Abstract: A bone fixation clamp includes first and second clamp members, a stud, and a locking nut. The first member extends along a curve corresponding to an outer surface of a first portion of bone and includes an opening extending therethrough along an axis extending adjacent to the bone. The second member extends along a curve corresponding to an outer surface of a second portion of bone. The stud is receivable within the opening of the first member. The nut includes a threaded channel threadedly engaging a portion of the stud so that, when the first and second members are in the operative configuration, the nut is threadable over the stud to fix the first and second members over bone. The nut includes an anti-loosening feature which, when the nut is threaded over the stud, results in an interference with threading along the stud.

Abstract: A pinion to be fitted on a turbine axis of an internal combustion engine, wherein said pinion is made in a single piece, equipped with an axial thread to screw it on said axis of the turbine, wherein an axial end of the pinion integrates/defines a disc spring.

Abstract: Assembling method of a pinion on a turbine axis of an internal combustion engine, wherein said pinion is made in a single piece having axial symmetry and equipped with an annular toothed part and with an axial part coaxial with said annular part and provided with a coaxial hole with a thread to screw the pinion on said axis of the turbine, wherein said thread has localized pitch variations.

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

Abstract: A locking nut comprising at least two nut portions and at least one frangible bridging portion and a method of making a locking nut. The nut portions are made from a single nut. Each nut portion has an outer gripping surface and a centrally disposed threaded aperture for receiving and engaging a screw. The bridging portion is integral with the nut portions and is disposed to a side of the aperture adjacent to the gripping surface. The nut portions are disposed on either side of the bridging portion so that the apertures are axially aligned, the threads are aligned and a space is defined between opposing faces of the nut portions. By applying torque to one of the nut portions relative to the other nut portion, the bridging portion is sheared and opposing faces of the nut portions are brought into contact and the nut portions are locked in place.

Abstract: The present invention has been made to solve the above problems, and accordingly an object thereof is to provide a looseness preventive nut which does not loosen even if vibrations are applied, and can be used as a single nut. In at least a first embodiment, the invention provides a looseness preventive nut 1 which is a nut threadedly engaging with a bolt 10, the nut being configured so that a lateral groove 3 extending in the radial direction in the range such that at least a part of a threaded portion 2 is cut, preferably in the range beyond the centerline C of the nut, is formed at a position slightly lower than a substantially middle point of the nut in the height direction.

Abstract: A self-locking threaded element that is used, for example, in a tool receptacle of a grinding tool. The self-locking threaded element comprises a retaining member (1) and a main part (3) axially disposed relative to the retaining member (1) at a distance (a) and connected with the retaining member (1) by a connection web (2). The main part (3) and the retaining member (1) are interspersed with a thread (4) for engaging a counter-thread. The retaining member (1) is displaceable relative to the main part (3), at least in the longitudinal direction (L) of the thread (4), to provide a self-locking threaded element that is inexpensive to manufacture and enables both simple tightening and loosening of the threaded element.

Abstract: A screwed connection has a first connecting means with an external thread and a second connecting means with an internal thread. In order to avoid self-slackening of the screwed connection, the external thread has a denticulation (14-16) which interacts with a mating denticulation of the internal thread.

Abstract: This invention relates to a lock nut in which, when a double nut is fastened against a bolt, projections at the lock nut are deformed and crushed to be applied around the threaded part of the bolt and a frictional force is increased to improve an effect of looseness-prevention. A seat surface of a circumferential edge of the threaded hole 4 of the nut 2 is formed with a plurality of projections 5, 5, 5, the nut 2 is fastened against the fastening nut 7 already fastened against the bolt 6 acting as a member M to be fastened with its projections 5 being faced to the nut, the projections 5 deformed between seat surfaces 3, 8 of both nuts 2, 7 are applied around the threaded part between the threaded hole 4 of the nut 2 and the threaded part 9 of the bolt 6 so as to enable both nuts 2, 7 to be prevented from being loosened.

Abstract: A lock nut threadably engageable and lockingly retainable about a threaded shaft extending through a workpiece, the lock nut having at least one deformable slot disposed on a side portion thereof and disposed transversely relative to the lock nut bore axis, the lock nut also having a nut deforming member protruding from a bottom end thereof, wherein at least a portion of the nut deforming member is in substantial axial alignment with the deformable slot. The lock nut is undeformed prior to installation thereof about the threaded shaft. The nut deforming member is engageable with the workpiece to deform the lock nut upon threadably installing the lock nut about the threaded shaft, thereby retaining the lock nut thereabout, whereby the lock nut has a relatively consistent torque performance with reduced statistical spread over several installation and removal cycles of the nut about the threaded shaft.

