Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7914244 | Fastener with zoned, varying wave-form thread A threaded fastener includes a shank having a tip and a head configured for engagement by an associated driving tool. The fastener is configured for use with an associated threaded opening. The head is disposed on the shank opposite the tip. The shank has a helical ... | 03/29/2011 |
| 7354262 | Strain matched threads for a high pressure high temperature press apparatus The present invention includes a hydraulic cartridge and unitary frame connection for a high pressure high temperature press apparatus with the hydraulic cartridge having a cylindrical base and truncated hollow conical section The truncated section has an external t... | 04/08/2008 |
| 7326014 | Interactive fit screw thread A threaded fastener includes a curved-line path thread provided in a helical pattern along a shank of the fastener. The curved-line path can be provided on either side of the standard straight-line path or on opposite sides of the straight-line path. The curved-line... | 02/05/2008 |
| 7159429 | Method and device for manufacturing bolt, screw rolling die used therefor, and multiple screw bolt A method and apparatus for manufacturing a bolt capable of mass-producing a multiple screw bolt such as a so-called double screw bolt at a low unit price, and a thread rolling die for use therein. The apparatus for manufacturing a bolt comprises a pair of thread rol... | 01/09/2007 |
| 7048487 | Connector A connector comprising an adapter having a threaded bore and a bushing having an external thread and an internal thread. The adapter has a stop on an outer surface to prevent rotation. The bushing is threaded into the adapter bore. A bolt is threaded into a bushing ... | 05/23/2006 |
| 7044702 | Screw with a plurality of screwing angles and mold device for forming the same The screw with a plurality of helix angles comprises a first section having a first thread with a first helix angle, at least one third section having a third thread with a third helix angle; and a fifth section having a fifth thread with a fifth helix angle wherein... | 05/16/2006 |
| 7025550 | Pull type swage fasteners with removable mandrel A pull type swage fastener including a pin and a collar adapted to be swaged into a locking portion on the pin shank and with a removable mandrel being threadably securable in a pull cavity at the end of the pin shank and with the mandrel adapted to be gripped by an... | 04/11/2006 |
| 7007984 | Hang-free thread design A threaded pin and box connection having thread geometries and/or dissimilar thread fits that prevent the pin thread of a connection from hanging up in the box thread as the pin is being stabbed into or destabbed from the box. Dissimilar geometries and/or threads in... | 03/07/2006 |
| 6843508 | Hydraulic device A hydraulic device having a nut part with a threaded hole which has an internal screw thread with a defined nominal diameter and with a defined, uniform pitch, and having a screw part which has an external screw thread with the same nominal diameter as the threaded ... | 01/18/2005 |
| 6811552 | Device for securing bits of bone together Device for securing bits of bone together, particularly small-sized bats of bone, for example bits of metatarsal head, in the form of a spindle including an elongate shank (1) followed, after a breakable region (2), by a fixator element (3) exte... | 11/02/2004 |
| 6736576 | Nut disengagement prevention structure and battery terminal incorporating same In a nut disengagement prevention structure, a bolt has an external thread. A nut which is thread on the bolt has an internal thread. A thread portion which is the closest to a leading end of the bolt has a first minor diameter. Any other portion of the thread of th... | 05/18/2004 |
| 6572315 | Threaded fastener having a thread crest greater than its thread root A progressive (variable) pitch, interlocking thread with a tooth cross-section that is wider at its crest than at its root which creates radial clamping action when tightened into a tapped hole that has a similar thread cross-section.... | 06/03/2003 |
| 6120865 | Method for producing molding die for synthetic resin lens barrel having a helicoid and for producing the lens barrel An inner barrel includes a male helicoid, and an outer barrel includes a female helicoid which can engage with the male helicoid of the inner barrel. The included angle of trapezoidal threads of the male helicoid are identical to an included angle of trap... | 09/19/2000 |
| 6079921 | Anchor bolt for friable material The anchor bolt comprises a generally hollow body (1) with a drilling end (4), a supporting collar (5) at the other end and an external screw thread (6). The collar (5) forms two openings (10, 11), diametrically opposed, for receiving an anti-rotation pin... | 06/27/2000 |
| 6059500 | Arrangement and method for detecting a fatigue fracture of a bolted connection caused by overstressing An arrangement for detecting a fatigue fracture caused by overstressing of a bolted connection including a bolt and an internal-thread-bearing hollow section which is alternately stressed by an axial flux of force between zero and different maximal values... | 05/09/2000 |
| 5964768 | Tapered bone screw with continuously varying pitch A bone screw having a continuously varying pitch includes a tapered root portion having a relatively small diameter on a leading end of the screw and a larger trailing diameter. The pitch of the screw decreases between the leading and trailing ends thus c... | 10/12/1999 |
| 5938383 | Connector assembly and method of forming same A connector assembly that is subjected to alternating loads by an axial flow of force between zero and various maximum values, with an outer assembly component designed as a hollow section and an inner assembly component located in the outer one and fitti... | 08/17/1999 |
