| Patents for B23F 9 - Making gears having teeth curved in their longitudinal direction (668) |
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| 08/07/1991 | CN2082210U Hobbing machine used for processing sector gear of automobile steering device |
| 06/12/1991 | CN1012805B Method for precessing bevel gear with big helical angle at milling machine |
| 04/10/1991 | EP0421106A1 Duplex cut method for making generated spiral bevel gears of a bevel or hypoid gear drive |
| 03/19/1991 | US5000632 Duplex method of manufacturing a generated spiral-toothed bevel gear of a bevel-gear or hypoid-gear drive |
| 02/12/1991 | US4991353 Grinding machine for grinding pregeared bevel gears |
| 01/15/1991 | CA1278922C Machine and process for forming longitudinally curved tooth gears |
| 01/01/1991 | US4981402 Multi-axis bevel and hypoid gear generating machine |
| 12/13/1990 | DE3919127A1 Die forging process for spiral bevel gears - uses modified tooth geometry to allow simple extraction of gear forging from one-piece die |
| 11/21/1990 | CN1047137A Arc cylindrical gear (zerate) and working method |
| 08/28/1990 | US4951426 Grinding fluid feeder apparatus |
| 08/21/1990 | US4949456 Method of making ring gear and ring gear therefrom |
| 07/11/1990 | EP0377124A2 Improved method of making ring gear and ring gear therefrom |
| 07/06/1990 | CA2004671A1 Method of making ring gear and ring gear therefrom |
| 06/27/1990 | EP0374139A1 Multi-axis bevel and hypoid gear generating machine. |
| 06/26/1990 | EP0304432A4 Machine and process for forming longitudinally curved tooth gears. |
| 03/27/1990 | US4910922 Method of grinding the teeth of bevel gears having longitudinally curved teeth |
| 02/07/1990 | EP0353451A2 Device for producing a gear |
| 01/31/1990 | CN1039200A Technology for grinding tooth edge of helical tooth cylindrical gear |
| 09/07/1989 | DE3805665A1 Gear-cutting machine with CNC control for producing bevel gears |
| 08/31/1989 | DE3805360A1 Method of producing the rolling movement for the manufacture of tooth flanks on bevel gears |
| 03/09/1989 | WO1989001838A1 Multi-axis bevel and hypoid gear generating machine |
| 03/01/1989 | EP0304432A1 Machine and process for forming longitudinally curved tooth gears. |
| 02/01/1989 | CN1030713A Method for processing bevel gear with big helical angle at milling machine |
| 01/24/1989 | US4799337 Method of grinding the teeth of bevel gears having longitudinally curved teeth |
| 11/01/1988 | US4780990 Machine and process for forming longitudinally curved tooth gears |
| 08/23/1988 | US4765095 Method for grinding pregeared bevel gears |
| 12/17/1987 | WO1987007551A1 Machine and process for forming longitudinally curved tooth gears |
| 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 |
| 07/02/1987 | DE3643967A1 Method and machine for cutting helical bevel gears |
| 05/12/1987 | US4664569 Gear cutting method and machine for cutting spiral bevel gears and contrate gear face clutches |
| 04/28/1987 | EP0151107A4 Method of generating involute tooth forms with a milling cutter. |
| 12/09/1986 | US4627770 Gear cutter |
| 09/16/1986 | US4611956 Method for fabricating bevel and hypoid gear pairs |
| 08/19/1986 | US4606153 Method for controlling a grinding stroke in a gear tooth flank grinding machine operating on the indexing generating principle |
| 06/11/1986 | EP0184007A1 Gear-manufacturing machine for cutting spiral bevel gears and face gear couplings according to the continuous-cutting process |
| 01/21/1986 | US4565474 Method of generating involute tooth forms with a milling cutter |
| 01/14/1986 | CA1199208A1 Method of face mill generation of spiral bevel gears with integral central structure and resulting product |
| 08/14/1985 | EP0151107A1 Method of generating involute tooth forms with a milling cutter |
| 05/21/1985 | US4518287 Method of face mill generation of spiral bevel gears with integral central structure and resulting product |
| 04/30/1985 | US4514118 Method for fabricating gears |
| 02/13/1985 | EP0132582A1 Method of controlling the stroke of a generating tooth flank grinding machine |
| 01/22/1985 | CA1181277A1 Method of and apparatus for designing the tooth bearing of gears having an arcuate cycloid shape |
| 10/25/1984 | WO1984004064A1 Method of generating involute tooth forms with a milling cutter |
| 08/28/1984 | US4467567 Method of crown grinding gears having lengthwise curved teeth |
| 01/25/1984 | EP0099041A1 Method of face mill generation of spiral bevel gears with integral central structure and resulting product |
| 12/13/1983 | CA1158471A1 Method and cutter head for fabricating gears with lengthwise crowned teeth, use of the method and gears produced according to the method |
| 09/21/1983 | EP0088879A1 Method of shaping the bearing surface of cycloidally curved tooth gears, and end milling cutter for carrying out this method |
| 04/05/1983 | US4378660 Method of and means for grinding pairs of gear wheels as spiral or curved toothed bevel gear wheels |
| 01/04/1983 | US4367058 Bevolute gear system |
| 10/12/1982 | US4353671 Method for fabricating gears with generated tooth flanks |
| 09/15/1982 | EP0059992A1 Method and machine for manufacturing gears |
| 02/24/1982 | EP0046311A2 Method and cutter head for producing gear teeth with lengthwise ease-off |
| 06/23/1981 | CA1103460A1 Method of and means for grinding pairs of gear wheels as spiral or curved toothed bevel gear wheels |
| 04/14/1981 | US4261674 Gear cutting machine and method |
| 03/04/1981 | EP0024301A1 Process for manufacturing bevel and hypoid gear pairs |
| 02/18/1981 | EP0023983A1 Process for manufacturing gears with generated tooth flanks |
| 01/21/1981 | EP0022586A1 Method of crown grinding gears having longitudinally curved teeth and grinding head for performing this method |
| 09/30/1980 | US4224834 Mating spur gears |
| 07/08/1980 | US4211511 Method of manufacturing pairs of spur gears |
| 01/15/1980 | US4183703 Apparatus for manufacturing pairs of spur gears |
| 12/12/1978 | US4129028 Method and apparatus for working a hole |
| 11/14/1978 | CA1042248A1 Large gear manufacture |
| 05/23/1978 | US4090428 Apparatus for driving the generating or rolling cradle of a gear-cutting machine |
| 09/27/1977 | US4050353 Index generation method and machine for production of bevel gears |
| 02/15/1977 | US4007661 Gear cutting machine |
| 08/17/1976 | US3974595 Gear grinding machine for spiral bevel gears |
| 07/27/1976 | US3971293 Anti-backlash mechanism for generating train of gear cutting machine |
| 06/22/1976 | US3964369 Large gear manufacture |