Abstract: A latching system used for a rotary closure of a shoe.

Abstract: A tool retainer is provided. The tool has a retainer sleeve having a longitudinal external tab to engage with an internal recessed radial groove with a tool holder, and wherein the retainer sleeve has two internal radial tabs that engage with a recessed groove in a rotating tool shank. A cutting tool assembly including a cutting bit and the retainer sleeve is provided.

Abstract: A bushing assembly for tubular structures is disclosed. The bushing assembly includes a body having a substantially flat configuration and defining a planar surface and an outer edge; and a plurality of projections extending from the outer edge and traverse to the planar surface, each projection defining a longitudinal axis, each projection including at least one ridge extending at least partially along a surface of the projection and along the longitudinal axis.

Abstract: A duct bank is assembled and placed into a trench. A method for securing the duct bank uses hold-down bars extending horizontally atop the duct bank and securing rods embedded in the trench. A one-way retainer, such as a push nut, is placed into a counterbore of a hand installation tool. The hand installation tool is then used to place the push nut a fixed distance onto one end of a securing rod. After removing the hand tool from the rod, the rod is then placed through an orifice of the push down bar and is extended through the duct bank. The rod is then embedded into the trench until the hold-down bar deforms slightly. This procedure is then followed for each orifice of the hold-down bar and for each hold-down bar used to secure the duct bank. The trench may then be backfilled with concrete or flowable fill.

Abstract: The invention relates to an assembly system including a member made of at least a first material including a staff and a shoulder, the staff of the member being received in an aperture of a part made of a second material having little or no plastic domain. According to the invention, the assembly system includes a locking element made of a third material arranged to elastically attach the part between the shoulder of said member and the locking element and in that the locking element is a washer whose internal wall radially grips the staff of said member and whose peripheral portion exerts an elastic radial force vertical to the shoulder of said member in order to secure the assembly of the member-part-locking element.

Abstract: One aspect of the invention involves a honeycomb panel insert for use with a honeycomb panel. The insert comprises a generally cylindrical body having a cylindrical outer peripheral surface, a first end, an opposite second end and a longitudinally extending passage having a first opening in the first end and a second opening in the second end. The first opening has a first perimeter and the second opening has a second perimeter that is relatively smaller than the first perimeter. The longitudinally extending passage has a first section having a first diameter, a second section having a second diameter that is relative smaller than the first diameter and a third section having a third diameter that is relatively smaller than the second diameter. The difference between the first and second diameters provides a first ledge and the difference between the second and third diameters provides a second ledge.

Abstract: A preload disk spring assembly structure for applying a preload to a bearing includes a first and a second main body correspondingly connected to each other face to face. The first main body is provided with at least one first retainer, at least one first notch, and at least one first protruded portion. Similarly, the second main body is provided with at least one second retainer, at least one second notch, and at least one second protruded portion. When the first and the second main body are aligned with each other such that the first retainer is tightly engaged with the second notch, the first notch is tightly engaged with the second retainer and the first protruded portion correspondingly contacts with the second protruded portion, the first and the second main body are brought to assemble together and form an integral body.

Abstract: A retention clip assembly is for attachment to a stud. The assembly includes a base plate and a cover plate. The base plate includes a base rim and a locking finger extending from the base rim. The cover plate includes a cover rim and a flange. The cover rim defines a lock opening configured for receiving the locking finger therein to retain the cover plate to the base plate. The flange extends inwardly from the cover rim at an angle which is acute such that the flange overlays the cover opening and is configured for engaging the external teeth on the stud. The cover plate attached to the base plate with a sheet of material therebetween. The cover plate and base plate are positioned such that the flange engages the external teeth of the stud to prevent removal of the retention clip assembly from the stud.

Abstract: A fastener assembly for installation within a work piece, the fastener assembly including a bolt, a retainer ring, and a housing that houses the retainer ring. The housing is positioned at and engages one side of the work piece, while the bolt is inserted into a hole of the work piece on an opposite side thereof. The retainer ring engages the bolt such that a plurality of pressure pads extending from a plurality of corresponding spring beam elements of the retainer ring reside in an annular groove of the bolt. The housing captivates the bolt onto the work piece, while providing a positive hold out of the bolt.

