Abstract: An end cap system for scaffolding planks, especially for hollow core planks formed of fiberglass or other composite materials, is disclosed. The end cap includes an extrusion having a plank-receiving portion on one side and a rib profile on the other side for slidingly receiving scaffolding hooks. A reinforcing member is placed in the hollow core, extending between its walls, and surrounding the fastening device securing the end cap to the plank, to resist deformation of the plank by the compressive force of the fastening device. The end cap permits similar parts to be used for a wide variety of plank widths and allows for replacement of damaged hooks or the exchange of hook configurations, such as between "high" or "low" hooks.

Abstract: A device to be used in inserting the individual tension elements of a freely tensioned tension member, for example, a stay cable for a cable-stayed bridge, into a tubular sheathing. A guide element to be attached to the front end of an individual element includes an expansion member whose diameter in its non-expanded state corresponds approximately to the diameter of the individual element, while the diameter in the expanded state is greater than the diameter of the individual element.

Abstract: An apparatus for dispensing multizone disposable testing strips which are inserted in the apparatus by a user. The apparatus has, for the strips (34), a circulation passage (29) in which a cursor (35) is able to slide, each strip being able to be coupled to the cursor. Ratchet members (54, 57, 62a to 65), associated with a driving member attached to the cursor, are arranged so as to enable the step by step movement of the cursor in the direction of the opening (28) of the passage (29) from any position in which the cursor can be, this being achieved via a direct driving of the cursor. Accordingly, it is always possible to bring the cursor back into a position where it is near said opening. The apparatus can be applied to object dispensing devices, such as medical tablets, or to blood sugar level measuring devices.

Abstract: A clamp for supporting a bicycle is formed of two like halves joined by a single central bolt. The clamp halves are urged apart by a single central spring surrounding the bolt. Each half of the clamp has a pair of concave cylindrical segments, one for receiving a tubular member of a bicycle and the other for receiving a tubular portion of a bicycle support rack. Each cylindrical segment is lined with a resilient protective material to prevent damage to the bicycle frame as well as to insure a firm grip on the tubular members and allow the clamp to accommodate a range of tubular diameters.

Abstract: A rotary drum scanner comprises a rotatably mounted hub, a drum detachably mounted to the hub and an interlock mechanism which locks the hub against rotation until the drum is locked to the hub.

Abstract: Apparatus and method for joining a piston in a precise leak proof junction on a rod utilizes an axial longitudinally elongated reservoir (A) in a bore within the piston which serves as a receptacle for a bonding agent (B), an annular groove (C) in the piston rod serves to position an O-ring member (D) serving as a support for the piston and as a closure on one end of the reservoir.

Abstract: A bus bar panel system utilizes a quick acting and simplified fastening system for making connections. The bus bar is preferably pre-perforated along the edges, although holes may be drilled at the time of fastening. The fastening system uses a stud having threads on one end for receiving the usual washers and nut. On the other end, usually away from the installer, the stud is provided with flats which engage an open slot or yoke on a keeper clip. The clip has a gauge flange to engage the edge of the bar or clamp through which the stud extends. The transverse dimensions of the open slot are related to the flats and the length of the slot to the distance of the perforations from the edge of the bar. The clip also includes a spring section which grabs the end of the stud holding the clip in place so that the installer has both hands free to secure the nut and washers.

Abstract: A striking tool assembly comprises a tool head including a tool eye having disposed therein a sleeve member for receiving an elongated tool handle to perform a manual tool work operation. A flexing structure enables the annular wall structure of the sleeve member to temporarily collapse inwardly for a retaining section to be located in a sleeve securing position when the sleeve member is moved in a longitudinal axial direction into the tool head eye. The sleeve member includes a tool eye mating portion and an overstrike portion. The tool head system comprises a plurality of tool heads each of which is effective to perform a different manual work operation. The sleeve member of each tool head assembly has an inner tapered bore including an inner frictionally mating surface effective to frictionally mate with a preselected elongated tool handle, which may be used interchangeably with each tool head of the tool head system.

Abstract: An arrangement for fastening a line holder on a wheel control element of a braked wheel, with releasable fasteners by way of which a fastening limb of the line holder can be fixed on a mating surface of the wheel control element. In order to be able to provide brake cooling without excessively increasing the unsprung wheel mass or increasing the work involved in assembly to any considerable extent, a baffle arrangement for deflecting a flow of cooling air can be mounted on the wheel control element. The arrangement can be fixed simultaneously by the fasteners of the line holder.

