Abstract: A cutter holder has a holder, a collet, and a nut. The holder has a first threaded portion having an external thread, a first abutting surface, a second abutting surface, at least one recess, and at least one sealing member. The at least one recess is recessed in the second abutting surface. The at least one sealing member is mounted in the at least one recess and partially protrudes from the second abutting surface. The nut has a second threaded portion having an internal thread, a third abutting surface, and a fourth abutting surface. The internal thread and the external thread are corresponding internal and external trapezoidal threads, respectively. The third abutting surface and the first abutting surface have a corresponding diameter with a clearance therebetween being less than 0.015 millimeter. The fourth abutting surface and the at least one sealing member are in an interference fit.

Abstract: A clench wrench includes a structure defining a first body defining a handle and a second body integrated with the first body and defining an engaging head respectively. The second body has two opposite sides with one side defining a front side and the other side defining a back side respectively and includes an engaging space. The engaging space extends through the front and back sides, and an opening is defined on both the front and back sides. One of the front and back sides includes a clenching member of a clenching device connected thereto. The clenching member is selectively movable between a first position blocking the opening of the engaging space adjacent to one of the front and back sides and a second position in which the opening of the engaging space adjacent to one of the front and back sides is not blocked.

Abstract: A medical instrument has a distal end area on which jaw parts are arranged which are movable relative to one another and pivotable about an axle pin. Said axle pin is received in an opening in said medical instrument. Said axle pin comprises a head which is non-circular, and the opening has a contour corresponding to the head.

Abstract: An apparatus for bolting down a flange. The flange is operatively associated with a structural interface having an opening. The structural interface may be a toilet. The apparatus comprises a fastener assembly disposed through the flange slot, and the fastener assembly includes: a base configured to engage the flange; a bolt shaft with an inner bore, wherein said bolt shaft is connected to the base, and a fastener selectively attachable to the bolt shaft. The apparatus also includes a cap operatively configured to selectively engage the bolt shaft. A method of attaching a flange to a foundation is also disclosed.

Abstract: A fastener assembly comprises: an insertion-extraction tool comprising a lever with a sleeve passing through one end from a front surface to a back surface and protruding from the back surface, a first ramp that circumscribes about one-half of the sleeve and a second ramp that circumscribes about one-half of the sleeve opposite the first ramp, the first ramp with a ramped surface that faces away from the back surface of the lever and the second ramp with a ramped surface that faces toward the back surface of the lever; and a wedge lock assembly comprising multiple wedges and a captive screw passing there through, the captive screw having a shank that passes through the sleeve of the insertion-extraction tool and a head on the distal end of the shank adjacent to the front surface of the lever of the insertion-extraction tool.

Abstract: A method of securing a composite plastic part to an engine with a bolt or a bolt and washer. The bolt has a head including teeth that are adapted to engage either the part or the washer. The bolt is tightened to cause the teeth to compress the surface of the part to resist rotation that may become loosened as a result of vibration of the engine. The part may be an intake manifold, a cam cover or an oil pan. Locking features, such as teeth, may be provided on the clamping surface of the bolt and on both surfaces of the washer. Alternatively, a knurled or serrated surface may be provided instead of the teeth.

Abstract: A nut holding structure for a solar power junction is disclosed. The nut includes screw-connected base having one end disposed on junction box and other end has a holding assembly and a threaded segment. The nut is screw-coupled with the screw-connected base, in which the outer edge is being convexly disposed with at least one holding hook. The holding hook and the holding assembly mutually prop up and couple the nut, after the nut being is completely screwed on to the threaded segment to prevent the nut from slipping off and thereby improving assembling and increasing the reliability of connection between the nut and the screw-connected base.

Abstract: A lock ring for securing a threaded stud to a first member, the ring having a first surface defining the ring on the side facing a first axis of symmetry of the ring, and in which a toothed impression is formed when it is forced onto a toothed portion of the threaded stud; and a conical second surface defining the ring on the opposite side to the first axis, and which is forced inside the first member.

