Abstract: A special kind of fastening device is disclosed. The fastening device of the present invention comprises several divided washer sections and a guide wire which are to be used in conjuction with a blind rivet or a bolt. This fastening device is used in order to place the washer on the back of a wall for fastening a bolt, etc., in the case where the said back of the wall is inaccessible in usual manner. Generally the divided washer sections are of the shape of a parallel-elliptical form or a parallelogram, and therefore, they can be passed easily through a small hole. After passing through the small hole, they can be assembled into a form of a nut, if the guide wire is pulled forward which is connecting through all the divided washer sections.

Abstract: A system for mounting vehicle wheels is disclosed in which at least one lock nut secures the wheel upon lug bolts to prevent theft. The dimensions of the lock nut are selected such that a lock nut tool may also tighten and remove polygonal nuts that are used to secure the same wheel to the lug bolts. With this invention, a vehicle owner or a vehicle assembly line is not required to have two distinct type of tools, and the assembly line is not constrained to having the lock nut tightened at a particular lock nut tightening station.

Abstract: A fire hydrant cap and actuating tool for use therewith provide enhanced security for fire hydrants and increased safety when using the tool. The cap is forged of 8620 carbon steel; is provided with an internal steel lock washer of cadmium plate steel, and includes thereon a forged, external slip ring of 8620 carbon steel with lubrication between the slip ring and cap. The tool which is used in combination with the cap includes a gripper which fits under the slip ring to prevent the tool from slipping, a spanner wrench and a hexagonal socket with a screw for gripping rounded-off valve stems.

Abstract: A barrel nut retention apparatus for retaining a barrel nut within a cylindrical bore in a panel comprising a barrel nut and retaining means. The barrel nut is comprised of a threaded bore having a longitudinal axis, and a partially cylindrical base portion having opposed first and second shoulders on the outer extremity thereof. The opposed shoulders project away from the threaded bore. Furthermore, the retaining means is comprised of a resilient member having a first portion and a second portion being positioned on opposite sides of the threaded bore and being seated on the opposed shoulders in a plane generally perpendicular to the longitudinal axis. A part of the first portion and a part of the second portion are adapted to engage the panel when the apparatus is installed within the cylindrical bore. Additionally, the resilient member has a third portion disposed between the first and second portions and integrally connecting the first and second portions.

Abstract: A device suitable for use in firmly fixing one member (10), to another member (12) in a relatively adjustable position, comprising a retaining part (2) fixable to said one member and a retained part (4) in use retained by, yet movable relative to, said retaining part, the retained part being adapted to be secured to the other member and to become substantially immovable relative to the retaining part when said securement is tightened, characterized in that the retained and retaining parts are formed as one piece but are breakable apart (6) to permit said relative movement.

Abstract: A controlled-torque fastener limits the torque which may be applied to it for the delivery (screwing-in) of the fastener into a threaded bore of a workpiece or the like. The fastener has a threaded shaft and a tool seat which is configured to be engaged by a driving tool such as a conventional wrench. The tool seat is movable between a driving position in which the tool seat is in driving engagement with the shaft and a non-driving position in which the tool seat effectively disengages the driving tool from driving engagement with the shaft. Resilient biasing means urge the tool seat into the driving position, and driving torque applied to the tool seat urges the tool seat against the biasing force towards the non-driving position. When the driving torque applied to the tool seat exceeds a pre-selected maximum torque, the biasing force is overcome, thereby disengaging the driving tool from effective driving engagement with the shaft, and discontinuing delivery of the fastener.

Abstract: A lock nut with a nut and an annular flat plate made of resilient material, the annular flat plate having a circumferential periphery and an arcuate protrusion, wherein the circumferential periphery is secured on one surface of the nut, and the arcuate protrusion is extended inwardly from an inner circumference of the circumferential periphery integrally over one-half or more of the inner circumference so as to contact the threaded surface of a male thread onto which the nut is screwed.

Abstract: A laminated nut comprising a plurality of conical spring disc washers and a cage for receiving and holding the disc washers in a stacked, aligned relationship to define a central opening threaded to be matably received upon an associated threaded bolt, including protrusion means extending radially, outwardly from the cage to inhibit gripping of the nut by a wrenching tool at one axial end whereby the nut will only be threaded onto the bolt by the wrenching tool beginning with the opposite end of said nut.