Abstract: A form fitted connection between an angular disc of an axial bearing on a connecting element with the angular disc bearing against an end face of the connecting element with the angular disc comprising at least one retaining lug engaging into an associated recess in an outer peripheral surface of the connecting element.

Abstract: An arrangement for coding a plug-in space of a plug-in module in a module rack by using a layout of at least one coding pin and at least one associated coding hole. The coding hole has at least one holding bracket through which extends a fastening screw, and the module rack has at least one front profiled rail which has a longitudinal groove into which there is inserted a perforated strip having equidistant holes. The holding bracket has a receiver for the coding pin, which receiver has an internal polygon. The coding pin is displaceable within the receiver and has a corresponding external polygon. The coding pin is provided with a longitudinally extending coding rib at its shaft. Also provided is at least one coding plug which has at least one pin for the introduction into a hold of the perforated strip. The coding plug has the coding hole for the coding pin and a through hole for the fastening screw. The coding hold is provided with an edge recess for the coding rib.

Abstract: The present invention is directed to a rod connector assembly for removably securing a control rod to a spider structure. The rod connector assembly includes a tubular boss fixedly secured to the spider structure and a mounting assembly which includes a receiving structure and a biasing structure. The assembly also includes a cap having a cavity formed therein, the biasing structure including a driver and disposed in the cavity such that the driver extends outwardly from the cavity and into the boss, and wherein the cap is secured to the boss. When the control rod is in a prescribed position with respect to the boss, the mounting assembly is operative to resist rotation of the control rod upon application to the control rod of an amount of torque less than a predetermined amount of torque.

Abstract: A cluster of seismic streamer cable utility modules is provided with a set of hinged latching members. The hinged latching members are adapted secure the cluster to the steamer cable by closing the hinged latches around corresponding collars mounted on the streamer cable. The collars form an inner race while the closed hinged latches form an outer race to allow free relative rotation between the streamer cable and the cluster of modules.

Abstract: The invention relates to a toothbrush (10), the brushneck (12) of which, connected to an exchangeable brushhead, is deflectably held, in a reversible, resilient manner, on a hollow handle (14) by a swivel joint (18) surrounded by a sealing element (16). The brushneck (12) is provided at its coupling end (20) facing the handle (14) with an articulated head (22). The handle exhibits at its coupling end (24) facing the brushneck (12) an articulated fork (26), between whose fork legs (28, 30) an articulated head (22) of the brushneck (12) is fitted-in and connected by a swivel axle (32). The sealing element (16) consists of a pressure-elastic material. The articulated fork (26) is itself of tension-elastic configuration, so that the sealing element (16) is held by the articulated fork (26) under elastic pre-tension between the mutually opposite coupling ends (20, 24) of the handle (14) and of the brushneck (12).

Abstract: A wiper device for a vehicle includes a pair of left and right pivot brackets. The pivot brackets are pivotably attached to a vehicle body through a pair of left and right elastic members at left and right mounting points, respectively. The wiper device has a connecting member for connecting the left pivot bracket with the right pivot bracket. A wiper motor unit includes a wiper motor and an unit bracket for mounting the wiper motor. The unit bracket is attached to the vehicle body through a center elastic member at a center mounting point shifted from an imaginary line passing through the left and right mounting points. Further, the unit bracket of the wiper motor unit is positioned on the connecting member so that a gravity center of the wiper motor unit rides on the imaginary line.

Abstract: The invention proposes a windscreen wiper of the type comprising a rotating motor shaft (12) and a driving head (10) on which a windscreen wiper arm is articulated, and of the type comprising coupling means between the driving head (10) and the free end (28) of the motor shaft (12), which is mounted in a seat (22, 24) formed in the driving head (10), which comprise rotational coupling means by cooperation of shapes (42) and axial clamping means (38) comprising a unit of the screw-nut type, characterized in that the rotational coupling means by cooperation of shapes comprise a series of teeth (42) associated with the motor shaft (12), angularly distributed in a regular manner around the axis (X--X) of the motor shaft (12) and angularly spaced in relation to one another and which cooperate with an associated bearing surface (23) formed in the driving head (10).

