B23F
Making gears or toothed racks
Official title: MAKING GEARS OR TOOTHED RACKS (by stamping B21D; by rolling B21H; by forging or pressing B21K; by casting B22; arrangements for copying or controlling B23Q; machines or devices for grinding or polishing, in general B24B)
B23F (Making gears or toothed racks) appears on 1,369 US grants and 1,065 published applications in this corpus.
Search patents in B23F- Granted patents
- 1,369
- Published applications
- 1,065
- Assignees
- 483
- Inventors
- 1,957
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 24 | 0 |
| 1978 | 26 | 0 |
| 1979 | 17 | 0 |
| 1980 | 33 | 0 |
| 1981 | 21 | 0 |
| 1982 | 17 | 0 |
| 1983 | 17 | 0 |
| 1984 | 25 | 0 |
| 1985 | 31 | 0 |
| 1986 | 32 | 0 |
| 1987 | 28 | 0 |
| 1988 | 25 | 0 |
| 1989 | 22 | 0 |
| 1990 | 27 | 0 |
| 1991 | 26 | 0 |
| 1992 | 30 | 0 |
| 1993 | 19 | 0 |
| 1994 | 22 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 19 | 0 |
| 1998 | 16 | 0 |
| 1999 | 26 | 0 |
| 2000 | 14 | 0 |
| 2001 | 23 | 6 |
| 2002 | 20 | 18 |
| 2003 | 23 | 25 |
| 2004 | 10 | 20 |
| 2005 | 15 | 25 |
| 2006 | 18 | 23 |
| 2007 | 19 | 25 |
| 2008 | 18 | 27 |
| 2009 | 9 | 24 |
| 2010 | 14 | 32 |
| 2011 | 12 | 36 |
| 2012 | 26 | 53 |
| 2013 | 27 | 61 |
| 2014 | 39 | 43 |
| 2015 | 62 | 62 |
| 2016 | 54 | 66 |
| 2017 | 44 | 56 |
| 2018 | 55 | 79 |
| 2019 | 64 | 80 |
| 2020 | 57 | 72 |
| 2021 | 51 | 34 |
| 2022 | 43 | 51 |
| 2023 | 30 | 42 |
| 2024 | 38 | 41 |
| 2025 | 25 | 30 |
| 2026 | 15 | 34 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B23F 23/00Accessories or equipment combined with or arranged in, or specially designed to625
- B23F 21/00Tools specially adapted for use in machines for manufacturing gear teeth454
- B23F 19/00Finishing gear teeth by other tools than those used for manufacturing gear357
- B23F 5/00Making straight gear teeth involving moving a tool relatively to a workpiece354
- B23F 17/00Special methods or machines for making gear teeth, not covered by the186
- B23F 1/00Making gear teeth by tools of which the profile matches the profile137
- B23F 15/00Methods or machines for making gear wheels of special kinds not covered135
- B23F 9/00Making gears having teeth curved in their longitudinal direction126
Recent patents
- Method for grinding a workpiece with a toothing or a profile6 Oct 2026US 12,752,356 B2Kapp Niles GmbH & Co. KG
- Method for shaping a periodic structure, in particular a toothing, and lifting cam29 Sep 2026US 12,746,612 B2Gleason-Pfauter Maschinenfabrik GmbH
- Method for hard fine machining of two toothings on a workpiece, and gear cutting machine, control program, hard fine machining combination tools and sensor assembly therefor22 Sep 2026US 12,741,330 B2Gleason-Pfauter Maschinenfabrik GmbH
- Roller taper grinding method for planetary roller screw mechanism28 Jul 2026US 12,691,546 B2Chongqing University
- Near zero degrees cross-axis angle gear cutter and method of gear cutting using such a tool14 Jul 2026US 12,678,873 B2Eaton Intelligent Power Limited
- Gear chamfering method, chamfering tool, and chamfering tool manufacturing method8 Oct 2026US 2026/0307161 A1Osg Corporation
- Machine tool, control method, and control program1 Oct 2026US 2026/0295697 A1Dmg Mori Co., Ltd.
- Method for dressing a multi-thread grinding worm with a multi-groove dressing roll and method for grinding a gear using a multi-thread grinding worm1 Oct 2026US 2026/0295698 A1Kapp Niles GmbH & Co. KG
- Method for grinding a gear or a gear-shaped profile using a grinding worm and dressing tool1 Oct 2026US 2026/0295699 A1Kapp Niles GmbH & Co. KG
- Method for the continuous generating grinding of gears, and profiling method24 Sep 2026US 2026/0284762 A1Gleason Switzerland AG
Most cited
By later US patents
- Multi-axis bevel and hypoid gear generating machine65US 4,981,402 AThe Gleason Works · 1991
- Rotary ring cutter having coolant distribution and discharge means51US 5,290,135 AThe Gleason Works · 1994
- Compact machining center for multifunction46US 5,885,199 A1999
- Apparatus and method for forming powder metal gears46US 6,517,772 B1Federal-Mogul World Wide, Inc. · 2003
- Threaded grinding wheel and method of dressing41US 6,217,409 B1The Gleason Works · 2001