Class 470/185 - Screw threading die

Subclass of Class 470 - Threaded, headed fastener, or washer making: process and apparatus
Definition: Subject matter wherein the device is specially adapted for
No. of patents: 40
Last issue date: 11/01/2011

Number	Title	Issue Date
8047923	Split rethreading die A rethreading die for clamping over a section of threaded rod is formed of two separable identically die section halves. Each die section has one-half of an outer gripping surface and an inner abutment face formed of identically shaped spaced first and second face s...	11/01/2011
7887424	Tool for repairing damaged screw threads There is provided a tool for repair of damaged threads of screws, including a body (2) having a projecting portion (4) for accommodating a screw to be repaired and having two recessed major surfaces; a cutting blade (6), having a rear end hinged...	02/15/2011
7862441	Self aligning die The die has a bore that is generally sized to fit onto a like-sized stud. Threads are formed on the interior of the bore for cutting the threads on the stud. The die includes an integrated alignment mechanism to ensure that the die is aligned with respect to the stu...	01/04/2011
7217195	Method of producing left-right screw The present invention provides a method for manufacturing a right- and left-hand screw having a first external right-handed thread and a second external left-handed thread formed by an inexpensive rolling process using a rolling die with a first thread-cutting die f...	05/15/2007
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
7156600	Die for, method of making, and fastener with lobed primary thread lead and interposed dual auxiliary thread lead with improved substrate entry end portion A threaded fastener comprises a first, primary thread lead, and a pair of second, auxiliary thread leads alternatively interposed between successive threads of the first, primary thread lead, except within the vicinity of the tip portion of the fastener so as to def...	01/02/2007
7118313	Cutting die head A cutting die head that can be set and/or reset without an external mechanism. To this end, the die head includes a die body including a plurality of radially adjustable blocks, each block having a cutter mounted thereon and a radially outwardly facing cam surface. ...	10/10/2006
7108607	Helical groove fasteners and methods for making same Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least...	09/19/2006
7065996	Rolling die for ball screw A rolling die for a ball screw has: a cylindrical portion including a helical protrusion formed in an outer peripheral surface thereof for forming a helical ball groove in a raw material of a screw shaft of the ball screw; and a conical lead-in portion formed in one...	06/27/2006
7013692	Valve guide grooving tool A tool for grooving an outer surface of a valve guide comprising a tool body, a tightening nut disposed about a portion of the tool body, one or more rollers rotatably mounted within a bushing, and a handle for rotating the one or more rollers of the tool about the ...	03/21/2006
6957557	Threaded fastener with dual reinforcing leads for facilitating manufacture of the fastener, thread rolling die for forming the threaded fastener, and method of manufacturing the threaded fastener A new and improved thread rolling die for forming a new and improved threaded fastener, and a new and improved method or technique of manufacturing the new and improved threaded fastener, is disclosed wherein the new and improved threaded fastener comprises a first,...	10/25/2005
6921236	Tool for repairing damaged threads A tool for rethreading a damaged threaded object having a solid body with at least one through bore including at least one cutting tooth. A slot intersects the through bore, allowing relief for shavings removed from the object as it is rethreaded. The tool can be ad...	07/26/2005
6878069	Helical groove fasteners and methods for making same Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a threaded portion, and at least one groove extending through at least...	04/12/2005
6708544	Thread rolling die and process for the production thereof In a rolling die for forming a ball screw by rolling for example, a biting portion is formed on one end of a straight portion while a relief portion is formed on the other end. Further, the helical protrusion on the biting portion and the helical protrusion on the r...	03/23/2004
6589122	Thread tapping device A thread tapping device has a main seat, a rotating head, a handle rod, an adjustment rod, a pivot connector, and a pair of scrape blades. The main seat has a V-shaped groove, a bottom pivot hole, a through aperture, two connection bars, and an end block....	07/08/2003
6464592	Device for cleaning and restoring threads of a threaded article A device for cleaning-and-restoring threads of a threaded article for more easily and efficiently cleaning and restoring threads of various sized threaded article. The device for cleaning and restoring threads of a threaded article includes a pliers compr...	10/15/2002
6314778	Rolling die and surface processing method for rolling die In a rolling die as a tool for thread-rolling screws, an electrode exhaustion-melted substance or its reactive substance of a discharge electrode (5) generated by discharge energy based on an in-liquid gap discharging is adhered to an deposited onto a rol...	11/13/2001
6206620	Thread chasing tool and method A pivoting split thread chasing die for rethreading and cleaning damaged or inhibited studs or bolts; and a method of manufacturing the die. The identical main body halves of the pivoting split die, when assembled together with an assembly pin form a pivo...	03/27/2001
6062777	Machining threaded tubular goods A method is provided for machining threads on cylindrical parts, particularly oil country tubular goods, by mounting four thread-cutting chasers in a die head of a thread cutting machine. The thread chasers are each of unique profile, which enables the cu...	05/16/2000
5979216	Wear resistant tool insert A wear-resistant tool insert for machines used in the manufacture of nails, screws, rivets and similar items from a wire starting material. The tool insert is of divided design in the axial direction of the supplied wire. Thus, during application of the t...	11/09/1999