Abstract: A retainer ring including an outer ring having an exterior surface, an interior surface, and a plurality of spring beam elements extending inwardly from the interior surface, and a central aperture. Each of the spring beam elements includes an elongated arm having a first end attached to the interior surface of the outer ring and a second, free end opposite the first end. Each of free ends of the arms includes a tab portion and a pressure pad that extends from the tab portion. The retainer ring captivates pin members, such as bolts, onto work pieces, such that the pressure pads engage and align with an annular groove of the bolt. When the bolt engages the retainer ring, each of the spring beam elements is displaced and expands radially from a free position to an expanded position in order to enable the bolt to travel through the aperture. The retainer ring captivates the bolt onto the work piece, while providing a positive hold out of the bolt.

Abstract: A fastener including a bolt and a grommet assembly attached to the bolt for fastening to a work piece. The grommet assembly includes an upper grommet, a lower grommet attached to the upper grommet, a retainer ring, and a housing that houses the retainer ring within the lower grommet. The upper grommet is inserted into a hole at one side of the work piece and the lower grommet is attached to the upper grommet through the hole at an opposite side of the work piece. The retainer ring is inserted into the lower grommet and encapsulated by the housing. The bolt is inserted into the grommet assembly, and the retainer ring engages the bolt such that a plurality of pressure pads extending from a plurality of corresponding spring beam elements of the retainer ring reside in an annular groove of the bolt. The grommet assembly captivates the bolt onto the work piece, while providing a positive hold out of the bolt.

Abstract: A securing mechanism for a shackle having a pair of opposed legs with an opening at one end of each of the pair of opposed legs to form a pair of opposed openings. The securing mechanism includes a shackle bolt having a head at one end and a circumferential groove near an opposed end wherein the shackle bolt is received through the pair of opposed openings in the shackle. A two piece hinged clamp assembly is received in the circumferential groove in order to retain the shackle bolt in the shackle. A retainer pin is received in an opening in the two piece clamp assembly to hold the two piece clamp assembly in a closed position. A retainer clip surrounds the retainer pin. A lock pin through the two piece clamp assembly retains the retainer pin in the two piece clamp.

Abstract: A fastener (11) in the form of a strip (12) of material in the form of a ring which in plan view is profiled to conform to an annular gap (H) between a first component (A) bounded by the fastener (11) and a second component (B) bounding the fastener (11); the ring member having ends providing a gap (G) in plan view; the strip of material having a first side (14) and a second side (15); and having a series of integral fingers (16-23) spaced along the length of the ring and projecting, in plan view, outwardly from the ring whether from the first side (14), the second side (15), or both sides thereof. In a further version the ring includes a further series of discrete projections formed integrally from the strip and lying around the ring member in between members of the series of fingers.

Abstract: A fastening device includes a fastening member that fixedly fastens fastened members, and a driving member that is capable of releasing a fastening state of the fastening member by applying a driving force to a moving portion provided in the fastening member to drive it, wherein the driving member is formed of a shape memory alloy, and the driving force is a restoring force of the shape memory alloy to its memory shape.

Abstract: A joint includes at least one joint bushing and a joint bolt or pipe that is rotatably mounted with radial play in the joint bushing, forming an annular bearing gap. The joint has a play compensation element having several spring-loaded sections that engage in the annular bearing gap. The radii of the spring-loaded sections are shorter than the radius of the annular bearing gap. The spring-loaded sections project beyond a base body of the play compensation element at an acute angle to the joint axis. If the play compensation element is designed both to compensate the play and to axially secure the joint, it includes at least one clamping section, which is/are supported on the joint bolt and project(s) beyond the opposite side of the base body of the play compensation element to the spring-loaded sections. The play compensation element can be used in particular for joints of adjusting devices in motor vehicles.

Abstract: A tolerance ring for applications requiring high axial static friction has contacting portions having a novel profile. The use of multiple contacting portions having a smaller size that are wedge-shaped increases rigidity and provides a directional grip that increases axial static function. Using multiple wedge-shaped contacting portions with appropriate opposite slants provides a balanced and symmetrical grip. Using inter-level wedge-shaped contacting portions with opposite slants provides a more aggressive grip while providing a tolerance ring that is more dynamically stable and has a high resonant frequency.

Abstract: The present invention is directed toward a suspension system for mounting an exhaust duct liner within an exhaust duct of a gas turbine engine. An exhaust liner suspension system comprises a hanger, a bracket and a coil pin. The hanger comprises a first end for connecting with an exhaust duct and a second end having a hinge pin socket. The bracket comprises a base for connecting with an exhaust duct liner and a pedestal having a hinge pin bore. The coil pin is insertable in the hinge pin socket and the hinge pin bore thereby pivotably connecting the hanger and the bracket. The coil pin also provides a dampened connection between the hanger and the bracket.