Abstract: An adjustable lock nut comprising a one-piece annular body having an internally threaded axial bore extending between and faces of the body and a circumferential outer face. The body has a narrow annular internal groove that opens intermediate the ends of the axial bore and extends generally radially outwardly from the axial bore. A set of radial bores extend into the body at circumferentially spaced locations with their axes disposed in a plane normal to the body axis and bisecting the internal groove and the radial bores each include an internally threaded outer end portion and a threadless conical inner end portion, configured to form semi-conical recesses in the body at opposite sides of the internal groove adjacent the internally threaded axial bore. An externally threaded screw in the outer end portion of each radial bore actuates a wedge that engages the semi-conical recesses to apply separating forces thereto.

Abstract: A lock nut assembly for vehicle axles includes a pair of cooperative annular nut members hang threads formed on the inner peripheral surfaces compliment--and cooperating with the externally threaded shank of axle spindle. The nut members are coupled together threaded fastener means and spaced axially from one another. The threaded fasteners are to be tightened when the nut members are tightened on the threaded axle spindle to form a high stressed clamping force between the threads of the nut members and the threads of the axle spindle.

Abstract: An article engagable and retainable about a threaded shaft, which in one embodiment is a self locking nut a first end, an opposing second end, and a threaded bore with an axial dimension for receiving the threaded shaft. A plurality of resilient posts extend along the body member and are inclined inwardly toward the bore axis to provide a prevailing torque on a threaded shaft disposed in the threaded bore. A pair of resilient arms with end portions extend from each resilient post. Each resilient arms is inclined toward the second end of the body member to provide a prevailing torque on the threaded shaft disposed in the threaded bore. The resilient posts and resilient arms contribute to retaining the body member about the threaded shaft. The lock nut has a relatively low first installation torque and a relatively consistent torque performance with reduced statistical spread over several nut installation and removal cycles, which meet an established torque specification.

Abstract: A compact locking nut has a body provided with a threaded bore along which the nut engages a thread so that upon rotation it will advance over a thread to a position suitable for securing and positioning a machine component such as a bearing. The nut has a machined back face along which it bears against the secured machine component and a front face at its other end. The body contains two grooves--one external in that it opens outwardly from the exterior surface and the other internal in that it opens into the bore--and these grooves divide the body into a clamping section, a locking section, and an intervening web which is thin enough to flex with relative ease. The external groove lies closest to the back face, whereas the internal groove lies closest to the front face. On its exterior the body has lands which extend out to the front face. Typically, the body derives from a forging having the lands and a bore.

Abstract: A lock nut comprising an internally threaded body having an internally threaded bore and one groove opening at the bore and a second groove opening at the outer surface, the grooves are axially spaced apart and configured to divide the body into first and second end ring portions and a thin axially relilient intermediate portion integral with the end portions. The body has a plurality of internally threaded openings extending inwardly from the outer surface and externally threaded secews threaded into the internally threaded openings and configured to wedge the end ring portions axially away from each other when the screws are threaded into the openings.

Abstract: A locking nut includes a main ring having a threaded bore, a front end face at one end of the bore and a counterbore at the other end of the bore. Actually, the threaded bore opens into the counterbore through a recess which in turn opens out of a shoulder that forms the end of the counterbore. The main ring also has threaded holes which open out of the recess around the threaded center bore. In addition to the main ring, the nut has a secondary ring which fits into the counterbore and against the shoulder of the main ring. In the region of the threaded holes the secondary ring is relieved to the extent that it has a lesser diameter than the recess. The secondary ring also has a threaded bore, the thread of which matches the thread of the bore for the main ring. Indeed, the threads for the two rings are cut in the same machining operation, so that no interruption in pitch exists between the threads of the two rings.

Abstract: A locking member being provided with a parallel to a side face running primary recess within an internal or external rim surface. This primary recess is dividing the member into a solid supporting portion and a first portion having a side face provided with a locking member, the depth of the recess being such that the member formes one integrated single piece. The side face of the first portion is divided by secondary cuts carried through a central point of symmetry forming a number of sectors corresponding to the number of desired locking members, the secondary cuts at the same time constituting gripping surfaces for tools for the manipulation and use of the member. The locking member also provides internal or external locking to an internal or external threaded but also non-threaded surfaces.

