Abstract: A segmented nut has inner segments and an outer sleeve. Part of the sleeve interface portion and part of the segment interface portion engage when the sleeve rotates relative to the inner nut during release of the segmented nut with part of the segment interface portion at a greater distance from a central axis of the segmented nut than a minimum distance of the at least part of the sleeve interface portion from the central axis. One or more of the segments can include a retainer preventing the sleeve moving toward a free face of the segment(s). One or more of the segments can have a flange portion providing an increased working (compression) face relative to a plain segmented nut. An assembled segmented nut can include some radial freeplay for the segments to move radially whilst being retained within the sleeve prior to application of the segmented nut to a threaded bolt, stud or rod such that threading of the segmented nut onto the thread of the bolt, stud or rod removes the freeplay.

Abstract: A joint device for screw and nut includes a first body and a second body. The first body is provided with a plurality of first internal threads, of first external threads, and a first protrusion. The first protrusion is extended with a first engaging portion. The second body is provided with a plurality of second internal threads, of second external threads, and a second protrusion. The second protrusion is extended with a second engaging portion, such that the first protrusion and the second protrusion can be engaged with each other. When in a joining status, the first engaging portion and the second engaging portion are engaged with each other, such that the first body and the second body are folded up and around the screw. The nut can therefore screw up the first body and the second body correspondingly.

Abstract: A segmented nut is formed by three segments held together with a surmounting sleeve. Rotation of the sleeve in the order of 60° frees the segments, allowing for quick release of the nut.

Abstract: A fixing device used for fixing a pivot shaft includes a latching member and a fastening member. The latching member has a hollow conical latching portion. The fastening member defines a conical hole corresponding to the conical latching portion of the latching member. The latching member is capable of deforming elastically along a radial direction, and the fastening member is tightly sleeved on the latching portion of the latching member.

Abstract: A thread clamping device is described including a plurality of movable nut segments around a threaded rod, and spring members flexibly holding the segments against the rod. Smaller locking distances are shown to result by using at least one double-threaded segment as a component of the thread clamping device. Such a thread clamping device can advantageously be used as a component of a self-adjusting shrinkage compensation device, a coupler for threaded rods, hold-downs, among other uses.

Abstract: A tensioner for tensioning foundation bolts generally used in securing large utility towers is provided. The tensioner generally comprises a hollow outer body through which the foundation bolt can extend. The lower end of the body, which is adapted to abut onto the foundation surface from which the bolt extends, is provided with an opening allowing access to a foundation nut threaded onto the foundation bolt. The upper end of the outer body slidingly receives therein an inner body with which it defines an annular hydraulic piston, the inner body being configured with a seat portion for receiving and engaging a split nut mounted to the foundation bolt. Upon providing hydraulic fluid to the tensioner, the hydraulic piston urges the split nut, engaged to the foundation bolt, upwardly, thereby tensioning the foundation bolt. The load in the bolt is then maintained by threading down the foundation nut until it abuts onto the foundation surface.

Abstract: The present invention relates to a thread clamping device including a plurality of movable nut segments around a threaded rod, and spring members flexibly holding the segments against the rod. The thread clamping device has a structure adapted to accommodate substantially planar outer surfaces of the segments engaging planar surfaces of the end housing of the device, leading to a more robust device and improved performance. Such a thread clamping device can advantageously be used as a component of a self-adjusting shrinkage compensation device, a coupler for threaded rods, hold-downs, among other uses. Various embodiments of the thread clamping device include a multi nut configuration, a quick release, and including mechanical or magnetic clip attachments.

Abstract: A fastener assembly includes a washer element and a nut element. The nut element is split and includes a screw thread that threadably engages the thread of a bolt or other such fastener element to lock the nut to the bolt. The nut element is adapted by the split to assume an open configuration which permits the nut to move freely along the bolt without being threadably engaged with the bolt and a closed configuration which threadably engages the screw thread of the nut with the screw thread of the bolt. The washer is sized to move freely over the screw thread of the bolt, but to force the nut into the closed configuration when the washer and the nut are cooperatively engaged. The washer maintains the nut in threaded engagement with the bolt when the washer and the nut are cooperatively engaged on the bolt.

Abstract: A fastener includes a sleeve-like clamping element having a cavity extending in the direction of its longitudinal axis which accommodates a threaded stud. At least one clamping region is deformable into the cavity forming at least one clamping ramp inclined toward the longitudinal axis on an outside of the clamping element. A clamping sleeve pushed onto the clamping element in an installed state grips around the clamping element. A clamping sleeve inner surface cooperates with the clamping ramp so the clamping region reaches a clamping position deformed into the cavity to hold the threaded stud. The clamping element has a forward end flange in an installation direction. Coupling elements and mating coupling elements arranged on the flange and a clamping sleeve end facing the flange interlock in the installed state, preventing rotation between the clamping sleeve and clamping element.

