| Patents for B23F 21 - Tools specially adapted for use in machines for manufacturing gear teeth (1,733) |
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| 06/12/1991 | EP0431746A1 Milling cutters |
| 06/04/1991 | US5020279 Machine tool for manufacture and dressing of tools and for finish-machining of gear wheels |
| 04/24/1991 | EP0423914A1 Gear type tool |
| 04/18/1991 | WO1991004830A1 Mainrotor machining process and apparatus |
| 04/16/1991 | US5007773 Shaving cutter |
| 03/29/1991 | WO1991004819A1 Hob for generating face gears |
| 03/13/1991 | EP0416144A1 Grinding tool |
| 03/13/1991 | CN1049813A Circular arc gear hob and gear without runing-in tolerance |
| 02/06/1991 | EP0411253A2 Method for manufacturing grinding or similar tools covered with extremely hard abrasive grains, in particular for finishing gear wheels and tools obtainable by this process. |
| 01/16/1991 | CN2069325U Hobbing cutter electric spark reinforced jig |
| 01/15/1991 | CA1278922C Machine and process for forming longitudinally curved tooth gears |
| 01/10/1991 | DE3920483A1 Raeummaschine Broaching Machine |
| 01/02/1991 | EP0405175A1 Tool for chip cutting workpieces |
| 12/29/1990 | CA2018948A1 Tool for machining workpieces |
| 12/27/1990 | WO1990015685A1 Broaching machine |
| 12/27/1990 | EP0126096B1 Improved cutter and method for gear manufacture |
| 11/22/1990 | EP0203085B1 Cutting tool and method of manufacture |
| 11/20/1990 | US4971602 Method for grinding gear teeth |
| 11/20/1990 | US4971487 Method for cutting involute gears |
| 11/13/1990 | US4969371 Gear type flexible coupling |
| 10/09/1990 | US4961289 Machine tool for fine machining the tooth flanks of pretoothed gearwheels |
| 09/19/1990 | CN2062265U Short straight edge rotary scraping hobbing cutter |
| 09/19/1990 | CN1045363A Hobbing cutter for straight-tooth bevel gear |
| 09/12/1990 | CN1045241A Design for large diameter worm and worm gear and its hobbing method |
| 09/04/1990 | US4954028 Process for making, finishing crown wheels |
| 09/04/1990 | US4954027 Process for the discontinuous profile grinding or profile milling of gear wheels |
| 08/21/1990 | US4949513 Method for the precision machining of particularly hardened gears and a tool suited therefor |
| 08/15/1990 | CN1009174B Gear cutting hob |
| 06/26/1990 | EP0304432A4 Machine and process for forming longitudinally curved tooth gears. |
| 06/06/1990 | EP0371235A2 Inserted blade hob |
| 04/25/1990 | EP0364975A1 Hobbing tool for finishing gears |
| 04/11/1990 | EP0362388A1 Method of making an abrasive geared instrument and method of using it for finishing |
| 03/27/1990 | US4910922 Method of grinding the teeth of bevel gears having longitudinally curved teeth |
| 03/15/1990 | DE3829604A1 Hobbing cutter and method of producing tooth systems |
| 03/14/1990 | EP0357772A1 Hob cutter for cutting involute gear |
| 02/27/1990 | US4904129 Annular milling cutter for machining bevel gear |
| 01/31/1990 | EP0352335A1 Method of determining longitudinal and profile modifications to a tool tooth surface |
| 01/03/1990 | EP0348525A1 Machine tool for making and trimming of instruments and finishing of gears |
| 11/14/1989 | US4880337 Machine cutter |
| 10/04/1989 | CN2045343U Tool for processing gear wheel with special short tooth |
| 10/04/1989 | CN1035973A Shape repair grinding method of gear shaving cutter blade |
| 08/30/1989 | EP0330289A1 A process for the making and/or finishing of crown wheels |
| 08/29/1989 | CA1258763A2 Gear cutter assembly |
| 08/09/1989 | CN2042387U Accretion type tipped gear shaver |
| 07/25/1989 | US4850760 Method of finishing gears |
| 07/25/1989 | US4850155 Method for machining gearwheels |
| 07/18/1989 | US4848976 Laminated gear shaving tools |
| 07/18/1989 | US4848040 Apparatus for grinding shaving cutter teeth, and method of same |
| 07/12/1989 | EP0323868A1 Process for producing a crown wheel |
| 06/29/1989 | WO1989005705A1 Method of determining longitudinal and profile modifications to a tool tooth surface |