Abstract: A high visibility coupler for front end loader implements that is selectively mountable to the extendable arms of a front end loader and is attachable to implements, such as a fork. The structure of the coupler is such that it has a plurality of parallel lift ribs that are perpendicularly interconnected by cross ribs to form an open lattice type structure, thereby allowing the operator of the front end loader to easily see and manipulate the fork or other attachment, so that the object to be picked up can be easily and safely engaged. One embodiment of the high visibility coupler for front end loaders includes a male master, a carriage and a movable implement such as a fork. The male master includes a plurality of parallel lift ribs that are perpendicularly interconnected by cross members to form an opening wherein the male master is received and carried by lift pistons operative with the lifting arms. The male master carries a carriage which has openings aligned with the opening of the male master.

Abstract: An inexpensive and reliable method and apparatus for selectively coupling the bulb stem of an electrodeless lamp to a rotatable drive shaft does not require side access to a set screw or an RF sealing arrangement. The coupler accommodates angular and eccentric misalignment of threadedly engageable members at relatively low manufacturing costs. A cylindrical coupler connected to the bulb stem is provided with a cylindrical cross-hole extending diametrically through and exposing the proximal end of the bulb stem in the longitudinal bore. A seating lock nut of generally rectangular configuration, and having a pair of opposite compressible turned out comers or "wings", is insertable through the cross-hole and is loosely retained at the intersection of the bore and cross-hole. The seating lock nut is sized, relative to the cross-hole and longitudinal bore, such that, upon being released within the cross-hole, the lock nut is loosely retained.

Abstract: In a phase adjustment fixing apparatus for a cam, a cam fixing shaft is supported by a frame to freely move and has a clamp for clamping a cam at one end portion. A pressure unit is slidably supported on the cam fixing shaft and has a slidably supported lever. A spring member is interposed between the other end portion of the cam fixing shaft and the pressure unit. A sliding element is arranged at a swinging end of the lever to slide on a surface of the frame. An actuator swings the lever to move the sliding element between a cam fixing position where the sliding element slightly goes across a dead center and a cam fixed state releasing position where the sliding element largely comes across the dead center. A dead center is a position where the sliding element crosses a center line of the cam fixing shaft.

Abstract: The invention features a tool having a structure which rigidly secures the implement portion of a manual tool to its handle. The tool includes a handle having a first bore extending along a longitudinal axis and distal end of the handle, a washer having an aperture concentric with the first bore and disposed at the distal end of the, a ferrule disposed over the distal end of the handle and the washer, an implement including a shaft portion disposed through the aperture of the washer and within the first bore of said handle, and a fastening element cooperating between the ferrule and shaft portion to secure the implement to the wooden handle.

Abstract: A device for fixedly interconnecting two parts (1, 2) of a clothes hanger comprising at least one cylinder socket (3) on one part and at least one pin (4) on the other part to be inserted into the socket. The pin (4) has at least one non-cylindrical portion (9) with a radius exceeding the radius of the socket. This portion is flexible in the direction of insertion of the pin for wedging the pin in the socket after insertion.

Abstract: A drive hub spindle assembly for use in connection with a cylindrical broom (12) is provided which enhances power transmission and facilitates drive hub/spindle engagement. The drive hub (10) includes three radially projecting lugs (24) for engaging mating recesses (72) of the spindle (60). A novel reinforcing structure (52) associated with each of the lugs (24) is also disclosed. The hub (10) is self-centering and requires minimal manipulation during engagement.

Abstract: A universal wiper arm connector includes a generally inverted U-shaped outer seat having a central threaded hole at a top thereof and two downwardly depending arms each having an inwardly extending toothed portion. A generally inverted M-shaped inner seat is adapted to fit into the outer seat and has a recessed portion with a curved bottom and two downwardly depending arms formed at a lower edge with teeth adapted to engage with the toothed portion of the outer seat. A locking bolt having external threads is engageable with the threaded hole of the outer seat, whereby the connector can be engaged with wiper arms of different sizes.

Abstract: A fastening device is capable of holding securely the head tube and the handlebar sleeve in the front fork of a bicycle. The front fork is provided respectively at both upper end thereof and lower end thereof with a restraining ring which is of an arcuate construction and is capable of bringing about an automatic calibration so as to ensure that the bearing sets of the front fork cooperate properly and rotate smoothly.