Abstract: In order to fix an equipment (12) to a support (10), such as a support onboard an aircraft, use is made of a locking bolt (16) having a threaded rod (24) articulated by a yoke (18) to support (10) and on which is screwed a manipulating nut (26). A bearing part (28), immobilized in rotation on threaded rod (24), is connected with a certain axial clearance to nut (26) and has on its front face a cup-shaped recess (34) able to cover a lug (14) fixed to the equipment (12). Springs (38) placed in slots (39) of nut (26) permanently apply rods (40) to the rear face of part (28) on which are formed indentations (42).

Abstract: A split nut is made of elastic material that deflects under manual pressure. Each nut half has a projecting bead and a keyhole recess. The beads removably fit into the keyhole recesses to hold the nut halves together. Radial fins permit rotation by air jet and enlarge the size of the nut halves to make manual disassembly easier.

Abstract: A flanged nut is received by a cup washer which is slightly larger than the flanged nut to allow rotation of the nut relative to the washer. The cup washer is deformed (staked) to capture the nut about its flanged periphery. The nut is designed to rotate relative to the washer during assembly to assure two known, constant bearing surfaces regardless of the nature of the panel surface beneath the washer. The flanged nut has a large nut-to-washer bearing area capable of optimizing stress distribution at high loads.

Abstract: A manually manipulatable nut and bolt fastener for a battery terminal clamp provides an nut configured to engage one of the fingers of a typical bifurcated battery terminal clamp and a bolt engaging the other finger to move the fingers relatively responsive to nut-bolt motion. The nut-bolt combination is formed of flexibly resilient polymeric material to deform to accommodate axial and lateral repositioning and alignment of the bolt as the battery clamp fingers move relatively to each other. The fastener eliminates normal corrosion associated with metallic fasteners for battery terminal clamps.

Abstract: An extended counterbore nut has a nut body and an attached collar extending from counterbore in the nut body. The bore of the collar is about equal in diameter to the major diameter of the thread of the bolt used with the nut so that the collar aligns the bolt and nut for threading. At a predetrmined axial load, the collar releases from the nut body and enters the counterbore, shortening the nut.

Abstract: The invention relates to a nut with a pressure ring in which the pressure ng is provided with a spherically shaped underside for engagement with a depression complementary thereto in a component to be secured. In order to permit a simple and secure mounting of the nut with the pressure ring and to guarantee a clearly reproducible holddown force, the pressure ring (12) is formed as a closed ring and means (18, 19), such as for example a peripheral rim and a circumferential flange, are provided for connecting the nut (10) with the pressure ring (12) which prevents a separation and loss. Thereby the nut and ring are rotatable relative to one another about a nut axis (1) and are shiftable relative to one another transversely of the nut axis (1). The peripheral rim (18) for connecting the nut (10) and the pressure ring (12) is so arranged on the first of these two elements that it engages in overlapping relationship the circumferential flange (19) on the second element (12) with radial and axial freeplay.

Abstract: The adaptor comprises a nut (2) screwed onto the end of the connection element (1) and interacting with a two-way connector (4) adapted to ensure the connection between a screwing or unscrewing member and the connection element (1), an arrangement between the nut (2) and the connector (4) allowing the connector (4) to rotate in only one direction, and a spring insert (44) for the elastic support of the connector (4) on the end of the connection element (1).

Abstract: The pin type disc brake in which a guide pin is inserted from a boss hole of a second extension arm of a caliper to a boss hole of a first extension arm thereof, the guide pin has a threaded end to which a nut is screwed, a member for preventing the guide pin from moving along the axis of the disc is fitted in a recessed portion formed on the first extension arm of the caliper, and a member for preventing the guide pin from rotating is abutted against a flat surface of an abutment portion formed on the first extension arm of the caliper.

Abstract: A rod-shaped tension member formed of fiber reinforced composite material is utilized as an anchoring rod in foundation and mining construction, or as a reinforcing member in concrete and prestressed concrete construction. At least, in an axially extending region where it is to receive an anchoring member, such as a rod, the tension member has a continuous helical thread formed of alternating ribs and recesses. The anchoring member has a corresponding thread so that it can be screwed onto the tension member thread. An intermediate layer is provided between the threaded regions of the tension member and the anchoring nut, and is formed of a material affording large plastic deformation relative to the tension member when slight stress increases occur at overload conditions.