| 06/29/1989 | WO1989005704A1 Method of making an abrasive geared instrument and method of using it for finishing |
| 06/29/1989 | WO1989005703A1 Machine tool for making and trimming of instruments and finishing of gears |
| 06/28/1989 | EP0322079A1 Tool for cutting gear wheels, and a method for resharpening said tool after wear |
| 06/13/1989 | CA1255488A1 Gear cutter assembly |
| 06/07/1989 | CN2038825U Worm-type gear-shaving cutter with laminated structure |
| 05/02/1989 | US4825715 Gear transmission and method of machining its teeth |
| 04/20/1989 | DE3732091A1 Single position hob |
| 04/06/1989 | DE3731057A1 Tooth system for shafts, gears, coupling parts, hubs or the like |
| 03/23/1989 | WO1989002330A1 Hob cutter for cutting involute gear |
| 03/22/1989 | CN1031809A Gear cutting hob |
| 03/15/1989 | EP0306549A1 Improvements to the method of attaching removable cutting blades to machine cutters |
| 03/01/1989 | EP0304432A1 Machine and process for forming longitudinally curved tooth gears. |
| 02/22/1989 | CN2032921U Carbon nitrogen permeating gear splined hole push-type broach device |
| 01/24/1989 | US4799337 Method of grinding the teeth of bevel gears having longitudinally curved teeth |
| 12/06/1988 | CA1245843A1 Cutting tool and method of manufacture |
| 11/15/1988 | US4784538 Disposable disk cutter |
| 11/01/1988 | US4780990 Machine and process for forming longitudinally curved tooth gears |
| 09/28/1988 | EP0203085A4 Cutting tool and method of manufacture. |
| 09/21/1988 | CN87101936A Efficient machining method and relevant tool and equipment of enveloping worn gear pair, and multiple enveloping worm gear pair |
| 09/14/1988 | EP0282046A2 Machine tool for finishing the tooth flanks of roughly cut gears |
| 08/24/1988 | CN87101425A 三合一滤器 Triple filter |
| 08/23/1988 | US4765782 Cutter |
| 08/17/1988 | EP0278512A1 Method for the machining of gears |
| 06/22/1988 | EP0271844A2 Gear transmission with variable pressure angle and method of machining gear tooth profiles with a variable pressure angle |
| 05/05/1988 | DE3626087C1 Hob for spur wheels used in precision mechanisms and intended for the head-first cutting method |
| 04/14/1988 | DE3633656A1 Annular screw mechanism |
| 04/05/1988 | US4735115 Method for manufacturing throw-away hob |
| 04/05/1988 | CA1234776A1 Disordered coating and method |
| 03/24/1988 | DE3630912A1 Hobbing cutter with regulated tooth thickness |
| 03/23/1988 | CN87210967U Assembly superhard material gear shaver with single-adge |
| 02/03/1988 | CN87200736U Adjustable laminating disks type radial gear shaving cutter |
| 02/02/1988 | US4722238 Rack and pinion gear |
| 01/27/1988 | CN87200739U Shaving-lapping wheel with slots on tooth faces |
| 01/19/1988 | US4720220 Tool for machining tooth flanks and method of finishing tooth flanks |
| 12/29/1987 | US4716083 Disordered coating |
| 12/17/1987 | WO1987007551A1 Machine and process for forming longitudinally curved tooth gears |
| 12/15/1987 | CA1230249A1 Method of finishing gears |
| 12/05/1987 | CN86208689U Assembling gear scraping hob made from hard alloy |
| 10/22/1987 | DE3710303A1 Grinding body, in particular a double-taper grinding body |
| 10/06/1987 | US4697387 Device for grinding tooth profiles of a rotating toothed workpiece |
| 09/15/1987 | US4693231 Gearlike, abrasive precision working tool, a method for dressing of such a tool and a dressing tool for dressing the tool |
| 07/29/1987 | EP0229894A2 Method for grinding the toothing of bevel gears having teeth curved in their longitudinal direction as well as tool and device for carrying out the method |
| 07/15/1987 | EP0228436A1 Laminated gear shaving tools |
| 06/16/1987 | US4673317 Shaper cutter with replaceable cutting wafer |
| 06/09/1987 | US4671709 Pot broach |
| 05/19/1987 | CA1221862A1 Cutter and method for gear manufacture |
| 05/06/1987 | EP0088770B1 Improved rotary tool for straddle grinding |
| 04/09/1987 | DE3535079A1 High-duty hobbing cutter |
| 03/18/1987 | EP0214411A2 Method of generating-grinding with indexing by a curved generating cut |
| 03/04/1987 | EP0212860A2 Disposable disk cutter |