Abstract: A joint spacer member for a pivotable connection between first and second yokes of a windshield wiper assembly includes a longitudinally extending U-shaped portion including first and second sides with a connecting side extending therebetween, the U-shaped portion having a first longitudinal end and a second longitudinal end, each of the first and second sides having a central section and resilient sections, wherein the resilient sections extend at an incline with respect to each of the central sections from each of the central sections to each of the ends.

Abstract: A strongback for lowering a tie rod into the downcomer annulus of a boiling water reactor during a shroud repair operation. The tie rod strongback is suspended from a cable via a cable adaptor at its upper end. The lower end of the strongback is coupled to a tie rod adaptor, which in turn couples to the top of the tie rod. The strongback is a welded assembly of square tubes, channels for reinforcing the joints of the welded tubes, and upper and lower couplings. In particular, the strongback has mutually parallel first and second rigid linear members which are disposed vertically when the strongback is suspended from a plumb cable. The second rigid linear member is connected to the first rigid linear member by a relatively obliquely disposed third rigid linear member.

Abstract: A windshield wiper frame connector for use in a windshield wiper assembly for motor vehicles which accommodates different size wiper arms, wherein the wiper frame connector includes a pair of slots, three pair of raised portions and a pair of stoppers on a pair of sidewalls for forming two pairs of spaces, upper and lower elongated seats, and an angled slot, a hole, and a bayonet lock tongue whereby a hook type wiper arm, or a pin type wiper arm, or a bayonet type wiper arm can be easily connected to a blade unit.

Abstract: The invention proposes a windscreen wiper device of the type comprising a rotating motor shaft (12) and a driving head (10) on which a windscreen wiper arm is articulated, and of the type comprising coupling means between the driving head (10) and the free end (28) of the motor shaft (12) which is mounted in a seat (22, 24) formed in the driving head (10), which comprise rotational coupling means by cooperation of shapes (42) and axial clamping means (38, 56) comprising a unit of the screw-nut type, characterised in that the seat (22) comprises a radial stop surface (23) which cooperates with a radial bearing surface (36) of the motor shaft (12) in order to define a precise axial position of the driving head (10) in relation to the motor shaft (12).

Abstract: A lifting and mounting apparatus that allows the control panel of a hyperbaric chamber to be removed. The lifting and control mounting apparatus has a pair of lifting lugs located near the axial end of the hyperbaric chamber. Each lifting lug consists of a vertically disposed lug plate having a lifting aperture. The mounting apparatus has a rectangular control housing which is sized to enclose the pair of lifting lugs when the control housing is in its operative position and attachment means securely connect the control housing to the lifting lugs positioned on the hyperbaric chamber. The attachment means allow the control panel to be demountably attached to the exterior of the hyperbaric chamber. A series of gas lines are attached to the control panel by a corresponding number of quick disconnect couplings. These quick disconnects allow the gas lines to be quickly and easily connected and disconnected from the hyperbaric chamber to the control panel.

Abstract: The device comprises a slide (3) so profiled as to be insertable in a support (2) in a slidable and coaxial manner with respect to an elongate element (1) and in intimate contact with the latter. This slide has two lateral lips (5) adapted to cooperate with ramps for clamping the slide and formed in the support (2), the lips and the ramps being inclined to the axis of the elongate element (1). The lips (5) are advantageously rounded and define an intermediate constricted part thereby achieving a self-clamping of each lip (5) of the slide (3) in the associated ramp of the support (2). The device supports an extremely high assembly prestressing without deforming or breaking, even when the prestressing is increased in an exaggerated manner, this being achieved with an overall size which is smaller than a screwed assembly of elements of a cross-shaped structure. Various applications in particular in the connection of a spinal osteosynthesis rod with a pedicular anchorage element.

Abstract: A windshield wiper frame connector for windshield wipers comprising an arrangement for receiving multiple hook-type wiper arms; thereby improving on the versatility and interchangeability of the wiper blades.

Abstract: An anti-deforming device for a steerer tube includes a tubular element, a first element, a second element, a driving element and a cap, the tubular element having two ends each of which has a tapered periphery for respectively engagement with a corresponding tapered skirt of the first element and the second element, the tubular element having a plurality of slits defined therein and having a plurality of protrusions and flanges extending outwardly from a periphery thereof, the driving element having a threaded rod passing through a plane hole defined in the second element and threadedly engaged to a threaded hole defined in the first element to force the protrusions and flanges to contact against an inner periphery of the steerer tube and the cap mounted to a top of the steerer tube by passing a bolt through a hole defined in the cap and threadedly engaged to the threaded hole of the first element.

