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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8156779 | Apparatus and method of producing spark plug In an apparatus for producing a spark plug, approach driving conditions are calculated on the basis of a specified thrust feeding amount so that, while a temporal overlap occurs between a time period of feed-driving toward a rolling position P2 of a workpiece... | 04/17/2012 |
| 8132439 | Bottle can member, bottle, and thread forming device An effective thread number in the thread section which is disposed on the mouth section of the bottle is formed to be 2.2. That is, the thread section is formed such that the thread section 13 should serve effectively in the mouth section such that an interva... | 03/13/2012 |
| 7905130 | Apparatus for threading cans A threading turret assembly includes a plurality of threading heads. The threading heads comprise first and second threading rollers. The threading head is configured to impart a thread onto a metallic can such that a threaded cap may be screwed onto the can to seal... | 03/15/2011 |
| 7373796 | Automatic releasing-type rolling head for forming tapered thread on pipe The invention is aimed at the provision of an automatic releasing-type rolling head for forming a tapered thread on a pipe in which the shock generated at the end of the thread rolling operation is alleviated and a thread automatic rolling roller retracting mechanis... | 05/20/2008 |
| 7353676 | Method and apparatus for precision rolling of rotationally symmetrical components An apparatus (1) and a method serve for precision rolling of a surface area (2) of a rotationally symmetrical component (3), especially a screw. The apparatus (1) includes at least two spaced apart rolling tools (4, 5), a measuring... | 04/08/2008 |
| 7268449 | Linear actuator having mechanism for stopping linear movement of output shaft without touching rotor A stopper member is included in a linear actuator comprising a stator assembly, a rotor assembly, an output shaft, and a stopper pin which is fixedly disposed at a frontward portion of the output shaft, and which is adapted to axially control the mode and amount of ... | 09/11/2007 |
| 7225656 | Process for forming a workpiece and rolling machine In the transverse wedge rolling machine as claimed in the invention the drive motor is a permanent magnet motor, especially a torque motor. Furthermore the rotational speed of the rollers is controlled depending on their rotary position. ... | 06/05/2007 |
| 7204115 | Axial thread-rolling head An axial thread-rolling head comprising a shank and a bearing unit held by said shank and having the profiled rolling dies wherein said shank has an elongate gripping portion, a first clutch portion, a supporting portion for the bearing unit, and a driver portion fo... | 04/17/2007 |
| 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 |
| 7140219 | Swaging head assembly An apparatus for imparting a predetermined profile to one end of a workpiece mounted on a main axis. The apparatus comprises a rotary head mounted for rotation about the main axis and at least two fingers pivotally mounted to the rotary head for pivotal movement bet... | 11/28/2006 |
| 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 |
| 7073361 | Tangential thread-rolling head A tangential thread-rolling head comprising two fork-shaped rolling head arms in which thread-rolling dies are rotatably supported by means of parallel axles wherein the thread-rolling dies are in a lateral engagement with a pinion seated on the axles of a gearing c... | 07/11/2006 |
| 7040132 | Two-piece upper tool The two-piece upper work tool 20 includes a first body member 22 and a second body member 24 which are generally mirror images of each other. The body members 22, 24 include a plurality of orifices 28 therethrough. One of the body ... | 05/09/2006 |
| 7040131 | Cold forming tool, machine and method Cold forming tool including at least one penetration zone having teeth and a calibration zone having teeth. The teeth having a tooth height that increases substantially from the at least one penetration zone to the calibration zone. A distance between an outer surfa... | 05/09/2006 |
| 7032421 | Knurling tool A knurling tool is provided having a tool head which carries at least one knurling wheel and which is mounted adjustably on a shaft, wherein the tool head is mounted on the shaft linearly displaceably transversely with respect to the axis of the shaft, characterized... | 04/25/2006 |
| 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 |
| 6993949 | Power or manually operated pipe grooving tool A pipe grooving tool is disclosed having a housing on which a back-up roller and a grooving roller are rotatably mounted. The grooving roller is pivotably movable toward the back-up roller and has a raised tool surface engageable with the outer surface of the pipe. ... | 02/07/2006 |
| 6988388 | Thread rolling attachment A thread rolling attachment (50) is adapted to be mounted on a machine tool and to be selectively moved in an axially direction relative to a workpiece (W) having a cylindrical surface upon which a thread is to be rolled. The improvement broadly includes a ce... | 01/24/2006 |
| 6935152 | Orbiting roller groover for pipe An apparatus and method for forming grooves in a pipe for receiving mechanical pipe clamps are disclosed. The apparatus includes a holding fixture for securing the pipe and a carriage rotatably mounted on the holding fixture. Two arms are pivotably mounted on the ca... | 08/30/2005 |
| 6918278 | Pipe preparation tool adaptable for different diameter pipes A tool for preparing pipes for coupling using mechanical couplings is disclosed. The tool has a movable roller pivotally attached to a body, a tapered roller rotatably attached to the body and a plurality of tool rollers rotatably mounted on a carriage slidable with... | 07/19/2005 |