Abstract: A closed locking ring for a shaft, a shaft stub or a bore having a locking groove therein. The locking ring can include a closed edge zone and a circumferentially interrupted engagement zone, wherein the circumferentially interrupted engagement zone is proximal to the locking groove and the closed edge zone is distal from the locking groove. The interrupted engagement zone slants towards the axis of the locking ring a sufficient amount to allow axial movement of the locking ring into the position of the locking groove.

Abstract: A push-on retainer (16, 116) is provided for securing together an initiator (14) and another element of a gas generating system. The retainer (16, 116) includes a first portion (16a, 116a) for engaging a surface of the other element of the system, and a second portion (16b, 116b) coupled to the first portion for engaging a surface of the initiator (14) to secure the initiator to the other element of the gas generating system. A vehicle occupant protection system (180) is also provided which includes a gas generating system utilizing a push-on retainer (16, 116) for securing the initiator (14) to the other element of the gas generating system.

Abstract: A retaining ring for use with a fastener is disclosed. The retaining ring comprises a plurality of substantially t-shaped internal tabs that oppose one another and are about twice as thick as the exterior of the ring. The ring is installed onto a fastener having at least two longitudinally-oriented slots by locating a tab into one of the slots and snapping another tab into another slot, thereby momentarily elongating during installation. The tabs substantially reduce the possibility of accidental removal of the retaining ring. In addition, resistance and damage to the internal tabs of the retaining ring is substantially reduced when the retaining ring slides axially in the longitudinal slots of the fastener. Since only the longitudinally-oriented slots are required for installation, the axially-oriented entry slots and cross-over slots of some fastener embodiments can be eliminated, thereby significantly reducing fastener cost and manufacturing time.

Abstract: An mat system with each mat having sloping lips which overlap with an adjacent mat's sloping lips and are secured by interlocking joints in the mats' lips and/or by captive locking pins to form an easily assembled and interconnected flat surface. In use, opposing ledges forms a slot within holes in the top overlapping lips to receive a captive locking pin. The pin is captive by mid body prongs which fix underneath the ledges in a mat's upper lip's holes, and the pin locks and unlocks with rotary turning of the pin resulting in the pin's keeper feet fixing underneath the similar ledges in the holes of the lower lip of an adjacent mat.

Abstract: A mechanical stop is adapted to be mounted onto a rigid bar and includes a single piece conically shaped body having a plurality of inwardly extending projections. Each of the inwardly extending projections have a distal end that is contoured to match an outer surface of the bar. The distal ends define an opening. The conically shaped body is adapted to be plastically deformed to a substantially flat shape after being placed onto the rigid bar. The opening includes a first dimension larger than the rigid bar prior to being plastically deformed and a second dimension smaller than the rigid bar after being plastically deformed. After the conically shaped body is plastically deformed into a substantially flat shape, the distal ends will frictionally engage the outer surface of the rigid bar to secure the mechanical stop thereon.

Abstract: A fastener assembly including a base consisting of a pair of motherboard snaps on a first end and a hollow shaft on a second end, the motherboard snaps to be inserted through an aperture of a motherboard. The hollow shaft is inserted through an aperture of a heat sink clip. The base further includes a pair of grooves on an exterior of the shaft. The assembly further including a cap consisting of a hollow interior, an integrated post attached to a base of the interior, and a pair of cantilever snaps. The cap is fitted over the exterior surface of the hollow shaft of the base to secure the clip between the base and the cap. The integrated post of the cap to be inserted into the hollow shaft of the base to deflect the motherboard snaps outward on an opposite side of the motherboard aperture to secure the assembly with the motherboard. The cantilever snaps to be positioned in the grooves of the shaft of the base to secure the cap with the base.

Abstract: A compressible structure for temporarily protecting a glass pane of a window structure includes a shaping member for removable securement on the window structure and defining a cavity over the glass pane and a layer of solidified compressible material in said cavity providing protection for the glass pane. A window protection system includes a shaping member and a supply system for supplying a compressible material in fluidic form to a cavity of the shaping member, wherein the fluidic compressible material sets to form a layer of solidified compressible material. A protected window structure includes a window structure and a panel of solidified compressible foam material disposed over at least a portion of one or more glass panes of the window structure.

Abstract: The structural unit (12) is comprised of a securing element (11) and a wiper device (10) and the wiper device 10 is detachably fastened to the securing element (11). In this instance, the detachable connection is embodied as a detent connection. A detent element (14) is embodied on the securing element (11) and elastically engages in detent fashion in a detent seat (13) embodied on a wiper bearing (15) of the wiper device (10).

