Abstract: A fastener assembly to be used in the construction of semi-trailers consisting of a first fastener having a head and a shank, a mating second fastener, and a plurality of axially extending knurls formed on the shank. The knurls engage in a hole for receiving the first fastener to prevent rotation and removal of the first fastener. The first fastener may also be provided with an encapsulating cover with two sealing points on its underside to seal the fastener to a surface through which the fastener is inserted.

Abstract: A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. Each alternating lobes and troughs is defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to a rotational axis. The fastener side wall may taper at about 60°. The driver side wall may taper at about 60°. Alternatively, the driver side wall may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition defines a drive angle, which may be between 0° and 5°.

Abstract: A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 45° from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener.

Abstract: A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 65° from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener. The taper angle may be nominally 52° from the rotational axis.

Abstract: A threaded fastener having a thread defined by a crest portion, a leading flank, a first root portion, a second root portion, and a trailing flank, configured to engage an externally threaded trapezoidal threadform. The thread may alternatively be defined by a foot portion, a leading flank, a first crest portion, a second crest portion, and a trailing flank, configured to engage an internally threaded trapezoidal threadform.

Abstract: Thread profiles providing multi-point contact improving the vibration resistance of the threaded fastener, and thereby greatly reducing the need for fastener coatings, such as nylon patches. In various embodiments, the threaded faster may have a threaded portion configured to engage two or three points of a mating thread, and the threaded portion has a thread defined by a crest portion, a leading flank, at least one root portion, and a trailing flank, all of which may be oriented at angle relative to the normal axis.

Abstract: A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. Each alternating lobes and troughs is defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to a rotational axis. The fastener side wall may taper at about 60°. The driver side wall may taper at about 60°. Alternatively, the driver side wall may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition defines a drive angle, which may be between 0° and 5°.

Abstract: A torque transmission driver has a main body having a first end portion adapted to receive and transmit torque from a torque generation source and a second end portion opposite the first end portion having a series of four, five or six lobes and troughs about a rotational axis, and a drive side transition between each lobe and trough on at least one side of each lobe forming a negative drive angle between ?2° and ?10°. A fastener corresponding to the torque transmission driver has a drive end portion adapted to engage the torque transmission driver and a lead end portion adapted to fasten the fastener, the drive end portion having a series of four, five or six lobes and troughs about a rotational axis, and a drive side transition between each lobe and trough on at least one side of each lobe forming a negative drive angle between ?2° and ?10°.

Abstract: Thread profiles providing multi-point contact improving the vibration resistance of the threaded fastener, and thereby greatly reducing the need for fastener coatings, such as nylon patches. In various embodiments, the threaded faster may have a threaded portion configured to engage two or three points of a mating thread, and the threaded portion has a thread defined by a crest portion, a leading flank, at least one root portion, and a trailing flank, all of which may be oriented at angle relative to the normal axis.

Abstract: Disclosed are new thread profiles that provide multi-point contact improving the vibration resistance of the threaded fastener, and thereby greatly reducing the need for fastener coatings, such as nylon patches. In various embodiments, the threaded faster may have a threaded portion configured to engage two or three points of a mating thread, and the threaded portion has a thread defined by a crest portion, a leading flank, at least one root portion, and a trailing flank, all of which may be oriented at angle relative to the normal axis.

Abstract: A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. The three alternating lobes and troughs are each defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to the rotational axis. The fastener side wall may taper at about 60°. The driver side wall may taper at about 60°. Alternatively, the driver side wall may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition defines a drive angle which may be between 0° and 5°.

Abstract: A torque transmission driver is disclosed. The torque transmission driver has a main body having a first end portion and a second end portion, where the first end portion is adapted to receive and transmit torque from a torque generation source, and the second end portion is opposite the first end portion and has a key shape adapted to fit a recess in a fastener and has a protruding lead end having a taper between 10 and 30 and different in shape than the key shape with at least a portion of the protruding lead end substantially coextensive with the major dimension of the key shape. A torque transmission driver adapted to drive a small fasteners is also disclosed where the key shape is adapted to fit the recess of the small fastener.

