Abstract: An object of the present invention is to provide an anti-loosening device that exhibits its anti-loosening effect by means of an eccentric fit between a protrusion 12 of a nut 10 and a recess 22 in a nut 20, wherein the inclination of the nut 20 relative to the nut 10 when they have been tightened is minimized. The outer peripheral surface of the protrusion 12 and the inner peripheral surface of the recess 22 are constructed in such a manner that, with the nuts screwed to a threaded shaft S and an eccentric fit established between the protrusion 12 of the nut 10 and the recess 22 in the nut 20, the tapered outer peripheral surface portion 12a of the protrusion 12 interferes with the tapered inner peripheral surface portion 22a of the recess 22 along part of the circumference while a gap is formed between the distal-end outer peripheral surface portion 12b of the protrusion 12 and the closer-to-bottom inner peripheral surface portion 22b of the recess 22 along the entire circumference.

Abstract: Adjustment of a posture of a ball joint is facilitated. A support device includes a pan head unit, a ball joint having a first end to which the pan head unit is attached and a second end provided with a ball portion, a ball holder configured to selectively fix the ball portion, a ball fixing screw connected to the ball holder and configured to move the ball holder between a locked position at which the ball portion is fixed and an unlocked position at which the ball portion is freely rotatable, and an elastic member configured to urge the ball holder toward the ball portion. The ball holder and the ball fixing screw are connected to each other so as to be strokable with a predetermined stroke amount. The predetermined stroke amount is smaller than a movement amount of the ball fixing screw between a first position corresponding to the locked position and a second position corresponding to the unlocked position.

Abstract: A gravimetric measuring instrument that contains a weighing cell having a load-transmitting member. A load receiver can be coupled to the load-transmitting member through a releasable connection. A mechanical stop resides on the load-transmitting member, and a mechanical counter stop resides on the load receiver. By means of an eccentric bolt engaging the load receiver and the load-transmitting member, the mechanical stop can be pressed against the mechanical counter stop, whereby the stop can be clamped tight against the counter stop. With this arrangement, the load receiver can be rigidly but releasably secured to the load-transmitting member.

Abstract: A nut that includes a body having an aperture disposed within the body, threads located within the aperture of the body, and a plurality of gripping areas disposed along a circumference of the body. The plurality of gripping areas provides visual and tactile directional signals as to the rotational direction required to attach or detach the nut to or from a threaded member. The nut may be used for attaching a water filter system to a water faucet.

Abstract: A facilitated tightening device allowing a bolt to be inserted smoothly by preventing a screw block engaged with the bolt from being inclined or falling down, comprising a base (2) having a bolt-insertion hole (7) partly forming a bolt-receiving face (9) and a slope portion (8) gradually decreasing in radius toward the insertion side of the bolt (6) in a manner so as to match the bolt-insertion hole (7) formed therein, a running screw (3) slid along the slope portion (8) as a result of the axial movement of the inserted bolt (6) to be engaged with the bolt (6), a spring piece (5) that presses the running screw (3) in the downward, in the diameter-reducing direction of the running screw (3), and guide projections (10, 11) that engage with the running screw (3) so as to prevent the screw block (3) from falling down into the base (2). Also, a groove for the running screw 2b is formed in the base 2 so as to prevent said running screw 3 from wobbling in the circumferential direction.

Abstract: A tightening structure for locking, comprises a nut, a bolt, and a washer with a hole through which an axis of the bolt passes. To enable the structure to lock more firmly, a recessed part symmetrical with respect to an axis, and having a generally trapezoidal shape in cross section, is formed in the nut, and a projection, symmetrical with respect to an axis, and having a generally trapezoidal cross section is formed on the washer. The hole in the washer is eccentric to the projection of the washer.

Abstract: In a fastener comprising a bolt (3), a nut (2), and a washer (1), a bolt through-hole (5) which is slightly larger than a nominal diameter of the bolt (3) is formed in a base portion (4) of the washer (1), a conical barrel member (6) whose diameter decreases toward an upward position in a bolt axial direction is formed around the bolt through-hole (5) so as to stand therefrom, a continuous slit for a notched circle is formed in the base portion (4) and the conical barrel member (6), the diameter of the conical barrel member (6) of such a washer (1) is decreased by the fastening of the nut (2) and the bolt (3), and the conical barrel member (6) is fitted into a conical hole portion (10) of the nut (2), thereby obtaining a state where the conical barrel member (6) of the washer (1) is bitten and sandwiched between the bolt (3) and the nut (2).

Abstract: A bolt with a partially threaded shank has a plurality of locking grooves located on the shank between the thread and its head. The bolt is inserted through a component stack and spacing washers and a stepped reaction washer such that at least half of the locking grooves are left exposed. A deformable frusto-conical locking ring is positioned on a nut having a circular receiving cavity on one end. The nut and locking ring are positioned on the thread of the bolt and tightened so that the locking ring is deformed from a frusto-conical shape to a substantially flat disc such that its bore diameter is reduced, thereby retaining it within one of the locking grooves. The outer diameter of the receiving cavity abuts the stepped reaction washer.

Abstract: A locking apparatus includes an inner ring having a tapered outer shape and permitting a bolt of a fastener, with which construction elements are fastened, to pass therethrough, an outer plate formed with a tapered bore which receives the inner ring, a coil spring which urges the inner ring toward the outer plate, and a nut threadedly engaged with the bolt on the side close to an outer end of the coil spring. When an external force is applied to a construction so that the outer plate is displaced toward the nut, together with the construction element associated therewith, the outer plate applies a force, exerting in the direction axially of the bolt, to the inner ring. When receiving the force which has a component directed radially inwardly of the bolt, the inner ring is reduced in diameter to tighten the bolt, thereby preventing a further displacement of the outer plate and the construction element.