Abstract: A fastener assembly having an elongated shaft with an exterior surface defining a plurality of open-ended longitudinaily-extending splines on one end of the shaft and a second plurality of longitudinally-oriented closed-ended spline circumferentially spaced from the first splines. The assembly includes a substantially triangular retaining ring having an inwardly directed tab is positioned in the middle of each side of the ring. Cross-over slots interconnect the first and second splines and are sized to require the retaining ring tabs to flex to permit transition of the ring tabs between the first splines and the second splines.

Abstract: A stud retainer comprising a generally disk shaped body having a periphery, an aperture therethrough and a wing portion extending from said periphery is disclosed and claimed. The disk shaped body includes a crown and the crown is concentric with the aperture. The wing portion extends laterally and transversely from an arcuate portion of the periphery of the disk shaped body. The aperture has an inner diametrical surface and an outer diametrical surface. The inner and outer diametrical surfaces of the aperture are smooth. A delivery track for guiding the stud retainers is disclosed and claimed. The process for making the stud retainer is also disclosed and claimed.

Abstract: For fastening a flow rectifier and a grid in an air flow rate meter, until now two elements have been used, one for the sake of cushioning and the other for the sake of securing. The novel fastening element combines both functions in one element. The fastening element is embodied in undulating fashion and can be deformed in its radial dimension.

Abstract: A wall anchor for reinforcing and/or securing walls, comprising an elongated anchor section, which is constructed to pass through an opening of one or more bricks and at which at least one abutment is provided, which can be pushed into the opening or over which a brick can be pushed and which is braced in the opening against movement of the wall anchor or of the brick in the opposite direction.

Abstract: A bearing load washer that permits assembly of electric motors with the rotor shaft in a vertical position and extending downward is described. The bearing load washer includes a plurality of portions that form a non-planar, wave shaped, substantially circular shaped, washer body. The washer includes a center opening that is sized so that an electric motor rotor shaft can extend through the washer body. The washer includes an outer circumferential surface and at least one raised area extending radially from the outer circumferential surface. The raised areas are configured to increase the outside diameter of the washer so that the outer circumferential surface engages the inner surface of an endshield bearing pocket at each raised area of the outer circumferential surface.

Abstract: A self tightening planar member and at least one retention member attached to the planar member. The planar member includes an inner perimeter, an outer perimeter, and defines a central axis. The least one retention member including a planar leg portion and a planar hook portion. The leg portion extends from the inner perimeter in a first direction along the central axis. The hook portion projects from the leg portion toward the central axis in a second direction, which is opposite the first direction along the central axis. The hook portion is acute to the central axis and has a free end located on an imaginary perimeter concentric to the inner perimeter of the planar member. The central axis and a plane passing through the hook portion of the at least one retention member form an angle in the range of approximately 20°-30°.

Abstract: The fastener includes a stud with a post element, a cylindrical inner sleeve with inwardly extending half-hemispherical bosses immediately adjacent to outwardly extending half-hemispherical bosses, and a base element with a blind aperture. The inner sleeve is received within the blind aperture and the post element is received within the inner sleeve. The pressure exerted upon the insertion of the post element of the stud and the structure of the bosses cause the inner sleeve to cock into a locked position. The exposed edges of the inwardly extending half-hemispherical bosses of the inner sleeve engage the post element while the exposed edges of the outwardly extending half-hemispherical bosses of the inner sleeve engage the walls of the blind aperture in order to resist the subsequent withdrawal of the post element from the blind aperture.

Abstract: A securing ring, includes a body defining a ring opening and having a circumference of substantially circular configuration at formation of a slotted gap to define confronting ring ends. The body defines a ring plane and an axis of symmetry and has a radial width which continuously increases, at least in sections, from the ring ends onwards at both sides of the axis of symmetry. Each of the ring ends has a L-shaped configuration and is extended by a lug jutting out from the ring plane and formed with a throughbore. Both lugs of the ring ends are positioned on a same side of the ring plane, with the throughbores of the lugs extending in parallel relationship to one another and to the ring plane.

Abstract: A push nut having a washer member and a push spring with radial blade pieces arranged like a truncated cone serves to firmly retain a shaft or rod onto a frame or chassis of an electrical appliance or the like. The push nut, comprising the washer member and the push spring connected by one or more connectors, can easily be formed in one body by cutting or punching out an elastic plate into an elementary flat plate and folding the elementary flat plate so as to place the push spring and washer member one on another. The push nut having the united push spring and washer member is easy to handle and produce.