Abstract: An escutcheon locking ring for an automatic sprinkler head having an externally threaded section with a top portion having an engaging member extending therefrom comprises a ring having a plurality of tabs extending from the inner perimeter, and an outer perimeter having a plurality of escutcheon engaging fingers depending therefrom. The escutcheon engaging fingers are curved and are formed with sharp ends. When positioned between the bottom surface of the engaging member and the escutcheon, the sharp ends of the depending escutcheon engaging fingers penetrate the surface of the escutcheon. An attempt to unscrew the escutcheon from the sprinkler head causes the rotation of the ring until frictional contact is made between the extending tabs and the engaging member. Once frictional contact is achieved, a positive lock is formed preventing one from unscrewing the escutcheon from the sprinkler head. In an alternative embodiment, the extending tabs are replaced by extending U-shaped members.

Abstract: A locking threaded fastener of the wedge-action type is disclosed with threaded and threadless nut members with wedge elements therebetween for wedging the nut members apart when the threaded nut member is turned in the loosening direction. In a two-piece nut, the threadless nut member has a flat inner surface for engaging the workpiece and the wedge elements have engaging surfaces with a coefficient of friction therebetween which is less than that between the flat inner surface and the workpiece surface. In a three-piece nut, a third nut member, in the form of a washer, is provided with a flat inner surface for engaging the workpiece. The wedge elements have engaging surfaces with a coefficient of friction less than that between the third nut member and the threadless nut member which, in turn, is less than that between the third nut member in the workpiece.

Abstract: A locking threaded fastener of the wedge-action type is disclosed with threaded and threadless nut members with wedge elements therebetween for wedging the nut members apart when the threaded nut member is turned in the loosening direction. In a two-piece nut, the threadless nut member has a flat inner surface for engaging the workpiece and the wedge elements have engaging surfaces with a coefficient of friction therebetween which is less than that between the flat inner surface and the workpiece surface. In a three-piece nut, a third nut member, in the form of a washer, is provided with a flat inner surface for engaging the workpiece. The wedge elements have engaging surfaces with a coefficient of friction less than that between the third nut member and the threadless nut member which, in turn, is less than that between the third nut member in the workpiece.

Abstract: A locking fastener assembly in which coacting cam surfaces are employed to generate wedging forces in response to backing off movement of the associated nut or washer at the conclusion of the normal tightening operation, thereby urging the nut into tighter engagement with the associated bolt and at the same time removing and reversing the residual wind up in the bolt created in the normal tightening operation. Coacting locking means are provided on the confronting faces of the elements of the fastener which operate to lock up the elements following the backing off movement so as to lock in the additional tightening generated by the backing off movement.

Abstract: A lock washer, a locking fastener assembly, and a method of providing a secure, inexpensive fastener joint. The lock washer has a convexly conical upper surface including circumferentially spaced cam surfaces separated by radial shoulders and a concavely conical undersurface. The washer is hardened relative to the associated nut so that as the washer and a nut are tightened together the upper face of the washer acts as a die which presses into the underface of the nut to form a mirror mating image of the conical upper surface of the washer on the underface of the nut. The fully torqued nut and washer define coacting ramp surfaces on the underface of the nut and the upper face of the washer which act upon any tendency of the nut to move in a loosening direction to increase the overall height of the nut and the washer so as to further tighten the joint. The washer is hardened to ensure that the surface of the washer cuts as a die into the lower surface of the nut.

Abstract: A shock and vibration-proof fastener of general application and particularly suitable to hold dual wheels demountably assembled to a cargo vehicle hub. The fastener is designed to isolate the threads thereof from radial and torsion stresses utilizing a split collet encircling the shank of the fastener with its periphery converging toward the collet ends at angles of the order of 4 to 1 relative to the collet axis and having a nesting interference fit with a similarly tapered bore through the parts or wheels to be clamped together. The fastener shank has a threaded well in one end mateable with a cap screw having a self-aligning conical surface on the underside of its head engaging the rim edge of a loose fitting washer. The self-aligning surfaces are preferably provided with a ring of teeth and notches interengaging along helical surfaces having a pitch substantially greater than that of the fastener threads.