Abstract: A hardware component imitating a nut/bolt/washer connection for structural members includes a base portion with a disc-shaped base plate and a cylindrical member including an outer surface in the shape of a hex nut. The disc-shaped base plate extends radially to the cylindrical member and imitates a washer. The disc-shaped base plate includes a first opening having a first diameter and the cylindrical member includes a second opening having a second diameter, where the first and second openings are concentric and said second diameter is larger diameter than said first diameter. The first opening is sized to receive therethrough a shaft of a mounting device, and the second opening is sized to receive therein a head of said mounting device.

Abstract: A breakaway nut includes a threaded section; a hex portion; and a breakaway portion connecting the threaded section and the hex portion, wherein a slot is defined in the hex portion along an axial dimension of the hex portion.

Abstract: A safety shear bolt includes a main bolt portion and a torque head portion connected to the main bolt portion. The torque head portion includes an extended head portion, a stem portion rigidly connecting the main bolt portion to the torque head portion, and a coupling mechanism rotatably connecting the extended head portion to the main bolt portion. The stem portion is configured to shear when a predetermined torque is applied to the extended head portion, while the coupling mechanism prevents the extended head portion from dropping after shearing off from the main bolt portion.

Abstract: A fastener includes a head, a shaft, and a pressure pad. The head has an outer surface for engaging a drive tool. The shaft has an outer surface including a threaded portion. The pressure pad has a breakaway portion with a torque limit connecting the pressure pad to the shaft.

Abstract: A shear component for releasably securing a first component to a second component, the shear component comprising a body having a first end, a second end, an outer wall surface, an inner wall surface defining a cavity, a shear plane, and a core disposed within the cavity and in sliding engagement with the inner wall surface of the body. The core comprises a first position in which the core is disposed in alignment with the shear plane, and a second position in which the core is disposed out of alignment with the shear plane. The shear component can be included in a downhole tool to maintain the downhole tool in the run-in or initial position until being compromised by a stimulus.

Abstract: The anti-theft fastener has a shearing head, a shaft and a fastening element. The shearing head has at least one shearing tab. The shaft is threaded and connected the shearing head. The fastening element is mounted around the shearing head and has an outer surface having a countersink and at least one shearing recess. The countersink is formed in the outer surface around the connecting hole. The at least one shearing recess is formed in countersink, and corresponds to the at least one shearing tab, and each shearing recess has at least one shearing surface, whereby the at least one shearing tab is broken off by the shearing surface of the fastening element.

Abstract: A fastener is disclosed including a threaded male fastener and a shear bushing for coupling thin walled structures together. The shear bushing having an internal through opening and a shear ring constructed to project across an interface of adjacent walls is operable for absorbing shear loads transmitted into the fastener from a fastened structure. The male fastener includes a threaded portion extending through the shear ring for engaging a threaded female receiver.

Abstract: A join structure comprises a box section column and spit T-section joined by a high strength bolt and a method secures a nut to an inside of the box section column. A Torque-Shear type high strength bolt is tightly tightened by a controlled tension and a joining method of a steel member uses that bolt. The join structure is comprised of a box section column, a split T-section attached to its outer surface, and a high strength bolt inserted from the outside of the split T-section and fastened with the nut. The nut is secured to the box section column by joining a sleeve secured to a washer formed integrally with the nut and a sleeve of a nut holding part from the outside of the column. The Torque-Shear type high strength bolt has a pintail for controlling the torque at its top.

Abstract: A screw having a screw-threaded shank and a circular head, the head being provided with three radially extending screwdriver tip receiving portions defined between three first, off central integrally formed projections designed to become shaved-off the screw head by a pre-set force applied during tightening of the screw, and three second, integrally formed projections designed to withstand a shear force greater than the pre-set force applied during slackening of the screw.

Abstract: An improved apparatus for ground support comprising a tensionable reinforcing member including at least one nut threadably receivable by the tensionable reinforcing member. The nut body comprises a squared portion and a convex hemispherical portion. The nut includes a bore adapted for engagement with the first end threaded portion of the tensionable reinforcing member. The nut also at least one second bore transversing the squared portion of the nut square body portion. The second bore is adapted to accept a shearing element capable to fix the nut in a temporary first operating position on the reinforcing member. The shearing element is a rolled member made from carbon steel. The shearing element is adapted to shear at a consistent and predetermined torqueshear.