Abstract: A push nut formed of an annular rim and an elastic prong member having a fragile portion capable of being easily bent with a pushing force can be easily engaged with a rod-shaped article such as a shaft, consequently to firmly secure the rod-shaped article onto a frame of an electrical appliance or the like. The fragile portion of the prong member is formed by one or more slots, thin-walled parts, or grooves. The push nut engaged with the rod-shaped article can easily be disengaged by pressing down the prong member with a cylindrical tool to bend the prong member at the fragile portion, so that the rod-shaped article can be freed from the frame of the electrical appliance with little damage and can be reused effectively.

Abstract: A pivot joint includes a housing surrounding a rotatable shaft. A retainer clip frictionally engages the shaft and seats against one end of the housing to fixedly axially position the rotatable shaft and the housing with respect to each other and to a rotatable lever connected to one end of the rotatable shaft. In one embodiment, the rotatable shaft is hardened and the retainer clip is hardened to a higher hardness than the hardness of the rotatable shaft. In another embodiment, a pair of retainer clips frictionally engage opposite ends of the rotatable shaft and seat against the rotatable lever and one end of the housing to form a fixed dimensional relationship between the housing, the rotatable shaft and the lever. The retainer clip may include notches formed on the edge of a frusto-conical annulus surrounding a central aperture in the retainer clip to form a discontinuous shaft engaging surface.

Abstract: A combined retainer clip and shaft for axially fastening a mechanical element to the shaft includes a shaft being hardened to a predetermined hardness. The retainer clip is formed of an annular body with a frusto-conical annulus surrounding a generally central aperture and hardened to a hardness higher than the hardness of the shaft. The retainer clip is mounted on the shaft at a predetermined position to fixedly mount the mechanical element on the shaft. In one embodiment, a plurality of notches are circumferentially spaced about the portion of the annulus surrounding the aperture in the body to form a discontinuous shaft engaging surface.

Abstract: A fastener useful for attaching components of an eyeglass frame together. The fastener includes a pin having a smooth or fluted shank and a belleville washer having a hole for receiving the shank, the hole being sized to provide an interference fit with the washer. The washer is made from a titanium nickel shape memory alloy in an optimized elastic condition. The optimized elastic condition is provided by work hardening a sheet of Ni-Ti and cutting or stamping the washer out of the sheet. The washer is also plastically deformed into a conical shape.

Abstract: A rock bolt is provided for insertion into a bore in the roof or side wall of an underground opening so as to stabilize the roof or wall of the opening. The rock bolt comprises a generally hollow elongate body having a side wall wherein the side wall has a flute formed from a pair of inwardly disposed wall portions interconnected at their respective inboard ends to form a hinge. The hinge is responsive to forces applied to and along the side wall by the bore so that the rock bolt may be deformed in the bore to accommodate stresses and strains placed upon the bolt during use without substantially weakening the strength of the bolt held in the bore.

Abstract: A roller cam follower, especially an engine hydraulic roller lifter, is restrained from rotation away from a position in which the roller rotates squarely on its associated cam by a retainer clip fixed on the lifter body and having a tang with flat sides engaging an axial groove in an associated bore of the engine lifter gallery. The retainer clip is a closed ring with opposite flexible hat sections connected by arches having inner edges that snap into a groove on the lifter body. The inner edges are preferably angled upward to aid installation and the hat sections preferably have squared inner ends that engage flats on the lifter body to prevent relative rotation of the body and clip.

Abstract: The disclosed retainer is useful in tying together sections of concrete or like elements; e.g., in roads, highways and the like, especially where a new section is laid next to and is positively joined to an existing section by several dowels inserted into drilled holes in the old section and left protruding to interlock with the poured new section. The function of the retainer is to slip over the dowel to abut the old section and to prevent leakage of the grout or other adhesive used to cement the dowel to the old section. The retainer of the present invention is preferably a disk of relatively stiff but flexible material having a central circular opening to fit frictionally over the dowel.

Abstract: An improved, thin walled fastener for retaining studs, rods, or the like is provided. The fastener is of the push-on type comprising a one-piece, generally thin, stamped sheet metal resilient body defining a generally centrally located stud retaining aperture for receipt and retention of studs, rods or the like. The body is preferably generally frusto-conical or dome shaped in cross section. The fastener is formed by punching or shearing a hole in a blank and then forming a generally dome shaped impression in the blank, the impression being generally coaxial with the axis of the punched hole. The required transverse extensions of the body are minimized by the utilization of the relatively smooth continuous edge of the punched hole rather than the burred edge of a punched hole as the stud retaining edge of the fastener stud retaining aperture.

