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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 |
| 7376482 | Grinding method and apparatus In a grinding method and apparatus, a machining portion of a workpiece is ground with a grinding wheel on a trial, and shape errors in respective rotational phases of the machining portion are measured after the trial grinding. Based on the shape errors, control dat... | 05/20/2008 |
| 7214011 | Key cutting machine A key cutting machine having a vacuum port connected to the housing and capable of removeably connecting a vacuum tube thereto so that when the vacuum tube is connected to the vacuum port the vacuum tube is capable of collecting key shavings created during a key cut... | 05/08/2007 |
| 7182674 | Coolant delivery apparatus for machine tool A coolant delivery apparatus for a machine tool wherein the position of the coolant delivery apparatus is controllable such that coolant may be delivered to the machining contact zone of a tool even though the location of the machining zone of the tool may change su... | 02/27/2007 |
| 7172494 | Crankshaft and camshaft grinder An apparatus for grinding a surface of a nonstraight elongated workpiece has a frame, drives on the frame for rotating the workpiece about a longitudinal workpiece axis, and a guide defining a pivot axis offset from the workpiece axis on the frame. A hanging arm has... | 02/06/2007 |
| 6926591 | Multi-purpose machine The invention concerns a method and an apparatus in which crankshafts and similar components can be machined at the relevant machining locations (big-end bearing locations, main bearing locations, side cheek side surfaces, end journal/end flange) on one machine and ... | 08/09/2005 |
| 6902465 | Grinding machine A grinding machine uses a conical grinding wheel (10) to create a non-circularly symmetric surface (defining, for example, a re-entrant cam) on a workpiece. The machine is operable to rotate such a workpiece about a first axis (5) and the machine has d... | 06/07/2005 |
| 6881125 | Apparatus for processing a lens An apparatus for processing a lens comprising: a means for supporting a lens that freely displaces towards a tool and comprises a holding shaft supporting the lens so that the lens freely rotates, and a means for detecting an angle that detects a rotation angle of t... | 04/19/2005 |
| 6878043 | Rough- and finish-grinding of a crankshaft in one set-up Method of grinding a concentrically clamped crankshaft, a crankshaft grinding machine for carrying out the method, and a crankshaft of high-alloy steel or cast material. The method provides for pin journals and main journals of the crankshaft to be ground in one set... | 04/12/2005 |
| 6517421 | Polishing head of a chemical and mechanical polishing apparatus for polishing a wafer A polishing head of a chemical and mechanical polishing apparatus can uniformly polishing a wafer by sticking the wafer firmly and with uniform pressure to a polishing pad. The polishing head includes a housing through which air is supplied and discharged... | 02/11/2003 |
| 6511364 | Method and apparatus for grinding eccentric cylindrical portions of workpiece with diameter measuring device On a grinding machine, a workpiece having eccentric cylindrical portions is rotated around the work spindle axis so that the eccentric cylindrical portions effects a planetary motion. A grinding wheel is reciprocated toward and away from the work spindle ... | 01/28/2003 |
| 6431966 | Grinding spindle unit with magnetic drive The present invention provides a drive for a grinding wheel of a cam grinding machine, in which case an electric motor is provided with a drive wheel, the drive wheel is provided with equispaced, annular recesses, the annular recesses are fitted on the ra... | 08/13/2002 |
| 6409573 | Combination grinding machine A combination grinding machine grinds a plurality of axially arranged portions of a workpiece by use of a grinding wheel supported rotatably on a first wheel head and a superfinishing wheel supported rotatably on a second wheel head. A numerical control u... | 06/25/2002 |
| 6390907 | Machine tool and machine tool spindle and workpiece mounting-apparatus and grinding process A motorized spindle assembly for a grinding wheel is fabricated with an opening extending through the spindle casing, and stator and so as to extend in the direction of the spindle axis of rotation at least the length of the stator. The opening is of a si... | 05/21/2002 |