Abstract: A measuring device is provided, having a cylindrical connection piece (1), having a collar (2) which engages around at least one section of the connection piece (1) and is to be fastened at a measuring location, having a restraining means, by which the connection piece (1) is fastened in the collar (2), having an annular seal (3), which is arranged in the collar (2) and bears in a sealing manner against the connection piece (1), and having a thrust ring (4) which is releasably fastened in the collar (2), and, in an end position, puts the seal (3) under pressure in the axial direction, with which device mounting and demounting at the measuring location take place in one operation and with which device, during mounting, the fastening of the connection piece (1) takes place before or at the same time as the restraining of the seal (3), and with which device, during demounting, first of all the seal (3) is released and then the fastening.

Abstract: A solenoid valve is disclosed including a valve housing having a central bore and a valve seat, a valve element movable between an open position allowing fluid to pass through said valve seat and a closed position in sealing engagement with said valve seat, a valve operator for moving the valve element between the open and closed positions including a reciprocating armature plunger member extending through the bore and an armature secured to the armature plunger, and the valve seat when the valve element is in its open position without creating a path of leakage when the valve element is in its closed position. The armature plunger includes a threaded-end portion which extends from the valve seat for receiving a valve assembly which is provided with a top portion forming a sealing face and a bottom portion having a central opening adapted to receive the threaded end portion of the armature plunger.

Abstract: The invention is intended to provide a fastening structure made up of a nut and a to-be-tightened member which does not get loose even when used in places where it is subject to large vibrations. The nut has a cylindrical female screw extension portion which projects from the seat of the nut and which has a female screw formed in the inner circumferential surface thereof. The to-be-tightened member which is on the male screw side is formed with a fastening hole into which the female screw extension portion is to be fitted. The inner surface of the fastening hole and the outer surface of the female screw extension portion are tapered so that there is a taper angle difference. As the nut is fastened onto the male screw, the female screw extension portion is pushed inwardly and deformed due to the taper angle difference so that the female screw formed on the female screw extension portion is pressed against the male screw.

Abstract: A piston rod, having a threaded end, is threadedly received in a split collar which is (a) internally threaded and (b) externally tapered. The collar is received in a tapered bore formed in a cross-head. The crosshead has a plurality of threaded holes formed therein to receive studs which penetrate a pressure plate. Nuts secured to ends of the studs draw the plate against the collar to cause its threads to fully engage the threads of the rod end, and secure the collar in place. The rod, of course, can be turned in the collar, threadedly to adjust its axial positioning in the collar.

Abstract: A self-locking lock nut assembly comprising working nut part (9) possessing a split annular sleeve extension upon which is mounted by springing locking part (10), which utilizes only the energy of vibration to translate counter-clockwise rotation of locking nut part (10) in a disengaging mode into a radial grip onto threaded bolt (6) through the split annular sleeve of working nut part (9) to prevent loosening counter-clockwise rotation of working nut part (9). The self-locking lock nut assembly possesses the capacity for a dynamic locking response to all modalities, directions and intensities of vibrational input to the degree required and proportional to the energy of vibration.

Abstract: A castellated locknut having an annular ring and a set of castellations, wherein the castellations are tapered to provide a locking mechanism. The locknut is provided with a circumferential groove formed between the castellations and the annular body which ensures that the castellations have equal base cross-sectional areas, such that the castellations deflect uniformly upon mounting to a shaft. Further, the provision of the circumferential groove renders the annular ring torsionally flexible as compared to the flexural stiffness of the castellations. Upon mounting to a shaft, the annular ring of the locknut elastically and torsionally deflects, thus allowing the castellations to pivot clear of the shaft without undesirable inelastic deformation. Accordingly, a precise and uniform locknut having an effective locking mechanism is achieved.

Abstract: A nut 15 for clamping a tie rod securing a rock has a tubular nut body 25 with a buttress thread 28. The nut body is subdivided into segments 31 by several elongated slots 30. The segments are connected by elastic ribs 26 whose cross-section is U shaped. On one end of the face the nut has a convex spherical end flange 17 which rests against an anchor plate 19. The slots extend through the flange as far as the inner wall of the ribs. Between the ribs the flange has radial notches 37, which extend as far as the nut body. In this manner the segments 31 are tangentially flexible. To clamp the tie rod, the nut is slid axially on the buttress thread of the rod. A clamping device with jaws reaches into the thread of the rod at its free end, and rests against the nut 15. When the tie rod is pulled with the jaws, the nut 15 is simultaneously forced against the anchor plate. Thus, a fast and accurate preliminary clamping of the tie rod is achieved.

Abstract: A quick lock and release fastener in the form of a split nut with a circumferentially truncated thread and drawn together or separable by a cam operable by rotation in one form or by reciprocation in a second form, to be placed over an externally threaded member and threadedly engaged therewith by a fractional turn of a head in the first form, or by reciprocation of a head in the second form, with spring return for separation of the split nut, and with constrictive engagement with the workpiece to be fastened.