Abstract: A locking apparatus includes an inner ring having a tapered outer shape and permitting a bolt of a fastener, with which construction elements are fastened, to pass therethrough, an outer plate formed with a tapered bore which receives the inner ring, a coil spring which urges the inner ring toward the outer plate, and a nut threadedly engaged with the bolt on the side close to an outer end of the coil spring. When an external force is applied to a construction so that the outer plate is displaced toward the nut, together with the construction element associated therewith, the outer plate applies a force, exerting in the direction axially of the bolt, to the inner ring. When receiving the force which has a component directed radially inwardly of the bolt, the inner ring is reduced in diameter to tighten the bolt, thereby preventing a further displacement of the outer plate and the construction element.

Abstract: A lock nut device having a nut setting member fitted loosely to an outer circumferential part of a threaded shaft; split nuts divided in two in axial direction and fitted to envelope the outside of the nut setting member and fitted to the threaded shaft, the slit nuts having inner threads and a locking groove into which the nut setting member, at an inner surface of the nut setting member, is fitted and having an outer tapered thread at an outer circumferential part; and a lock nut having an inner threaded tapered surface in threaded engagement with the outer tapered threaded surface of the split nuts. To fix the nut setting member the threaded shaft, the nut setting member is placed around the outer circumferential part of the screw shaft and tightened to a prescribed position. The split nuts divided in two are fitted so as to envelop the outer circumference of the screw shaft and the nut setting member.

Abstract: A high-speed nut having two jaws capable of taking up two positions, one in which the central tapping is not engaged with a threaded rod, and a second in which the tapping is engaged therewith. According to the invention, the nut comprises two pieces (10, 11) which are hinged to each other about an axis (13), with pivoting of the pieces being caused by the front portion (15) of the pieces coming into contact with the object to be clamped.

Abstract: A locking nut is disclosed for locking engagement with an element such as a bolt, rod, stud or the like, the element having a cylindrical screw-threaded outer surface. The locking nut includes a main nut having a thread for engaging the cylindrical screw-threaded outer surface of the element. A cylindrical sleeve integrally contiguous to a first end of the main nut extends longitudinally therefrom. The sleeve has a cylindrically threaded interior surface for engagement with the outer surface of the element to permit longitudinal motion of the sleeve along the outer surface of the element. The cylindrical sleeve also has a cylindrically screw-threaded exterior surface, coaxial with the cylindrical sleeve interior surface, the threading on the sleeve exterior surface having a greater flank angle than the threading on the sleeve interior surface. A secondary nut threadedly engages the sleeve exterior surface, the secondary nut having a first end confronting the first end of the main nut.

Abstract: A nut type plastic fastener has a vertical penetrating space and a plurality of holding pieces facing one another with the space. The facing surfaces of the holding pieces are provided with ridges for engagement with threads of a stud. The lower portions of the holding pieces are connected by means of small-thickness flexible pieces to the lower portion of the fastener body defining the space. When a stud is passed through a gap defined between the holding pieces, the holding pieces are separated from one another as a result of the flexing of the flexible pieces.

Abstract: A threaded fastener apparatus that self-locks onto a threaded bolt only during the very last stage of threading and that provides a predetermined self-locking force that remains substantially constant despite multiple repeated uses. The fastener apparatus includes a nut carried loosely within a locking sleeve that is secured to a workpiece. Threading a bolt into the nut draws the nut's enlarged cylindrical rearward section into compressive engagement with the sleeve's smaller-sized cylindrical forward section, to deform the nut radially inwardly into locking engagement with the bolt. Longitudinal through-slots in the nut's rearward end facilitate the inward deformation.

Abstract: Quick action fasteners, nuts, and end-to-end couplers, which eliminate the need for time-consuming and labor-intensive threading of nuts, couplers, and the like to helically threaded reinforcing rod and sections thereof and to other types of textured surface reinforcing rod, particularly in environments in which the fastener will be subjected to high loads and/or torques. Fasteners according to the invention include a housing, a plurality of nut segments, and an end cap for retaining the nut segments in a specially shaped bore defined in the housing. The bore includes a tapered section and an expansion section; the nut segments are formed, along interior segment surfaces, to be closely engageable to a corresponding section of the reinforcing rod. The nut segments are also shaped, along their exterior surfaces, to be congruent with tapered section of the bore.

Abstract: Quick action fasteners, nuts, and end-to-end couplers, which eliminate the need for time-consuming and labor-intensive threading of nuts, couplers, and the like to helically threaded reinforcing rod and sections thereof and to other types of textured surface reinforcing rod, particularly in environments in which the fastener will be subjected to high loads and/or torques. Fasteners according to the invention include a housing, a plurality of nut segments, and an end cap for retaining the nut segments in a specially shaped bore defined in the housing. The bore includes a tapered section and an expansion section; the nut segments are formed, along interior segment surfaces, to be closely engageable to a corresponding section of the reinforcing rod. The nut segments are also shaped, along their exterior surfaces, to be congruent with tapered section of the bore.

Abstract: Anti-rotation lock asembly includes a male threaded member that may be releasably locked in any desired axially adjusted position relative to a mating female threaded member by means of one or more wedge keys that are forced axially into notches in an end face of the female threaded member and radially against flats or keyways on the male threaded member. Surrounding the male member is a key retaining ring which retains the wedge keys on the male member when the wedge keys are disengaged from the female member to permit relative rotation between the male and female members for adjustment of the male member in or out relative to the female member. The wedge keys are retained in radial slots in the retaining ring which prevent relative axial movement between the wedge keys and retaining ring while permitting limited radial movement therebetween.