Abstract: A clamping fixture for axially clamping a tool, on a flange of a driven spindle and comprising a clamping nut having an internal thread to be screwed on an end portion with an outer thread of the driven spindle, a clamping member arranged between the tool and the clamping nut for transmitting an axial clamping force to the tool upon tightening of the clamping nut, a manually operable adjustable member freely rotatable relative to the end portion of the driven spindle, and a gearing for gear-coupling the adjusting member to the clamping nut and gear-coupling the clamping nut to the clamping member.

Abstract: A clamp device for clamping a disc tool to a driven spindle and comprising a clamp nut, a clamp disc, and an arrangement for connecting the clamp disc to the clamp nut and which arrangement includes a ring having an inner track in which a plurality of rolling members are displaceable and are spring biased against respective stops projecting from at least one of the clamp nut and the clamp disc, and which is rotatable against a spring force to release the clamp disc from the clamp nut.

Abstract: A laminated nut comprising a plurality of conical spring discs or spring washers and a cage for receiving and holding the spring discs in a stacked, aligned relationship to define a central opening threaded to the matably received upon an associated threaded bolt, with the cage comprising a plurality of fingers nested within slots defined in the flats of the spring discs and including protrusion means at one axial end of the nut cage to preclude gripping of the nut by a wrenching tool at the one axial end and including a method of manufacturing the laminated nut.

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 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.

Abstract: A vibrating portable screed of the type made up of sections having screed blade means at the base and a ridge portion at the top employs a turnbuckle assembly in the ridge portion held together by a removable pin and other removable pin connected means in the base portion thereby enabling the sections to be quickly assembled and disassembled by installing and removing the pins.

Abstract: A nut and stud assembly for securing workpieces via threaded engagement of the stud with one of the workpieces and engagement of the nut with another of the workpieces and with the nut preassembled on the stud with the stud having a stop preventing the nut from advancing further on the stud until the stud has reached a preselected position in the one workpiece whereby the nut and stud assembly will function similarly to a headed bolt until the preselected position is attained and thereafter the stop will permit movement of the nut on the stud through such stop and be free running to function similarly to a separate nut and stud combination to a final clamp up of the workpieces.

Abstract: The devices are floating engageable means which may be a floating nut or a floating driver for use in hostile environment, such as space. The device includes a housing with a cross-shaped opening, each arm of the cross receiving a wing of a floating member. A spring between the base of the housing and the back of the floating member urges the wings against the top surface of the arms of the cross-shaped opening in the housing. The cross-shaped openings may have a rectangular configuration with a thread surface forming the top surface of the opening. This permits the floating member to maintain a lateral offset. Alternatively, the arms may have a triangular outline with the vertex forming the top surface of the arms. With this configuration, a force will be provided to center the floating member in the housing. The floating member terminates in a an outwardly facing taper guiding surface which tapers to the engaging means of the floating member. With this arrangement, off axis and off angle mating is possible.

Abstract: A fastener and tightening device for exerting force and equalization of force upon the nut or head of a bolt or threaded stud. The device is comprised of a shank fitting through a support member within an abutment head adapted to be drawn up tight against the support member. A plurality of jack bolts are threadedly engageable with holes in the head and are adapted to be tightened to exert pressure against the support member. Separate ball members are positioned between the jack bolts and a wear plate on the support member to minimize friction and provide for force equalization to counteract any off center alignment.

Abstract: An anchor nut-cage fixing system is provided for positioning on a metal sheet from one of the faces of this metal sheet with a view to receiving bolts presented from this same face and comprising: a nut (1) with wings adapted for cooperating with an elongate hole (3) formed in the metal sheet (4); a plastic material cage (5) split by windows (6) and connected to an external collar (7). This collar is covered by a flat metal cap (9) perforated so as to let the bolts pass therethrough and having axially bent flanges (12) whose axial height is equal to or slightly less than the thickness of the collar, one at least of these flanges being bent to a little more than 90.degree. so as to imprison the collar.

Abstract: A two-part front mounted receptacle for a quick-release fastener is disclosed. The receptacle has a body part (10) having a first, substantially planar, front element (11) with an aperture (13) therethrough, and a pair of leg elements (14,18) depending from the ends of the front element (11). A first one (14) of the leg elements has a sprung barb or barbs (15) in use engaging the rear face of the support (30) in which the receptacle is mounted. The receptacle also has a substantially U-shaped spring retainer (20), one side (21) of which is arranged to be engaged and held to each of the legs of the body part and which projects beyond the end of the body part remote from the first leg (14), and the second side (22) of which has a retention mechanism (27,28) for engaging and retaining in use a stud (2) connected therewith.