Abstract: A sealing assembly designed to co-operate with a screw provided with a tightening slot by being mounted therein in such a manner that once said assembly is sealed the tightening slot is hidden in a manner that is not reversible except by destroying the seal, and further comprising a breakable drive suitable when the sealing assembly is subjected to a tightening action, for driving the screw in a tightening direction inside a receptacle provided for this purpose and for breaking once the screw becomes blocked, so as to prevent any loosening action being applied via the breakable drive.

Abstract: An improved drive shaft connecting device, including a novel shear bolt (50) for connecting two ends or flanges (42, 44) of the drive shaft connecting device in a manner whereby the separate parts of the drive shaft connecting device are securely connected to each other and are yet free to disconnect from each other and rotate relative to each other in the case of an overload condition on the drive shaft or drive shaft connecting device. The shear bolt is double ended (i.e. threaded on both ends) and shouldered on both ends. The threads on each end allow the two flanges of the drive shaft coupling device to be pulled together to a pre-determined distance, which, together with a shear point (60), is set by the distance between the opposing shoulders (52) on either side of the shear bolt As well, the flanges of the drive shaft coupling device are designed to accept the shear bolts in slotted openings (46, 48).

Abstract: A torque-limiting bolt-and-nut assembly is provided for actuating a pipe-pressing member in order to secure two pipe ends together. The bolt includes a threaded shank, a secondary drive head, and a shearable drive head designed to be sheared-off by a torque exceeding a predetermined value. A recess is formed between the shearable drive head and the second drive head. The nut is mounted on the shearable drive head and is configured for transmitting torque to the shearable drive head from a manual tool. A nut includes a connection structure extending into the recess for resisting dislodgement of the nut from the bolt. The shearable drive head has at least four sides, all of the sides being of equal length, and the number of the sides being an even number.

Abstract: A rock stabilizing apparatus and method for use with adhesion materials has a tensionable reinforcing member having a threaded portion at one end and an opposite end. The member-threaded portion threadably receives a nut and a bearing plate is retained on the member-threaded portion by the nut. A shearing element is provided for temporarily fixing the nut in a first operating position. At a predetermined torque, the shearing element fails and the nut is freed to advance on the threaded member portion from the first temporary operating position to a second permanent operating position. The first fixed operating position is located at the top end of the member-threaded portion. The second operation position is located at the bottom end of the member-threaded portion so that the bearing plate is in abutting contact with the face of the rock formation. In its first operating position the nut and reinforcing member may be rotated together for mixing the adhesion materials located within the drill hole.

Abstract: A locking device is disclosed for interlocking two members having aligned openings extending therethrough. The device includes a hollow cap and a pin with an enlarged head at one end and a nose at the opposite end. The pin is insertable through the aligned openings of the members, with its nose received in interlocked engagement within the cap, and with the two members captured between the cap and the enlarged head of the pin. A frangible portion of the pin is severable in response to relative rotation between its nose and enlarged head to thereby destructively disassemble the locking device.

Abstract: A tamper-proof, precision, torque limiting nut device is disclosed. The device comprises an inner collar member having a threaded bore to receive a bolt, stud or the like and an outer sleeve member interconnected to the collar by pins or by welds having a shear strength up to a predetermined torque value. The nut can be tightened on a bolt or stud up to the predetermined shear value, above which the pins or welds shear, to achieve tightening of the nut to the desired torque without the use of a torque wrench. Overtorquing and undertorquing are prevented, and tampering with the nut is substantially obviated.

Abstract: A sealing fastener includes a unique identifier device for the individual fastener that enables ultrasonic identification of the device using an ultrasonic fault measuring system, and a frangible element within the fastener integrated with the identifier device that provides an ultrasonic signature indicating an attempt to loosen or remove the fastener when subjected to an ultrasonic signal generated by an ultrasonic fault measuring system. The unique identifier device includes a stack of individual metallic washer elements brazed together, with each washer element including discontinuities or cavities that are randomly arranged with respect to the cavities of the other washers in the stack. The fastener includes relatively movable portions that cause fracture of the frangible element upon any attempt to loosen or remove a fastener after it has been tightened or secured at its sealing location.