| 6309286 | Grinding machine and method of grinding An apparatus for, and method of, grinding crankpins of a crankshaft wherein the machine is under computer control and the grinding wheel is advanced and retracted under computer control so as to follow the planetary motion of the crankpin as the crankshaf... | 10/30/2001 |
| 6234885 | Roll grinding machine In a roll grinding machine (2) for profile grinding of rolls with a constructionally simple device for a very precise adjustment of a grinding wheels (4) supported on a grinding spindle (7) tangentially with respect to a roll profile, the grinding spindle... | 05/22/2001 |
| 6149503 | Method and apparatus for supporting a crankshaft in a grinding machine for grinding the crankpins of the crankshaft A method of supporting a workpiece having journal and eccentric regions, in a grinding machine for grinding the eccentric regions thereof, is described which involves mounting the workpiece in a headstock of the grinding machine, providing a coupling betw... | 11/21/2000 |
| 6135861 | Shaft polishing method and a shaft produced thereby A shaft polishing method includes a roughing step in which the length of fresh abrasive tape is pressed against an area, such as a hydraulic seal area, for selected time intervals while the shaft is rotated at a relatively low speed. A roughing step is fo... | 10/24/2000 |
| 6113471 | Chassis journal corrector system A system for correcting and truing worn journals in engines and motors without removing the crankshaft from the apparatus, or removing the engine from the chassis of a vehicle and disassembling the same. An engine may be left in the chassis, the crankcase... | 09/05/2000 |
| 6077146 | Method of correcting a taper in a grinding machine, and apparatus for the same A taper correcting apparatus for a grinding machine comprises: workpiece supporting means for supporting a workpiece in parallel with a grinding wheel spindle; a cutting and feeding device which moves back and forth a cylindrical grinding wheel with respe... | 06/20/2000 |
| 6015336 | Grinding apparatus A grinding apparatus according to the present invention grinds a work having a plurality of non-circular work faces to be worked with a grindstone driven by a motor. The work faces are disposed at intervals. Distances between a grindstone unit, bearings a... | 01/18/2000 |
| 5975995 | Machining apparatus and method A pair of grinding wheel carriages, each carrying its own grinding wheel, are both carried by a grinding machine to one side of a work carriage and workpiece when carried thereby. The workpiece is, in this instance, a camshaft with multiple pairs of simil... | 11/02/1999 |
| 5928061 | Wheel-head feed mechanism and grinder using the same A wheel-head feed mechanism for a grinder comprising a base and a wheel head which is guided by a linear guide section provided on the base and rotatably supports a grinding wheel via a wheel spindle driven by a motor. The wheel-head feed mechanism includ... | 07/27/1999 |
| 5899797 | Method and apparatus for grinding cams with concave sides A grinding machine includes a bed, structure for supporting a camshaft on the bed, a carriage displaceably mounted on the bed to permit movement relative to the camshaft in a radial direction of the camshaft, first and second grinding spindles respectivel... | 05/04/1999 |
| 5730647 | Apparatus for fine-grinding a crankshaft A crankshaft having a substantially cylindrical crank surface centered on a crank axis and a pair of axially confronting and axially spaced cheek surfaces flanking the crank surface and meeting the crank surface at respective fillets is ground by an appar... | 03/24/1998 |
| 5700186 | Motorized spindle with indexing fixture A spindle, comprised of a spindle body and an indexing fixture, is configured to retain, and rotatingly drive, a crankshaft relative to a grinding tool, so that each pin on the crankshaft is ground with a high degree of precision. A locking mechanism, suc... | 12/23/1997 |
| 5697831 | Machine tool with plural tool spindles A circular grinding machine wherein a reciprocable carriage supports a first rotary tool spindle for a relatively large grinding wheel and the housing including the bearing for the first spindle mounts a carrier which is pivotable about the axis of the fi... | 12/16/1997 |
| 5655953 | Manufacturing method of wave cam for a compressor A wave cam is rotatably and integrally mounted on a drive shaft of a compressor. Pistons are connected to cam surfaces of the wave cam via shoes. The shoes move relatively to the cam surface along a predetermined orbital path. The predetermined orbital pa... | 08/12/1997 |