Abstract: Provided is a double locknut assembly composed of a first nut and a second nut for fastening the first nut onto a bolt, wherein the above-mentioned first nut is formed therein with a bolt hole formed therein with a female screw thread threaded to engage with the screw thread of the bolt, the first nut having a projecting part, the outer peripheral surface of the projecting part having a truncated-conical surface on which a male screw thread is formed, the first nut being formed therein a slit so that the first nut is diametrically contractible, and the second nut is formed in the center section thereof with a bore having a truncated-conical surface formed therein with a female screw thread threaded to engage with the male screw thread on the outer peripheral surface of the projecting part of the first nut, thereby after the second nut is engaged with the first nut to a slight degree to form a one body unit, the first nut is engaged with a bolt, and thereafter the second nut is tightened to cause the first nut

Abstract: Locking fastener comprising a threaded part such as a bolt or nut and a lock plate which fits over the bolt or nut and is prevented from rotation by engagement with a stationary object such as a protrusion on the part to be secured. The lock plate has an opening with a contour which mates with the outer contour of the threaded part to prevent rotation of the threaded part, and the plate is retained on the threaded part by a retainer received in a detent opening or groove formed in the threaded part. In some embodiments, the retainer is a separate part which is free to rotate in the groove. In other embodiments, the retainer comprises a detent lug carried by the lock plate.

Abstract: A nut and washer assembly comprising a nut structure and a washer member with the nut structure including a nut member and a cage gripping the nut member and having resilient tabs permitting insertion of the tabs into a washer bore with the tabs having protrusions for engaging a surface on the washer bore whereby the nut structure and washer member are held together as an assembly with the nut member being free spinning relative to the washer member.

Abstract: A locknut including an annular locknut body having a threaded inner surface and an outer surface, a locknut shroud rotatably mounted on the locknut body and having an inner surface facing the outer surface of the locknut body, an annular ridge on the outer surface of the locknut body defining a first shoulder, a second shoulder within the annular shroud, an O-ring mounted on an inclined surface of the locknut body and bearing against an inclined surface on the annular shroud to force the first and second shoulders into abutting engagement, an annular space between the inner surface of the annular shroud and the outer surface of the locknut body, and a plurality of lobes on the outer surface of the locknut body and located in the annular space for receiving a mating key.

Abstract: In order to be able to use an anti-skid device, particularly for vehicle wheels with pneumatic tires when driven on ice and snow, having a fixing disk, which can be attached to the wheel rim and which remains thereon even when the anti-skid device is not in use, and a supporting disk attachable to the fixing disk by a retaining ring and having a plurality of anti-skid arms engaging over the tire tread without great technical expenditure on a large number of vehicles, whose rims have different hole circles and pitches for the rim screws, the fixing disk with a shaped-on hub carries on its side remote from the supporting disk an adaptor disk, which is connected to the fixing disk by screw connections and which has a plurality of radially directed elongated holes in identical and/or several spacings or pitches.

Abstract: A wheel lock apparatus is set forth wherein a wheel mount threadedly attaches to an existing axle bolt for securement of a conventional automotive wheel thereto. A reciprocating butterfly latch is mounted within diametrically spaced slots of the wheel mount and is positionable from a retracted position to an extended position by means of an overlying coaxial lock bolt mounted within a positioning cylinder, whereupon positioning of the butterfly latch to the extended orientation enables selective latching of a main hexagonal body containing the positioning cylinder and lock bolt. Upon latching of the main hexagonal body, the wheel mount may be secured or withdrawn from the associated threaded axle mounting member.

Abstract: The jack (V) comprises a tubular primary screw (10) movable in rotation and translation and provided with an outer screw thread (10a) and an inner screw thread (10b) which have opposite thread hands, a fixed secondary screw (11) engaged in the inner screw thread (10b), a nut (9) connected to the movable element and engaged with the outer screw thread (10a) of the primary screw (10). The nut (9) is composite and comprises a first nut (9a) composed of a plastics material having a good coefficient of friction and a second nut (9b) composed of a mechanically strong material. Axial forces of normal amplitude are absorbed by the plastics nut (9a), while the exceptional overloads, resulting for example from an impact on the front of a vehicle whose seat structure is provided with the jack of the invention, are absorbed by the second nut (9b). In normal operation, the friction between the plastics nut (9a) and the screw (10) are considerably reduced, which provides a jack having an excellent efficiency.

