Abstract: A double nut is provided in which a flange nut and an insert nut are coupled. The flange nut has a longitudinal axis and has, in an end region facing the insert nut, a stop surface and a wall surface. The insert nut has a longitudinal axis and has at least one snap element in an end region facing the flange nut. The stop surface extends over the at least one snap element radially in the direction of the longitudinal axis of the flange nut. The flange nut has a guide surface in the end region facing the insert nut which is disposed closer to the longitudinal axis of the flange nut than the wall surface.

Abstract: A bolted fastener for joining components, such as a bracket fastened to a crosspiece, includes a bolt, a nut and an eccentric. A square neck of a bolt fits into an oblong hole in a component and prevents the bolt from turning. The diameter of the eccentric that serves as a wedging means fits into the slightly larger diameter of the receptacle hole, allowing the eccentric to fit into the receptacle hole. When the nut is screwed on the bolt, the eccentric rotates about the bolt and, on account of its eccentricity, wedges itself within the receptacle hole. The wedged eccentric prevents accidental loosening or accidental unscrewing of the nut.

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: An anti-loosening nut assembly is composed of an upper nut 3 and a lower nut 2 that engage with each other in an eccentric manner to afford the so-called ‘wedging’ effect of surely inhibiting them from loosening themselves. The upper nut 3 has one or more lateral lugs to be brought into contact with the lower end of a fastening tool such as a spanner. The lug or lugs 3b protrudes or protrude from the outer peripheral portion or portions of the upper nut 3 for the purpose of visual detection of rotation angle of this nut.

Abstract: An adjustable hinge assembly is comprised of a track to which is secured a slide member. A sash arm is secured at one end to the slide member and all along to a horizontal rail of a hinged window sash. A support arm is pivotally connected to the sash arm at one end thereof and pivotally connected to an adjustable connector at the other end. The improvement resides in the construction of the adjustable connector which is comprised of a stationary connecting post extending from a concentric circular disc and about which is positioned an adjustable nut. The nut is connected to the free end of the support arm and the top portion of the post is secured to the support arm by a sliding clip which is easily engaged and disengaged. Both the adjustable nut and the post are constructed from brass making them self-lubricating. The nut is also positioned in tight fit over the post whereby, when the nut is rotated to a desired position to adjust the position of the support arm, it will maintain the said position.

Abstract: A fuel pump is composed of a permanent-magnet motor section and a pump section. The yoke of the motor section is designed as a part of the magnetic circuit which is saturated with magnetic flux. The quantity of the discharged fuel is adjusted by covering from outside an auxiliary yoke which is changeable according to a difference between the actual quantity of the discharged fuel and a required quantity of the fuel.

Abstract: A locking fastener (14) includes a threaded bolt (16) and a nut assembly (26) comprising a torque nut (28) and a lock nut (30). The lock nut (30) is threadably received on the bolt (16) and is shiftable to a locked condition in which the lock nut thread axis (76) is misaligned relative to the bolt thread axis (24) so as to restrict rotation of the lock nut (30) relative to the bolt (16). Such misalignment is achieved by cam surfaces (48,72) defined on the torque nut (28) and the lock nut (30), wherein the cam surfaces (48,72) cooperatively shift the lock nut (30) to the locked condition when the nuts (28,30) are moved relative to one another.

Abstract: A torque nut or screw that allows the nut to be tightened to a preset maximum torque, but prevents excess tightening. The nut or screw includes inner and outer threaded elements that extend along the same axis. The outer threaded element is tapered with respect to the axis. The fastener includes an inner fastening member (7) having fastening threads (8) and an outer female member (10) that is rotatable by means of a spanner, a pair of pliers, a screw driver, or other tool. The female member is connected to the inner fastening member by a coupling (13) having a sufficient strength to transfer to the inner fastening member a torque of a magnitude for which the fastening device is designed. The outer female member (10) is designed to be released upon tightening of the coupling and rotated relative to the inner fastening member (7), but not until the predetermined torque is exceeded. The coupling between the outer female (10) and the inner fastening member (7) includes a conical screw coupling.

Abstract: This invention is a cam actuator means with connector assembly with one embodiment being a stud extractor and wrench apparatus operable to utilize a cam insert member mounted within an outer housing member being engagable with a damaged bolt head on a stud member using a cam actuator clamping action to grasp same for inserting and removing. A second embodiment is a main brake lock apparatus having a brake insert member mounted within an outer brake housing member being engagable with a rotating shaft to achieve a braking or clutching action therewith through a cam actuator clamping action. The brake actuator assembly uses a piston and cylinder actuator assembly selectively operable through fluid control means to contact and engage the shaft for the braking or clutching action. A third embodiment is a bolt and elliptical lock nut apparatus having an inner lock cam insert member mounted within a main lock nut assembly.

Abstract: A double nut comprising a locking nut body having a threaded axial bore, the locking nut body being formed with a recess defined by an annular internal surface and arranged in communication with the axial bore, a tightening nut body having a threaded axial bore coaxial with and corresponding in diameter to the axial bore of the locking nut body, the tightening nut body being formed with an annular axial projection insertable into the recess and having an external surface, at least one of the internal and external surfaces being conical with a diameter decreasing gradually in a direction of insertion of the axial projection into the recess, one of the recess and the axial projection being eccentric with both of the axial bores, and a connecting web adapted to break at a predetermined circumferential shearing force and extending radially to connect the external surface to the internal surface.