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| Number | Title | Issue Date |
| 5228814 | Gear hobbing machine Disclosed herein is a hobbing machine particularly for the production of spur and helical gears. The hobbing machine is characterized in that a separate mechanism for hob shifting is not required. The hob shifting, as well as other machine motions, is car... | 07/20/1993 |
| 4850155 | Method for machining gearwheels A method is described for hob grinding helical gearwheels by continuous diagonal hobbing using a tool in the form of a substantially involute worm whose active length is greater than the length of the working area and whose center distance from the gearwh... | 07/25/1989 |
| 4765095 | Method for grinding pregeared bevel gears A method and device for grinding pregeared bevel gears in which the grinding of both flanks of the tooth gap is performed in a single setting and by a single tool in a hobbing process. The grinding machine is provided with a truing device which is rigidly... | 08/23/1988 |
| 4635404 | Apparatus for machining a spur gear by means of a rotating gearlike tool In a process for machining a spur gear by using a grinding worm having a curved tooth thickness smaller than the final measurement of the curved tooth gap of the spur gear to be produced, the grinding worm is first directed radially towards the spur gear ... | 01/13/1987 |
| 4414495 | Synchronism equipment for gear cutting machines Apparatus for synchronizing the rotating cutter and rotating workpiece of a gear cutting machine, featuring, in one aspect, correcting synchronism errors due to the time lag between application of a command signal and a corresponding movement of the workp... | 11/08/1983 |
| 4215959 | Drive train for gear manufacturing machine A gear manufacturing machine which includes an endless chain for carrying a series of stock removing tools is provided with a versatile drive train system which can be adjusted for different methods of gear manufacture. The drive train system includes cou... | 08/05/1980 |
| 4208155 | Gear cutting machine with a hob Gear cutting apparatus comprises a hob 9 carried by a radial slide 1 and an axial slide 16, which are moved by independent d.c. motors 20 and 17. A main variable-speed motor 2 on the radial slide 1 is kinematically connected to the hob 9 and to a turntabl... | 06/17/1980 |
| 4203258 | Gear finishing machine In a gear finishing or other machine having a base, a table support mounting a reciprocal table having a head stock and a tail stock for supporting a workpiece gear or spline to be finished, a pedestal on the base mounting a motor-operated transmission an... | 05/20/1980 |
| 4109362 | Method of making screw rotor machine rotors Screw rotors for a screw compressor or expander incorporating improved screw profiles on both male and female rotors wherein certain mating portions of the two rotor screws have involute profiles to provide conjugate action of these screw portions with mi... | 08/29/1978 |
| 3971293 | Anti-backlash mechanism for generating train of gear cutting machine The invention overcomes undesirable backlash effects in gear generators which cut gears by climb milling (i.e., with cutter blades rotating in the same direction as the work), these undesirable backlash effects being initiated by the intermittent cutting ... | 07/27/1976 |