Abstract: A two-piece television receiver console which has a mounting assembly that attaches a television receiver to a cabinet base. The mounting assembly includes a plurality of studs that extend through corresponding holes in the beznet of the receiver. The mounting assembly also contains spring loaded plates that capture the studs and attach the beznet to the cabinet base. A pair of brackets may further secure the rear wall of the receiver to the cabinet.

Abstract: A hollow drive shalt (20) with external splines (26) and drives a hollow driven shalt (14) which has internal splines (32). The driven shalt (14) thickness is uniformly tapered in the spline area, while the drive shalt (20) has a constant thickness through part of the spline area, and then a uniformly reducing thickness toward the unloaded end. The teeth of the external spline are crowned with the peak toward the loaded end of the drive spline (26). A flat is located at this peak.

Abstract: A seat post assembly for bicycles includes a seat post made from a hollow tube having a close top end and an open bottom end, the open bottom end of the seat post having an inner thread, an inner tube mounted inside the seat post for storing things, the inner tube having an inner thread at a bottom end thereof, and a stepped screw cap threaded into the inner thread of the seat post and the inner thread of the inner tube to hold the inner tube inside the seat post.

Abstract: Any improved break-away banner rod assembly (10) is provided which includes a fixture (12) adapted for coupling to an upright support surface (14) and having a laterally extending, slotted body (30), and a coupler (16) supported by the fixture (12) with a zone of weakness (42) therein. An elongated banner rod (18) is connected with coupler (16) and extends through the slot (34) of body (30). The body (30) captively retains the inner end (44) of rod (18) in the event of load-induced fracture of the coupler (16) at zone (42), and prevents significant downward movement of the rod (18). Preferably, the slot (34) permits movement of rod (18) through a restricted arc upon fracture of the coupler (16).

Abstract: A screen wiping apparatus comprises a crank which is coupled through a pivot pin to a crank arm, which may for example be part of a screen wiper arm, the pivot pin providing an articulation between the arm and the crank whereby to provide non-circular wiping. The pivot pin has a head joined by a first cylindrical portion to a second cylindrical portion of smaller diameter than the first, the head and the two cylindrical portions being coaxial with each other. The first cylindrical portion of the pivot pin passes through a sleeve fitted transversely in the crank, while the second cylindrical portion extends through the crank arm. At least one ring carried by the crank is immobilised against rotation with respect to the crank.

Abstract: A clamp device 10 including both fixed 10" and moveable versions 10' attached to a portion of a ladder adjustment apparatus 110 for engaging the rungs 101 of a ladder 100. The device 10 comprises a lower generally C-shaped jaw member 20 having a recess 26 to receive an adapter member 50 to grasp the rung of the ladder 100. The lower jaw member 20 is pivotally connected to a portion of the ladder adjustment apparatus 110 to accommodate the angular orientation of the adjustment apparatus 110 relative to the rungs 101 of the ladder 110.

Abstract: A receiving member for a pledge lock of a shopping or luggage trolley, wherein the receiving member is attached to the trolley handle and contains the pledge lock in its cavity, while projecting from each side of the receiving member is a pin whose cross-sectional shape and diameter correspond to the cross-sectional shape and diameter of the cavity of the handle section of the cart.

Abstract: An adjusting device assembly for making, a manual adjustment of a bicycle head bowl bearing comprises a front fork upright tube inserted into a head tube in which a bearing bowl is received. A bearing is received in the bearing bowl and can be located securely by an inner ring, which can be forced to move downwards by a locating ring which is in turn caused to move downwards by a clamping ring capable of being caused to move downwards by an adjustment bolt which can be fastened manually.

Abstract: A two-step and toothless bicycle head shaft bowl set has a two-step locking device making use of two semi-cylindrical members and an upper cover provided with a fastening bolt. The two semi-cylindrical members can be caused to effect the fastening by tightening the fastening bolt of the upper cover. The two-step locking device is capable of effecting an automatic alignment of centers of the component parts of the device in conjunction with arcuate lashing rings. The two-step locking device can also be used to enable the bearings to be positioned at an optimum horizontal angle so as to ensure a smooth rotation of the bearings and to eliminate the gap between two component parts.