Abstract: A nut assembly comprises two end-to-end nuts threaded onto a screw and coupled by splines which prevent relative rotation between the nuts while permitting relative axial movement. A sleeve surrounds the nuts and is threaded onto one of the nuts. The other nut is formed with ratchet teeth adapted to fit into angularly spaced notches in the sleeve. When the sleeve is rotated relative to the nuts, it forces the nuts away from one another to take up backlash between the nuts and the screw. During such rotation, the teeth ratchet into and out of successive notches and ultimately prevent relative rotation between the sleeve and the nuts during normal service use.

Abstract: A lug nut device is provided to enable an adjustable, durable and lockable connection between a wheel and an axle of a vehicle. The lug nut device includes two components, a lug nut composed of hardened metal and a tapered washer composed of aluminum. The lug nut is comprised of a plurality of arbitrarily arranged rounded and flat sides. The tapered washer has a large surface area, allowing for self-centering and weight distribution. The tapered washer and lug nut are connected by press-fitting the base of the lug nut to the flat end of the tapered washer. The two components then are fixedly engaged to a bolt, adjustably connecting the wheel to the axle. The lug nut device is more securely fastened by the means of a socket or key whose interior cavity circumference is complimentary to the sides of the lug nut.

Abstract: A tamper proof fastening device includes a threaded portion, a tool engageable portion for engagement by a tool for rotation of the device and drive coupling means coupling the engageable portion and the threaded portion for transmission of rotation from the engageable portion to the threaded portion. The drive coupling means is frangible upon application of a torque in excess of a predetermined torque to the engageable portion. After fracture, the engageable portion is rotatable on the threaded portion without application of substantial torque thereto. The engageable portion includes a generally cylindrical bore and an annular inwardly directed flange at one end of the bore. The threaded portion is provided with an abutment adapted to engage with the flange to restrict against axial separation of the threaded portion and the engageable portion in a direction.

Abstract: A fastener (10) is disclosed for fastening a truck bed liner (58) to the side walls (50) of a truck bed. The side walls (50) are bounded at the top edge by a top rail (52) extending inwardly from each side wall (50) and a side rail extending downwardly from the inner margin (56) of the top rail (52). The fastener (10) is designed to be used for a truck bed liner (58) having a flange (62) that fits over the top of the top rail (52). The fastener (10) has a body (12), clip (18), screw (14), and washer (16). In the use of the fastener (10), the truck bed liner (58) is loosely positioned against the side wall (50). The screw (14) is inserted through a hole (63) in the liner (58), with the washer (16) being behind the head (64) of the screw (14). The clip (18) slides over a hole (30) of the body (12), and the screw (14) is threaded through the body (12) and clip (18).

Abstract: A fastening apparatus is provided wherein the length of a mating threaded connection between two members is limited as a function of an effective differential pitch to the uniform pitch of the threads on both members whereby clearances of progressive increasing amounts are established between successive opposed tooth flanks. An elastic deformation of one member occurring in a direction opposite to the increasing of the amounts of clearance brings successive opposed flank portions into a force transmitting relationship whereby the total area of flank-to-flank contact between the threads varies as a function of the applied load.

Abstract: A ball screw comprising a screw stem having on its outer periphery a helical rolling groove and a nut having on its inner periphery a helical rolling groove, and a deflector mounted on the nut and having ball returning grooves for returning a ball rolling between the rolling grooves in the screw stem and nut to between the original rolling grooves, thereby forming endless circulating passageways. The nut has a fitting groove open to at least one of both the open ends of the nut and is formed narrowing form its bottom toward its radial open end. Fitted into the fitting groove is a deflector having ball returning grooves corresponding in number to the endless circulating passageways to be formed. The deflector can be fixed accurately and firmly using axial fixing means fixed to an open end of the nut.