| 6915673 | Method of rolling worm gear and the worm gear A worm is formed by rolling to reduce the number of processing steps while ensuring the worm accuracy satisfactorily. A work material is positioned between a first rolling die (100) and a second rolling die (101) by rotation of the rolling dies and a s... | 07/12/2005 |
| 6912883 | Load measuring system for a thread rolling machine and operating method therefor A thread rolling machine forming a threaded member from a workpiece includes a die, a device for rotating the die, a device for generating a load applied to the die in a workpiece-feeding direction, a member that deforms under the applied load during a thread rollin... | 07/05/2005 |
| 6748779 | Tangential rolling attachment for a machine tool A tangential rolling attachment (20) for a machine tool, broadly includes a body (21); a pair of arms (22L, 22R) having their proximal marginal end portions (23L, 23R) pivotally mounted on the body and having distal marginal... | 06/15/2004 |
| 6684674 | Tread rolling head An axial thread rolling head comprising a bearing unit including rolling dies supported via eccentric shafts, a shank which is axially movable with respect to the bearing unit and has a clutch portion which interacts with a claw clutch portion of a spring... | 02/03/2004 |
| 6598444 | Tangential rolling head A tangential rolling head with a basic body including means for loading it in a machine tool, two two-armed levers pivotally supported about a common axis of the basic body one lever arm of which is traversed by a formed-type roll and the other lever arm ... | 07/29/2003 |
| 6508095 | Thread-rolling end-working attachment An improved end-working attachment (30) for a screw machine or a rotary transfer machine is particularly suited for use in rolling threads on a workpiece. The attachment broadly comprises: a slide base (31) having an axis (y-y); at least two members (32, ... | 01/21/2003 |
| 6202461 | Tangential thread rolling head The attachment includes a generally U-shaped bracket having a pair of roll arms which are pivotally mounted intermediate their ends on the outer ends, respectively, the two arms of the U-shaped bracket. Each roll arm has a thread roll rotatably mounted on... | 03/20/2001 |
| 5992199 | Modular knurling tool A modular knurling tool is provided having a tool shank defining a first dove-tail connector and having at least one adjustment drive recess. Any selected one of a number of different knurling heads are adjustably connected to the tool shank by a second d... | 11/30/1999 |
| 5924317 | Radial roller head The invention discloses a radial roller head with rollers arranged in a holder over the same angular distances and distributed at axial distances about the rolling axis. The roller surfaces of the rollers have over the circumference a spiral-shaped increa... | 07/20/1999 |
| 5870918 | Thread rolling head A thread rolling head with at least two profile rollers provided with a forming thread that are rotatably supported in a supporting unit and a feed motion device that will cause the profile roller to clamp and release a cylindrical work piece, wherein eac... | 02/16/1999 |
| 5784912 | Tangential rolling head The invention relates to a tangential thread rolling head with two fork-shaped rolling head arms in which thread rollers are rotatably mounted by way of parallel axles. The thread rollers are in engagement with a pinion, sitting on the axles, of a gear co... | 07/28/1998 |
| 5699691 | Adjusting apparatus for roll threading die head An adjusting apparatus for a roll threading die head with a head body having a plurality of threading rollers located on an imaginary circle concentrical to an axis of a cylindrical workpiece to be threaded. There are provided eccentric bearings which rot... | 12/23/1997 |
| 5568743 | Axial thread rolling head Axial thread rolling head which comprises a bearing unit including the thread rollers and rotatably supporting said thread rollers by means of eccentric shafts, an axial shank being axially movable with respect to said bearing unit and, in a first axial r... | 10/29/1996 |
| 5379623 | Radial milling head The present invention relates to a radial milling head, in particular for thread milling, comprising a casing, a plurality of peripherally spaced rollers which are equidistantly arranged about a center axis of said casing and which are rotatably supported... | 01/10/1995 |
| 5167136 | Thread roll attachment Each of the two, pivotal, roll supporting arms of a thread rolling attachment has therethrough adjacent the end thereof remote from its pivotal axis a bore in which one end of a cylindrical pattern roll supporting shaft is adjustably secured. The axis of ... | 12/01/1992 |
| 4942752 | Apparatus for reforming and restoring the surface of a cylindrical workpiece manually A handtool for restoring and reforming the surface of cylindrical workpieces.... | 07/24/1990 |
| 4924687 | Quick release thread roll support An annular threading roll is releasably secured to one end of a support shaft by a ball detent which in its locking position seats at one side in a semi-spherically shaped recess that is formed in the inner peripheral surface of the roll, and which is eng... | 05/15/1990 |
| 4794821 | Method of roll forming a skip threading tap A method of roll forming a skip threading tap by plastic deformation of metal.... | 01/03/1989 |
| 4785649 | Tapered thread roll-forming machine An apparatus for forming tapered threads to a workpiece such as a pipe comprises a casing and a supporting member attached to one side of the casing, and three support plates rotatably attached to the supporting member. Roller members or cam members are s... | 11/22/1988 |
| 4771623 | Threading and projection forming on different size diameters An apparatus for forming splines in a first portion (22) of a shaft (13) of a workpiece (12) and a thread in a second portion (24) of the shaft (13) which has a smaller cross sectional diameter than the first portion (22), the apparatus including supports... | 09/20/1988 |
