摘要:
A screw anchor for concrete attachment to a railroad tie or solid track comprises external threads (16) disposed on the exterior of the screw anchor (10) and internal threads (18) disposed inside the screw anchor (10) for force-fitted connecting to a fastening element (30), wherein the screw anchor (10) comprises two sections (12, 14) adjacent to one another in the longitudinal direction, the first section (12) having a substantially cylindrical external shape and the second section (14) having a substantially conical external shape, and wherein the second section (14) is disposed between the first section (12) and an inlet opening (26) for the fastening element (30).
摘要:
An anchor bolt comprising a main body (4), a bolt head (5), at least one supporting blade (6), an internal thread (2); and an external thread (3); wherein the external thread (3) is disposed along the external surface of the main body (4); the internal thread (2) is disposed along the internal surface of the main body (4) and/or the bolt head (5); and the supporting blade is attached to the main body and the bolt head (5).
摘要:
A threaded insert for providing stronger threads to a parent material. The threaded insert includes a bushing portion having male threads on the external surface and female threads within an internal bore. The threaded insert also includes keys which lock the threaded insert into a threaded hole within the parent material. The keys are positioned within slots along the external surface of the bushing portion of the threaded insert. The slots include two substantially parallel walls which are substantially perpendicular to a bottom surface of the slots. A method for assembling the threaded insert reduces the tendency of the keys to be installed offset from the bottom surface of the slots.
摘要:
There is provided a T-nut having a tubular shank having a cylindrical shape, having a first end and a second end, an inside surface and an outside surface, the tubular shank being made of a thin metal plate pressed to form a female screw on the inside surface, the outside surface having a pattern corresponding to the female screw; and a flange portion formed to the first end of the tubular shank.
摘要:
A threaded insert for providing stronger threads to a parent material. The threaded insert includes a bushing portion having male threads on the external surface and female threads within an internal bore. The threaded insert also includes keys which lock the threaded insert into a threaded hole within the parent material. The keys are positioned within slots along the external surface of the bushing portion of the threaded insert. The slots include two substantially parallel walls which are substantially perpendicular to a bottom surface of the slots. A method for assembling the threaded insert reduces the tendency of the keys to be installed offset from the bottom surface of the slots.
摘要:
The present invention includes a device for providing a blind hole for making a removable connection to an enclosure. The device has a cylindrical shaft with a proximal portion and a distal portion. A head is formed at the distal portion of the shaft. The proximal portion of the shaft has external threads, which may by threaded into a hole of the enclosure. The proximal portion also has a tapped bore, axially formed in the shaft, which has internal threads to receive another threaded device. The tapped bore is closed at the distal portion, such that when it receives the other threaded device, the other device does not intrude into the enclosure.
摘要:
A method of securing a blind fastener (10) in a composite material (40, 42) comprises the steps of forming of hole (48) in an outer wall (40) of the composite material, subsequently inserting a liquid adhesive (50) through the hole (48) so as to fill a chamber (44null) formed in the material behind the hole, then inserting a blind fastener (10) through the hole into the liquid adhesive until the head of the fastener (14) engages with the composite material wall (40), subsequently deforming the blind anchor (62) into engagement with an inner surface of the outer wall (40) to support the blind fastener (10) in the liquid adhesive while it sets and, in particular, for the liquid adhesive to engage with at least one channel (64) formed in the circumference of the fastener. A blind fastener for use in such method comprises an elongate hollow body having an enlarged head (14) and a deformable weakened region (28), in which the body has, remote from the weakened region (28), at least one adhesive receiving channel (64) formed in the outer surface thereof.
摘要:
An inexpensive method for repairing a damaged spark plug hole of a cylinder engine includes drilling the damaged spark plug hole using a drill bit, tapping the drilled spark plug hole, threading a steel insert into the threaded hole and making a spark plug seat. The depth of the drilling, tapping and threading is limited by a stopper. A set of new tools are used to realize the foregoing process. All these procedures can be done while the cylinder having the damaged spark plug hole on the vehicle. The resulting hole is stronger and more durable than the original spark plug hole in the aluminum cylinder head.
摘要:
A bushing adapted to be secured within a circular aperture of a structural channel support member has a head, and a shank portion having an external male machine thread. A centered bore having an internal machine thread penetrates the head and shank portion. The head has a flat inside shoulder adapted to abut against the channel member.
摘要:
A sturdy threaded insert for screws having a trapezoidal thread. To keep the external diameter of this threaded insert small (due to the limited space often available), and to ensure that the female thread produces a perfect seal (if the threaded insert is closed in construction), the threaded insert is constructed as follows: The basic shape of the threaded insert represents a circumscribed quadrilateral, which is a rhombus if the trapezoidal thread is symmetrical and is a parallelogram if the trapezoidal thread is asymmetrical. The superimposed quadrilateral profiles are connected to one another by a web having a minimum wall thickness of about 30% of the useful profile depth of the screw thread, and in any case is at least 0.3 mm. In addition, the threaded flank projections of the annular surfaces are equal on the workpiece side and on the screw side.