts together. The fastener has a body which is inserted into a drilled aperture in the parts. An enlarged head on one end of the body is too large to enter the aperture. A spring on the other end of the body is normally too large to enter the aperture but can be retracted to a size to pass through the aperture. A stud has its head connected to the spring and its opposite end in threaded engagement with an internally threaded passage extending through the body of the fastener. Turning of the stud by a special tool applies a torsional force to the spring which retracts it so that the fastener can be applied to or removed from the fastened parts. Alternative embodiments of the invention employ various types of multiple stage springs to enhance the fastening power.

Abstract: A fastening system comprises a push in-screw out fastener having a slotted head, threaded cylindrical shank with a plurality of resilient thread segments thereon and a tubular receptacle. The diameter of the receptacle is less than the diameter of the thread segments and greater than the shank diameter such that the thread segments are deformed by insertion of the fastener into the receptacle. The receptacle has an internal thread formed at its entry. The internal thread engages the resilient thread segments to impart a removal force to the fastener when its slotted head is rotated in a counterclockwise direction.

Abstract: A method and apparatus for joining parts together in spaced relation especially in production assemblies which includes a plurality of carrier elements to be fastened to one part by conventional fastening elements. A plurality of receiver elements are fastened to a second part by being integrally molded to that part or bonded by sonic welding or adhesives or other appropriate fastening means. The carrier elements and the receiver elements are shaped to telescope together and interlock when so telescoped. The parts are prepared independently with similar orientation of the carrier and receiver elements. The final assembly is achieved when the parts are brought together and the elements interlocked in the telescoping relationship.