Abstract: There is provided a cylindrical shaped slitter including first and second semicircular halves which may be connected together in only one possible way and having precision dynamic balancing. Each half has first and second mating ends. A land projects from the first mating surface of each half and a recess is received in the second mating end of each half. The recess in the first half receives the land from the second half, and the recess in the second half receives the land from the first half, thereby preventing axial and radial movement of the first and second halves relative to one another after they are connected together.

Abstract: A high visibility coupler for front end loader implements that is selectively mountable to the extendable arms of a front end loader and is attachable to implements, such as a fork. The structure of the coupler is such that it has a plurality of parallel lift ribs, that are perpendicularly interconnected by cross ribs to form an open lattice type structure, thereby allowing the operator of the front end loader to easily see and manipulate the fork or other attachment, so that the object to be picked up can be easily and safely engaged.

Abstract: A plastic chassis is provided in which a shaft is fixed to the chassis even if a snap fitting integrally formed with the chassis is broken. An arm member having a claw portion is formed around a through hole formed in the chassis. A protrusion having a top surface located a predetermined distance lower than a top surface of the arm member is formed around the through hole. When the shaft is inserted into the through hole, the claw portion engages with an annular groove formed near the end of the shaft so as to fix the shaft to the chassis. When the arm member is broken, a slit washer is engaged with the annular groove so as to fix the shaft to the chassis. The slit washer is disposed on the top surface of the protrusion.

Abstract: Clamping mechanism for clamping a plate to a base comprises an arm having a clamp head on one end and a sleeve slidably receiving the arm. The sleeve is mounted for rotation on an axis perpendicular to the arm. A drive is provided to rotate the sleeve from a first position to a second position in which the arm is disposed with its head in position to clamp the plate to the base and to slide the arm through the sleeve when the sleeve is in the second position to draw the head tightly against the plate and clamp it to the base.

Abstract: An assembly is provided for uniformly applying pressure to a selected portion of a circuit board mounted between spaced surfaces. The assembly includes a retainer for selectively applying pressure to a proximal surface of the circuit board and a stiff U-shaped bar having a channel in which the retainer is mounted, the bar thus being interposed between the retainer and the circuit board. Preferably, the retainer includes at least one member that is attached to the bar by a snap-in fit. When the retainer is actuated, the bar is pressed against the circuit board, thereby causing the opposite surface of the circuit board to uniformly press against a housing slot wall. A side wall of the bar preferably contacts a wall of a slot in which the assembly is mounted to enhance heat transfer.

Abstract: A compliancy joint for a robot has six degrees of compliancy freedom and comprises a housing having an inner ring. A float block is movably disposed in the interior of the housing and a plurality of circumferentially arranged pneumatic cylinders on the housing apply force circumferentially to the float block. Sensors are used to detect when the float block is near its compliancy limit and a controller is operatively connected to the sensors and the cylinders for preventing the float block from reaching its compliancy limit. This joint is able to break away from the robot should the robot exceed the device's compliancy limit, preventing damage to the robot and robot end of arm tooling.

Abstract: The sliding joint assembly for a first part and a second part having different expansion coefficients comprises a plurality of radially-acting spring blades connected firstly at first ends to the first part only in the vicinity of a contact interface, and secondly via second ends to the second part only in a zone that is axially remote from the contact interface, the contact interface constituting a sliding contact interface between the first and second parts while the second ends of the spring blades are connected to the second part by mechanical fasteners constituted by detachable screw-and-nut type assemblies provided with spring washers for damping forces exerted in the axial direction.

Abstract: A releasable coupling device for connecting two members to one another where a collet type fastener has normally retracted latching fingers insertable into a latching recess and a longitudinally movable expander for activating the fastener. The longitudinal movement is retained with a paraffin actuated system which can reset. The longitudinal movement of the expander in one direction is through a one way threaded ratchet system which provides an automatic locking action and the expander is movable in either direction by an independently operated threaded action.

Abstract: An engaging device for securing a handlebar stem of a bicycle includes a handlebar stem which has vertical and level portions, the level portion having an opening formed in a side wall of the level portion and communicating to an interior of the vertical portion, the vertical portion being a tubular element for receiving an upper end of a front fork therein. A main tapered element and two side tapered elements are disposed in the level portion through the opening, the main tapered element having a recess formed in a rear end thereof for engaging with the front fork and having a slant formed on lateral sides thereof, the side tapered element having a slant corresponding to that of the main tapered element. The main tapered element is forced to push toward the front fork with the recess by the side tapered elements when threading the bolt.