Abstract: A pneumatically powered fastener installation tool (2) comprising floating pull (24) and return (26) pistons which are free to move axially within the main channel (22), thereby providing compliance when transmitting pressure from a double-acting pneumatic piston (16) and intensifier rod (18) to a head piston (6) thereby to install a fastener such as a lockbolt and preventing the generation of a vacuum condition on oil loss during the pull stroke of the tool.

Abstract: A torque transmission driver is disclosed having a shaft adapted to receive and transmit torque from a torque generating source to the driver and a nib having a five or six lobe key-shape adapted to fit in a recess in a fastener, the nib being equal to or less than 0.050? in length and having lobes of substantially the same form along the entire second end portion.

Abstract: A torque transmission driver is disclosed. The torque transmission driver has a drive axis and a main body with a first end portion and a second end portion, where the first end portion is adapted to receive and transmit torque from a torque generating source to the driver, and the second end portion is opposite the first end portion and has a key shape adapted to fit a recess in a fastener and has a protruding lead end having a taper between 10° and 30° and different in shape than the key shape with at least a portion of the protruding lead end initiating at the major dimension of the key shape. A torque transmission driver adapted to drive a small fasteners is also disclosed where the key shape is adapted to fit the recess of the small fastener.

Abstract: A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. The three alternating lobes and troughs are each defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to the rotational axis. The fastener side wall may taper at about 60°. The driver side wall may taper at about 60°. Alternatively, the driver side wall may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition defines a drive angle which may be between 0° and 5°.

Abstract: Disclosed are new thread profiles that provide multi-point contact improving the vibration resistance of the threaded fastener, and thereby greatly reducing the need for fastener coatings, such as nylon patches. In various embodiments, the threaded faster may have a threaded portion configured to engage two or three points of a mating thread, and the threaded portion has a thread defined by a crest portion, a leading flank, at least one root portion, and a trailing flank, all of which may be oriented at angle relative to the normal axis.

Abstract: A self-clinching fastener suitable for connection to a member having a shank of a diameter less than a head portion, the head portion having at least eight lands extending outwardly along the underside of the head portion spaced about the shank, each land having a face surface extending beyond the shank to a diameter less than or equal to the radius of the head portion, the width of the lands reducing from adjacent the shank toward the radius of the head portion. The fastener further includes an axial annular engagement groove having a diameter larger than the shank, the annular engagement groove axially extending from the lands to a retaining collar adjacent the shank, the groove adapted to relieve material of a member on installation by receiving material as the lands in the underside of the head portion mechanically interlock with the member.

Abstract: A self-clinching fastener suitable for connection to a member having a shank of a diameter less than a head portion, the head portion having at least eight lands extending outwardly along the underside of the head portion spaced about the shank, each land having a face surface extending beyond the shank to a diameter less than or equal to the radius of the head portion, the width of the lands reducing from adjacent the shank toward the radius of the head portion. The fastener further includes an axial annular engagement groove having a diameter larger than the shank, the annular engagement groove axially extending from the lands to a retaining collar adjacent the shank, the groove adapted to relieve material of a member on installation by receiving material as the lands in the underside of the head portion mechanically interlock with the member.

Abstract: A fastener (2) for securing a workpiece comprising a plurality of workpiece members, said fastener comprising a shank (4) and a radially enlarged head (6), wherein the fastener further comprises axial voids (40) and splines (18) provided on the internal wall of the bore of the fastener, such that when the fastener is installed into a workpiece by a mandrel, breakstem or pin, once the shank of the fastener has contacted with the walls of the workpiece apertures, the crests of the splines are deformed by the mandrel, breakstem or pin, and material of the crests is displaced into the voids.