Abstract: A threaded connection in which the axial load between a screw and nut in a tightened condition of the connection is distributed more uniformly between different turns of the engaged threads than in a standard threaded connection by forming one of the threaded elements, preferably the nut, to have a pitch which increases progressively as the thread advances helically in a predetermined axial direction, while the other thread desirably has a pitch which is uniform along its length. The pitch of the first thread may increase at a rate predetermined to compensate for differences in the tensile force which is applied to the screw and the compressive force applied to the nut at different points along their length when the screw and nut are tightened together to a prestressed condition.

Abstract: There is disclosed a torque limiting fastener system for forged or pressed metal nuts. The stamped metal fasteners have a central, cylindrical sleeve, an annular ledge which is dependent from one end of the sleeve, and a surrounding skirt, generally with hexagonal flats, which forms an annular well about the cylindrical sleeve. The torque limiting characteristic is imparted to these fasteners by a drive member which is of approximately the same dimensions as the stamped or pressed metal fastener and which has a plurality of prongs which are received in apertures or recesses in the stamped fastener. The apertures can open into the annular well about the central sleeve of the fastener or can be placed in an annular flat base which is formed on some of the stamped metal fasteners. The drive member is formed of a suitable plastic material having a precisely controlled shear strength.

Abstract: An improved wheel nut for securing a wheel to a vehicle hub or the like and for retaining a wheel cover on the wheel. The wheel nut preferably includes a nut body and a cap secured to the nut body and an axial gap is provided between the end of the cap and a portion of the nut body. A retaining ring is provided in the axial gap and the retaining ring extends radially outwardly beyond the wheel nut for retaining a wheel cover against the wheel and for precluding removal of the wheel cover unless the wheel nut is first removed.

Abstract: A method and apparatus for compressing a stator core assembly of an electric generator having a plurality of stacked punchings positioned between opposing compression plates. A through-bolt is passed through an aperture drilled through the stacked punchings, and a tensioning nut threaded onto one end of the through-bolt. A thrust nut is threaded onto a second end of the through-bolt, thereby compressing the punchings between the tensioning nut and a thrust nut. The tensioning nut is fixed to the through-bolt so as not to be removable. The punchings are compressed by external means and then the thrust nut is tightened against the plate and peened to remain in position. Final tensioning and retensioning is provided by a plurality of set screws circumferentially placed about the thrust nut and extending parallel to the through-bolt. The set screws may be turned, cooperating against one of the compression plates to exert compressive force on the punchings.

Abstract: A fatigue resistant threaded connection includes a nut having two threads which are aligned axially but turned relative to one another about their common axis through an angle great enough to cause development of large axial forces between the screw and nut threads when they are connected together, resulting in improved distribution of load forces between the two threads of the nut and improved resistance of the screw and nut to fatigue and tensile failures.

Abstract: A self-driven nut having a relatively rotatable nut portion and anchor portion which are threadedly joined together. A spring rotatably biases them for relative rotation in one sense. A latch is provided to hold them against rotation with the spring compressed to store energy. Release of the latch enables the spring to drive the portions and torque down the nut.

Abstract: A quick acting threaded fastener assembly using two identical half nuts with alternating internal threaded and grooved portions which are either threadedly engaged or slidably aligned with a threaded rod which has corresponding alternating external threaded and landed portions. The screw and nut combination provides quick release and tightening features which facilitate opening and closing clamping jaws or pads on vises, clamps, adjustable wrenches and other devices otherwise requiring many turns of long screws.

Abstract: A fastening assembly comprises a first internally open member such as a collar, and a second internally open member such as a bifurcated plug which is slidable realative to the collar to an assembled position in which the plug is located at least partially within the collar, at least one protrusion provided between the collar and the plug causing the plug to be deformed when in said assembled position, so as to create at least one inwardly directed jaw or fang for use in fastening engagement with a workpiece such as an externally threaded stud located at least partially within the plug, the advantage being that the amount of driving force which is transmitted in the driving direction to the stud through means of the fastening assembly can be minimized, so that the fastening assembly can have a knock-on/screw-off capability even if the stud is resiliently mounted on compressible foamed material.

Abstract: A plurality of jack bolts are threadedly engaged with openings in a flange on a fastener to stress a shank part of the fastener. The flange can be a collar retained on a shaft by a retainer, a nut on a threaded end of a bolt or the head portion of a bolt. The jack bolts can be arranged in a flange on an end of the tension rod to stress arbors against opposite sides of a roll sleeve to form a roll assembly for use in a rolling mill.