Abstract: A pipe connection that includes two tubular connection pieces for a conical clamping connection, the connection pieces being screwed together by a union nut while one connection piece is plugged inside the other. Each connection piece has a conical sealing surface which sealingly rests against the other, and an annular groove is provided in one of the sealing surfaces. The union nut is slit on the collar side.

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 threaded locking beam nut having a plurality of locking beams configured such that the inside edge surface of each locking beam has a radially inwardly angled surface thereby forming substantially a V-shaped channel between adjacent beams.

Abstract: The invention relates to the production of a nut which comprises a drive area (2) and a clamping area (3). A bore hole (B) running through the clamping area (3) and the drive area (2) is produced in a cylindrical manner. A screw tap (15) is screwed into the cylindrical bore hole (B) until a predetermined position is reached. Said screw tap is successively provided with the following, when seen in an axial direction from the front side thereof: a centering/cutting section (17), an adjoining cutting section (19) which is used to produce a conical internal screw thread section (8) in the clamping area (3), and a cutting section (21) which is used to produce a cylindrical internal screw thread section (7) in the drive area (2).

Abstract: It is an object of the invention to provide a structure of an internal thread portion for preventing looseness which structure allows a reduction in the torque required for the threaded engagement with an external-thread member and prevents a seizure.

Abstract: A nut free from inadvertent loosening has an annular lug with a plurality of generally upright grooves formed in an outer peripheral surface of the annular lug at angular intervals so as to divide the annular lug into a plurality of wall segments. Each wall segment is interposed between two upright grooves. At least one of the wall segments is depressed centripetally to reduce its radius, with the other segments remaining undepressed. The annular lug is integral and coaxial with a base which is engageable with a driver. An internally threaded bore is formed through the nut around a central axis thereof. The annular lug provides an upper zone of the internally threaded bore. The internal thread is continuous from end to end and is not intersected by the vertical grooves. The inner radius of each depressed wall segment is less than the inner radius of the undepressed wall segments. The outer radius of each depressed wall segment may be greater than or less than the outer radius of the undepressed wall segments.

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: 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: Insert 16 has four radial slots 26 through shoulder 22 and wall 28. It is press fit within smooth hole 32 in case 10. Internal threads 24 are strained in the locking range 36 where bolt 18 is locked.

Abstract: A locking assembly for fastening two components together, such as a fluid coupling assembly, is disclosed. A first member has a serrated annular surface and fastening threads adjacent a bearing surface. A second member has a flexible projection or projections or a complementary configuration to the serrated annular surface. The second member also includes fastening threads and a bearing surface. When the respective threads engage, they provide the primary preloading force to the bearing surface, while simultaneously the projections and the serrated detects provide a retention force to ensure a positive coupling.

Abstract: In a self-locking nut including a threaded upper collar equipped with longitudinal slots in U-shape defining in collar a plurality of circular arc segments compressed by a helical external spring, the spring is subjected to a hot-galvanizing treatment and is provided in harmonic spring steel if it operates below 250.degree. C., while it is provided in stainless spring steel if it operates above 250.degree. C., and the nut, provided in stainless steel if it operates at high temperatures, is subjected to an electrolytic coppering treatment.

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 threaded locking beam nut 20 in which each of a plurality of beams 22 is configured such that confronting side walls 27 and 28 of adjacent beams diverge outwardly away from each other. Any debris located between that confronting side walls of adjacent beams therefore does not inhibit movement of the beams from a locking, expanding position to a free, inwardly-tapered position.

Abstract: An improved lock nut adapted for repeated use in locking onto a series of bolts, each time compressively gripping the bolt with substantially the same high compressive force. In one embodiment, the locking is achieved by a plurality of resilient locking beams that flex radially outwardly to accommodate the bolt, while in another embodiment, the locking is achieved by a generally oval-shaped sleeve that flexes into a more circular shape when the bolt is threaded into it. In both embodiments, the flexing is made to occur at multiple locations along the beam's (or sleeve's) length by providing a stepped radial thickness, such that the total amount of elastic flexing can be maximized. In another feature of the invention, usable in the embodiment that includes the multiple locking beams, the axial slots separating the beams are defined by beam side walls that diverge from each other by an amount that increases from substantially zero at the bases of the beams to a maximum at the remote tips of the beams.

Abstract: An improved self-locking nut comprising a threaded upper collar provided with longitudinal slots defining in the collar a plurality of circular arc segments compressed by a helical external spring. The slots may widen upwardly in V or U-shape to prevent the segments from contacting one another.

Abstract: A lock nut has locking members with internal thread segments formed between slots, the segment ends being relieved to prevent galling; also, the members are deformed so that thread segments therein extend along generally circular arcs that have axes offset from the nut axis. Typically, the axes associated with the arcs on said members are at the respective sides of the body axis opposite from said respective members.

Abstract: A fastener for releasably securing an object to a panel having a hole therethrough comprises a screw having a screw head attached to the object and having a threaded screw shank insertable through the hole in the panel. The fastener further comprises a flexible resilient plastic push-on/screw-off nut having a bore therethrough which is slidably mountable onto the threaded screw shank into engagement with the panel. The nut has a resilient flexible concave nut head which operates to seal the panel hole and has a nut shank defining two resilient flexible legs, each of which has internal nut threads for engaging the threaded screw shank. The nut also comprises webs, each connected between the nut head and the outer side of a leg, which operate to force the nut threads tightly against the screw thread in locking engagement when the nut head is forced against the panel. The nut is removable from the screw by rotation in a conventional manner.

Abstract: An improved fastener assembly includes an externally threaded member or bolt having a thread convolution with a relatively long trailing flank surface and a relatively short leading flank surface. An internally threaded member or nut also has a thread convolution with a relatively long trailing flank surface and a relatively short leading flank surface. The nut is grooved to provide an expandable section. When the nut and bolt are tightened, the relatively long trailing flank surfaces of the thread convolutions cause the grooved portion of the nut to expand to completely fill a hole. The opposite end of the nut is contracted to clamp against a thread convolution on the bolt. In one embodiment of the invention, a relatively short leading flank surface of the bolt extends at an acute angle to the relatively short leading flank surface of the nut to provide clearance between the internal and external thread convolutions.

Abstract: An anti-backlash nut having one or more longitudinal flexural members with one end fixed and one end free-floating is disclosed which undergoes translational movement along a shaft. This anti-backlash nut is improved by providing ramps at the free-floating ends of the flexural members and means to apply axial forces on the ramps to thereby create radial force vectors which maintain the ramps in contact with the shaft even after the nut has become worn.

Abstract: An anti-backlash nut having one or more longitudinal flexural members with one end fixed and one end free-floating is disclosed which undergoes translational movement along a shaft. This anti-backlash nut is improved by providing ramps at the free-floating ends of the flexural members and means to apply axial forces on the ramps to thereby create radial force vectors which maintain the ramps in contact with the shaft even after the nut has become worn.