Abstract: A method and apparatus for tunnel lining is provided made up of arcuate liner segments having a formed body with two end walls and two substantially parallel sidewalls, at least two pins extending from one sidewall intermediate its length in the median plane of the body and transverse to said sidewall, a like number of openings in the other sidewall each adapted to receive one of said at least two pins from two adjacent interfitting segments and locking means in said opening permitting insertion of said at least two pins in said openings of adjacent segments and lockingly engaging the same against removal and urging said two adjacent fittings into tight end to end engagement.

Abstract: A piston and cylinder assembly for a vehicle hydraulic system has a retaining device comprising an insert acting between a piston and the cylinder bore in which it works, the insert having a releasable frictional engagement in the bore and acting as an abutment to hold the piston in its retracted position to maintain the effective length of the assembly at a predetermined value for installation, until the assembly is operated hydraulically. The assembly may be an actuator for a self-energizing disc brake, or a slave cylinder for a vehicle clutch system.

Abstract: The lead reservoir and feed mechanism of a knock type mechanical pencil is secured to the tubular barrel in which it is housed by a resilient locking sleeve positioned in a groove near the front of the feed mechanism and a spring compressed between a rearwardly facing internal abutment on the feed mechanism. The spring urges the lead reservoir and feed mechanism rearwardly into the barrel to a position where an external flange on the locking sleeve abuts the front end of the barrel.

Abstract: Washer or supporting plate with means preventing the sticking together of the washers in a magazine. Said means are formed by protrusions. The method for manufacturing the washers as well as the device make the protrusions such that in the stack they are staggered with respect to the protrusions of a preceding and a next washer.

Abstract: Disclosed is a compensating roll pin securing a heat sink to a circuit board. The roll pin comprises a deformable body of resilient material, such as annealed spring steel, formed into a generally cylindrical body having first and second end portions separated by a middle portion of enlarged external diameter and an axially extending gap in the surface of the body. A method of use is also disclosed wherein the first end portion of the roll pin is inserted into an aperture in a heat sink and the middle portion deformed within the aperture to form a tight fit between the pin and heat sink. A substantial part of the middle portion remains outside the aperture in the heat sink. The second end portion is inserted into a hole in a circuit board and forms an interference fit therewith. The middle portion forms a stop to prevent further insertion of the roll pin into the circuit board so that a gap of predetermined distance separates the heat sink and circuit board to enhance cooling.

Abstract: A push-on type fastener (40) is provided for securing a cylindrical member such as a stud shank to an object. Fastener (40) includes generally axially aligned entrance opening (4) and exit aperture (6) surrounded by a resilient hollow projection (2) having a circumferentially continuous side wall. Aperture (6) is a non-circular opening defined between at least two retaining edges of projection (2) that are operative to provide engagement with the cylindrical member enabling the member to slide axially through exit aperture (6) from entrance opening (4) but inhibit movement in the opposite direction and which respectively include warped arcuate sections (3) adjacent the intersection between the respective extermities thereof that are operative to provide a stiffener for the retaining edges for smaller shank diameters and to stretch and prevent the retaining edges for splitting for larger shank diameters.

Abstract: A positionally bistable domed annular disc includes a projection which engages a transverse through hole or a recess in a shaft to be retained. The disc fits concentrically about the shaft and is concave in different directions when in its two stable positions, respectively. In a cotter pin embodiment the projection extends from the outer rim of the disc and is bent to fit solidly in a transverse hole in the shaft. The projection is inserted when the disc is convex toward the hole and not surrounding the shaft. When switched to be concave toward the hole the disc surrounds the shaft to preclude longitudinal and rotative movement of the projection. In a retainer ring embodiment the projection is a plurality of fingers extending from one or both rims and arranged to engage the shaft or the bore in which the shaft is retained in its closed position. In a shaft coupling embodiment the projecting fingers engage two or more shafts in a manner which tolerates axial, radial and angular shaft misalignment.

Abstract: A hinge mounting plate on which a hinge arm is fastenable is adjustable in one direction and fastenable to a furniture part, for example a furniture side wall, by means of fastening screws extending through elongated holes in the mounting plate. In each elongated hole is provided two flaps projecting from the rim of the hole having free front faces pivotally holding the respective fastening screw. The fastening screws have countersunk heads, and when the fastening screws are inserted the countersunk heads press the flaps away from the screw cores.