Abstract: A nut and bolt assembler comprises a threaded bolt (78a) having a proximal end (140) with a knurled outer surface (142). A nut (144) is press fit onto the bolt knurled proximal end (190) to prevent rotation of the nut (144) with respect to the bolt (78a). Preferably, the knurled outer surface preferably comprises axial splines (142). The connection is most useful on the proximal end of a caging bolt (78a) in a spring brake actuator (10) having a hollow actuator rod (60) into which a head (86) at a distal end of the caging bolt (78a) is positioned with the proximal end (140) of the caging bolt (78a) extending out of the brake actuator through a threaded aperture (77) in an end portion of a brake actuator housing (52). A washer (148) can be provided between the nut (144) and the brake actuator housing (52) to prevent foreign material from entering the break actuator housing (52) through the threaded aperture (77).

Abstract: Embodiments of a log bunk shear-pin system are shown and described, each embodiment including a shear-pin that engages a log bunk and prevents the bunk from swiveling when the truck is being loaded or unloaded, but that releases the bunk when the shear-pin is mistakenly left engaged during travel. The shear-pin shears, or otherwise comes apart, when the power of the log load or the turning tractor forces the bunk to swivel relative to the tractor or trailer. The preferred shear-pin comprises a shoulder pin and a pin cap connected with a threaded insert. When the forces of a swiveling bunk push on the pin cap and the shoulder pin sideways in opposite directions, the insert breaks. A new insert may then be easily installed into the undamaged pin cap and shoulder pin. Thus, the shear-pin prevents damage to the bunk-ears and only allows damage of an inexpensive and replaceable portion of the shear-pin.

Abstract: Torque limiting bolt employs a number pins which shear upon the application of a predetermined torque to the bolt head. The bolt configuration insures that sheared portions of the pins are held within the bolt head to prevent undesirable scattering of the pin portions on an airstrip. A removal hex head is thinner than a driving hex head positioned over the removal hex to discourage the application of a wrench directly to the removal head. The outermost portions of the hex heads are also angularly displaced from each other for this purpose.

Abstract: A fastener includes a threaded pin and an internally threaded collar. The threads can freely be run without impediment during tightening. After the fastener is tightened, a tool engages a shoulder on the collar and presses a deflector against the collar on the pin to deflect it so as to form a lock against loosening.

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 expansion bolt, particularly adapted for supporting the roof of a mine tunnel, includes an elongate stud having distal and proximal threaded ends. Coaxially mounted on the stud near the distal end is an expansion sleeve that is axially divided into a plurality of circumferentially-spaced sleeve segments. A cam element is threadedly attached to the distal stud end. The cam element is formed of a sheet metal stamping; and includes an annular collar with a plurality of circumferentially-spaced fingers extending proximally from the periphery of the collar. The fingers also taper radially outwardly to give the cam element a frusto-conical configuration. The proximal ends of the fingers engage the interior surface of the sleeve near the distal end of the sleeve. The sleeve is constrained from axial movement on the stud, and the stud is rotatable independently of the cam element and the sleeve. The proximal end of the sleeve has a nut adapted for the application of a torque thereto.

Abstract: The security device consists of a bolt portion and/or a bolt fastener portion which utilize nuts which do not threadedly engage any other part, but give the impression that they do so and that they are the fastening means. These nuts turn freely as if stripped if an unauthorized person attempts to remove them.

Abstract: A mechanical anchor including an expansion shell and a camming plug positioned in the shell is threaded onto the end of a mine roof bolt. A roof support plate is carried on the opposite end of the bolt. The mechanical anchor is inserted in a bore hole drilled in a rock formation with one or more resin cartridges advanced by upward movement of the bolt to the end of the bore hole. The cartridge is ruptured by upward thrust and rotation of the bolt to release the resin components for mixing. A stop device extending through the plug abuts the end of the bolt to prevent axial movement of the plug on the bolt when the bolt is rotated in a preselected direction to mix the resin components before the shell is expanded. Rotation of the bolt continues without expansion of the shell for a period of time to permit formation of a curable resin mixture.