| 5616070 | Work drive orienting system for machine tool A work drive orienting system for a machine tool, such as a multiple belt grinder, comprises a head stock and a tail stock for supporting the workpiece to be machined, a locator retained by a spider in the head stock chuck, and a proximity sensor located ... | 04/01/1997 |
| 5549503 | Ophthalmic lens grinding machine A machine for grinding ophthalmic lenses includes a motor driven grinding wheel, a swinging head frame for holding ophthalmic lens and rotating the lenses into and out of contact with the grinding wheel, and a veneer positively connected to the swinging h... | 08/27/1996 |
| 5453037 | Process for grinding crankpins of a crankshaft and grinder for this purpose A process for successive grinding of crankpins of crankshaft by a grinder includes clamping the crankshaft at two spaced center journals thereof and rotating the crankshaft around the axis of a crankpin to be ground. To enable the maintenance of highly ac... | 09/26/1995 |
| 5392566 | Process and device for numerically controlled grinding of cams of a camshaft An apparatus and a method are disclosed for numerically controlled grinding of cams of a camshaft. The cams have a convex circular base section and a convex circular tip section with concave transitional sections interconnecting same. The concave transiti... | 02/28/1995 |
| 5323571 | Grinding machine for grinding tripods of constant velocity couplings A grinding machine for grinding tripods of constant velocity couplings allows execution of circular or elliptical profiles on each tripod stem. A piece holder has means for supporting the tripod, which means allows bringing into a working position a new s... | 06/28/1994 |
| 5209021 | Apparatus and method for sprue removal and grinding of railroad wheels An apparatus for grinding cast steel railroad wheels is provided. The apparatus comprises a railroad wheel support assembly that includes a roller assembly to receive and grasp the railroad wheel and rotate the railroad wheel about its center axis. A grin... | 05/11/1993 |
| 5101601 | Grinding workpieces Where a circumferential surface has to be ground on a workpiece and the workpiece is being rotated around an axis which is not concentric with the surface, both the grinding wheel axis and the workpiece rotation axis are displaced during the course of eac... | 04/07/1992 |
| 5074079 | Automatic adjusting device for revolution speed of rotary table of glass edge chamfering machine An automatic adjusting device for the revolution speed of the rotary table of a glass plate chamfering machine is disclosed. The device of the present invention is capable of adjusting the revolution speed of the rotary table to a slower or faster speed i... | 12/24/1991 |
| 5033237 | Method of numerically controlled profile grinding A method of numerically controlled grinding for forming a curved profile on a workpiece. A rotary grindstone having an arc-shaped grinding periphery. The rotating grindstone is moved along the target profile of the workpiece as keeping a constant attitude... | 07/23/1991 |
| 4945683 | Abrasive belt grinding machine Apparatus for grinding to predetermined contour a plurality of eccentric cams on a cam shaft, comprising abrasive belts supported adjacent the cam shaft for linear movement such that the belts grind the peripheries of the cams. The belts are guided along ... | 08/07/1990 |
| 4918862 | Method for grinding trochoidal and circular bearing races A method for grinding epitrochoidal, hypotrochoidal, and circular bearing races in one set-up without moving the part and insuring near perfect concentricity between all of the bearing races. A machine blank is mounted on an upper rotary table that is in ... | 04/24/1990 |
| 4912880 | Computerized tracing/edging system A computerized tracing/edging system for the edging of an ophthalmic lens comprises a tracing sub-system for performing a tracing operation with respect to a frame, a pattern or a lens to derive data relating to the dimensions thereof, a storing sub-syste... | 04/03/1990 |
| 4891914 | Computer controlled universal grinder and method for grinding trochoidal and circular bearing races A grinding machine for grinding epitrochoidal, hypotrochoidal, and circular bearing races in one set-up without having to move the part and to insure near perfect concentricity between all of the bearing races. A machine blank is mounted on an upper rotary tab... | 01/09/1990 |