Abstract: A warp beam flange assembly has a warp beam flange and a clamping ring. The clamping ring is releasably clamped, along with the flange, by at least two clamping screws onto a warp beam tube. To simplify manufacturing, the clamping ring is fastened by at least two axial fastening screws onto the flange outer surface and is supported directly on the flange outer surface by at least two rests. The rests are circumferentially offset from one another and form between them a clamping gap region in the shape of a segment of a circle. At least two axial clamping screws are circumferentially offset from each other and are located in the clamping gap region such that tightening the clamping screws in the clamping gap region reduces the space between the clamping ring and the flange outer surface and, as a result, induces flank pressure in a threaded engagement.

Abstract: In a rodless cylinder, a moving member which is moved along a cylinder body is reduced in height for the sake of compactness and stability. A stopper is mounted on a stopper support base, which is also reduced in height to preclude the possibilities of obstructing movement of the moving member, and includes a stopper lock mechanism with an adjusting screw suitable for use with the stopper support base of low height. More specifically, in a rodless cylinder having a stopper support base mounted on top of a cylinder body, the stopper support base is provided with inclined surfaces at the opposite ends thereof symmetrically in face to face relation with downwardly-facing inclined surfaces formed on opposite lateral side portions of the cylinder body, and firmly fastened to the cylinder body by setting bolts and clamp members having inclined surfaces face to face with the inclined surfaces.

Abstract: A clip on fastener (100) is provided that features a pair of spaced apart legs (2) and (6) extending from a closed end (9) to an open end (10) of fastener (100). Leg (6) includes a pair of resilient arms (16 and 18) that extend away from the side of the leg (6) facing away from leg (2) and end in overhanging relationship to an opening (7) through arm (16). Arm (18) extends towards closed end (9) and includes a guide tab (20) that extends angularly away from leg (2) towards open end (10). Tab (20) is operative to initiate separation of legs (2 and 6) to enhance receipt of an edge of a panel or plate (P) into open end (10).

Abstract: A height-adjustable steering column for motor vehicles which is retractable and extendible by means of a drive motor, comprises an inner steering spindle assembly of axially telescoping parts, of which an upper one is connected with the steering wheel, as well as a jacket tube in which an axially displaceable part of the steering spindle assembly is rotatable and is arranged axially displaceable in a housing inside the jacket tube. A coupling member drivable by the drive motor is axially non-displaceable relative to the housing and has a drive pinion which engages in a serration on the circumference of the jacket tube.

Abstract: A nut which is lockable on a threaded element comprises two annular parts (1, 2) connected by preferably resilient members (5). Locking takes place by tightening a screw (6) arranged in a threaded bore in one nut part and abutting against the other nut part. During tightening of the screw, the parts (1, 2) are displaced and/or skewed in relation to each other whereby locking takes place on the thread.

Abstract: A fastening nut, which by virtue of precisely located laser cuts and the application of predetermined torque to a grip member, is enabled to break into several parts, one of which can be used as a jam nut. The nut is provided with an internally threaded sleeve, a grip member and interconnecting means, the latter of which may be provided with one or more shear areas by virtue of a series of laser cuts. At a predetermined torque on the grip member, the sleeve is sheared from the interconnecting means and grip member and, as a second embodiment, the interconnecting means may be provided with internal fastening threads so that further torquing of the grip member drives such interconnecting means into the sleeve and thereafter a second shear separation is effected to remove the grip member from the jam nut.

Abstract: A swivel chair having a main screw connected to the chair seat and rotatably supported in a mounting assembly on the chair base enabling rotation of the seat relative to the base without varying the height of the seat. Height adjusting apparatus provides for the selective adjustment of the height of the chair seat and includes a nut member threadably mounted on the screw member. The nut member has a thread that is deformed into frictional engagement with the screw thread and when a seating load is applied to the nut member, the magnitude of the frictional resistance of the nut to turning on the screw is increased. As a result, rotation of the chair seat and the screw member will cause the nut member to rotate relative to the mounting assembly and remain fixed relative to the screw member to prevent an unintended varying of the height of the chair seat when it is rotated during use, while still enabling manual intended rotation of the nut when the chair height is to be adjusted.