| 5908276 | Annular engagement lock nut A prevailing torque type lock nut for assembly onto a threaded bolt that affords a substantially 360 degree break loose torque engagement resistance against the standard bolt threads and is comprised of a compressively controlled height reduction as compa... | 06/01/1999 |
| 5882160 | Loosening and dislodging preventing screw The present invention relates to a male and female screw set wherein the male screw comprises at least a projecting part pressing against the flank plane of the female screw when the male and female screws are engaged. A dimensional difference is formed b... | 03/16/1999 |
| 5569009 | Loosening prevention screw The screw of this invention can be used for fastening members of a variety of materials and reliably prevent loosening of the screw. The screw shank is formed with two threads, a main thread for driving the screw and a sub-thread which extends in the same... | 10/29/1996 |
| 5562672 | Tapered bone screw with continuously varying pitch A bone screw having a continuously varying pitch includes a tapered root portion having a relatively small diameter on a leading end of the screw and a larger trailing diameter. The pitch of the screw decreases between the leading and trailing ends thus c... | 10/08/1996 |
| 5490190 | Alignment pin and method for aligning a nuclear fuel assembly with respect to a core plate disposed in a nuclear reactor pressure vessel Self-locking alignment pin and method for aligning a nuclear fuel assembly with respect to a core plate disposed in a nuclear reactor pressure vessel. The fuel assembly has a top nozzle having a first bore formed therein. The core plate has a second bore ... | 02/06/1996 |
| 4854794 | Connector of the nut-and-bolt type A connector of the nut-and-bolt type with a bolt that has an external thread and/or a nut that has an internal thread. The connector has a locking device that provides a moment of friction that counteracts the unscrewing moment. The pitch of the external ... | 08/08/1989 |
| 4846614 | Differential thread for transfer of screw thread forces 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 incr... | 07/11/1989 |
| 4842464 | Equalization of load in threaded connections 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 thre... | 06/27/1989 |
| 4840526 | Gripping device for tensioning screwing elements A gripping device for tensioning a screwing element (2) which, at its free end, has an outer profile matching the inner profile of an engaging member (4). The screwing element (2) has an outer profile with teeth (20) of constant pitch and of constant cros... | 06/20/1989 |
| 4802805 | Fatigue resistant fasteners and related methods 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 n... | 02/07/1989 |
| 4662806 | Metal lock system and method Apparatus for repairing a casting having a crack therein comprising a metal lock to extend across the crack and a lacing plug to fit in the crack, the metal lock formed as a rigid elongate member having a plurality of lobes formed from adjacent portions t... | 05/05/1987 |
| 4661031 | Fatigue resistant fastener assembly A fastener assembly, having a threaded male and female member, is disclosed. One of the members has substantially conventional threads and the other member has two threaded portions rotationally offset relative to one another. Direction of the offset dete... | 04/28/1987 |
| 4476987 | Bottle caps A plastic cap for glass or plastic carbonated beverage bottles is shaped so that in use pressure is exerted around the edges of a gasket to give enhanced sealing. A single cap can fit the different necks of standard glass and plastic bottles. Its heat-shr... | 10/16/1984 |
| 4364136 | Formation of threaded elements having a self-locking action A fatigue resistant self-locking fastener is formed by screwing two threaded elements into engagement with a part having a thread which is slightly off-size with respect to the threads of those elements, locating the two elements just in contact with one ... | 12/21/1982 |
| 4266590 | Prevailing torque nut A threaded fastener assembly comprises a bolt with standard 30° flank V-threads and a nut with 30° flank V-threads modified to have wedge ramps between adjacent top and bottom flanks and characterized by the uniform pitch of the nut threads being a pred... | 05/12/1981 |
| 4237948 | Screw threaded members and their manufacture An externally screw threaded member of the self-locking, prevailing torque type has a series of convolutions of a standard thread form, and a locking series of convolutions of the same thread pitch as the standard series but of wider section and with inco... | 12/09/1980 |
| 4071067 | Self-locking screw threads A screw threaded member having a thread with at least two portions of different form, one portion being of standard form and the other portion, a locking portion, having its root and crest offset from the standard lead, the offset of the crest being in th... | 01/31/1978 |
| 4060116 | Method for producing self-locking fasteners An improved method for producing a threaded, metallic, self-locking fastener having a metallic patch flame sprayed thereon. The improved method includes a heat-treating operation which densifies and smooths the outer surface of the patch while not substan... | 11/29/1977 |
| 4013110 | Locking thread Threads for a fastener of a type having an opening in one member with internal helically-shaped threads around the inner periphery thereof, and another member having helical threads around the outer periphery of a cylindrical portion thereof, wherein the ... | 03/22/1977 |
