| Patents for B23F 13 - Making worms by methods essentially requiring the use of machines of the gear-cutting type (223) |
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| 12/13/1989 | CN2049163U Specialized tail stock |
| 11/15/1989 | EP0341485A1 Cutting method for the flanks of one part warms and one part a worm cutting machine |
| 11/02/1989 | WO1989010225A1 Process and machine for cutting flanks of one-piece endless screws |
| 08/02/1989 | EP0325579A1 Worm wheel and method of hobbing same. |
| 06/28/1989 | CN1033513A Method and numeric controlled machine-tool for processing variable envelope cambered surface teeth of worm |
| 09/21/1988 | CN87101936A Efficient machining method and relevant tool and equipment of enveloping worn gear pair, and multiple enveloping worm gear pair |
| 08/10/1988 | CN87101138A Involute inner engaged curved face worm and worm wheel and machining technology thereof |
| 07/13/1988 | CN87106991A Electrodynamic type inclination-changeable grinding head for plane second-order enveloping worm |
| 04/21/1988 | WO1988002829A1 Worm wheel and method of hobbing same |
| 04/14/1988 | DE3633656A1 Annular screw mechanism |
| 09/02/1987 | CN86206381U Worm processing apparatus |
| 08/04/1987 | US4683785 Method of cutting a worm screw and a worm screw obtained by the said method |
| 06/03/1987 | CN86205863U Grinding unit for concave tooth-profile of cylindrical worm |
| 05/20/1987 | CN86107189A Processing of ring surface-worm with envelop curved face |
| 05/06/1987 | CN85107847A Machining method for arc surface worm and spherical worm gear of high precision |
| 06/25/1986 | EP0185024A1 Apparatus and method for machining an enveloping-type worm screw |
| 05/13/1986 | US4588337 Apparatus and method for machining an enveloping-type worm screw |
| 09/26/1985 | WO1985004127A1 Apparatus and method for machining an enveloping-type worm screw |
| 10/09/1984 | US4475319 Process for machining a worm-type workpiece with a worm-type tool |
| 01/22/1980 | US4184796 Globoid worm gear generating method |
| 09/13/1977 | US4047449 Globoid worm gearing and method of making globoid worm thereof |
| 07/26/1977 | US4037365 Apparatus for cutting arcuately-shaped worms |
| 01/13/1976 | US3932077 Rotary interengaging worm and worm wheel with specific tooth shape |