5902079	Combination die and tap A thread cutting tool is provided to simultaneously cut opposed concentric screw threads on a connector member. The tool comprises a cylindrical body with radially spaced first and second thread cutting sections and is adapted to cut threads in soft mater...	05/11/1999
5890852	Thread cutting die and method of manufacturing same A thread cutting die or chaser for use with a power driven thread cutting machine is provided with a protective coating of an ultra hard material such as titanium nitride which is initially excluded from or is subsequently removed from the faces of the th...	04/06/1999
5797802	Die head A fast-acting die head that is particularly well-suited for use with small-size workpieces employs a set of chasers, each formed as a single piece and having a nose portion that provides two force-receiving surface elements. One of the surface elements is...	08/25/1998
5655856	Stock guide A apparatus to orient stock with respect to a threading die. One embodiment of the apparatus detachably mounts to a die and receives and aligns stock prior to its introduction into the threading zone of the die. A second embodiment is an improvement to an...	08/12/1997
5297997	Hand held threading device for earring post A hand-held tool is provided for applying threads to an earring post, to enable the earring post to thereafter receive a clutch member in a non-slip relationship. This novel tool comprises an elongate member of generally cylindrical configuration, around ...	03/29/1994
5224900	Bolt and screw repairing tool A bolt and screw repairing tool comprises mainly a main body, a rotating cutting and pressing body, and a positioning cutting and pressing body. The main body comprises a handle, a protruded portion, and a recessed portion. The protruded portion is provid...	07/06/1993
4969780	Method for using a die holder with centering and squaring guide to cut threads on a cylindrical workpiece A method for using a die holder with centering and squaring guide to cut preliminary and final threads on rotatable stationary workpieces is provided and includes a locating pin, a die with set screw, a shim, a die holder with two lock screws, a guide, th...	11/13/1990
4968190	Method of cutting threads A method of threading or rethreading a member by the use of a die made up of a plurality of complementary separable interfitting parts held together by a tensional element disposed around the exterior surface thereof which in use are separated from one an...	11/06/1990
4927302	Threading device A threading device which can cut a uniform and symmetrical screw thread in the outer surface of a round bar or tube includes a die nut having internal cutting threads and two axial holes and a guide ring which includes two axial roll pins extending away f...	05/22/1990
4872790	Segmented die A threading or rethreading die made up of a plurality of complementary separable interfitting parts held together by a tension spring disposed around the exterior surface thereof which in use are separated from one another under the tension of the spring ...	10/10/1989
4824297	Thread forming apparatus having tangential chasers for cutting a thread on a railroad spike The present invention relates to a device for cutting a thread on a railroad spike. The device employs tangential chasers which are designed to form a thread on a cylindrical portion and a tapering portion of the shank. The chasers form a thread having a ...	04/25/1989
4752163	Thread cutting diestock assembly A thread cutting diestock assembly is disclosed comprising a ratchet housing having a bore adapted to selectively and detachably receive a large thread cutting die head or an adaptor ring, each of which is provided with ratchet teeth engaged by a pawl on ...	06/21/1988
4740118	Self-opening diestock A self-opening diestock which is characterized by the fact that it comprises a rotating operating part which carries the thread-cutting dies that are capable of radial travel and have two grooves in which are accommodated the heads; means for exerting an ...	04/26/1988
4572713	Cutting insert for thread cutting A thread cutting insert comprises parallel side surfaces and two mutually adjacent edge surfaces, which are provided with cutting teeth and extend between the side surfaces. For purposes of minimizing the amount of material ground away from a blank during...	02/25/1986
4531863	Thread-cutting apparatus Thread-cutting apparatus includes an indexable insert having multiple thread-cutting profiles. The invention may be embodied either in a thread-milling insert or a thread-chasing insert. The insert is configured to provide clearance for internal threading...	07/30/1985
4526496	Tapered thread cutting machine A tapered thread cutting machine includes a multi-part rotary machining head, one part including a through-recess and another being a separable interior wear plate. Interacting chaser holders are mounted in the recess and include angled V-shaped slots in ...	07/02/1985
4346491	Thread repair tool The invention, in its preferred form, involves a pair of complementary substantially half-nut sections adapted to be manually assembled about a stud having a damaged thread to be repaired, the side walls of the half-nut sections being substantially arcuat...	08/31/1982
4282618	Die for cutting screw-threads A die for cutting screw-threads, especially for cutting threads into steel for reinforcing concrete and the like with an external thread cutting machine to which the die is operatively connectible by means of a mounting portion having a support surface is...	08/11/1981
4150450	Thread reforming tool with lockable rotary jaw structure Apparatus for re-forming a helical screw thread includes a carrier; opposed jaws to be received in thread defined grooves at opposite sides of the body forming the thread; one jaw carried in fixed position by the carrier; a shaft mounting the other jaw an...	04/24/1979
4123194	Profiled chip breaker A chip breaker includes an abutment surface having geometry generally corresponding in profile to the geometry on the cutting edge of the associated thread chaser to permit such abutment surface to be uniformly spaced from respective roots and crests of t...	10/31/1978

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Class 470/185 - Screw threading die