B23F 5/20
Making straight gear teeth involving moving a tool relatively to a workpiece
Official title: by milling
B23F5/20 (Making straight gear teeth involving moving a tool relatively to a workpiece) appears on 112 US grants and 102 published applications in this corpus.
Search patents in B23F- Granted patents
- 112
- Published applications
- 102
- Assignees
- 74
- Inventors
- 221
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 4 |
| 2008 | 2 | 2 |
| 2009 | 3 | 3 |
| 2010 | 0 | 3 |
| 2011 | 2 | 2 |
| 2012 | 0 | 5 |
| 2013 | 1 | 10 |
| 2014 | 3 | 7 |
| 2015 | 6 | 8 |
| 2016 | 13 | 11 |
| 2017 | 6 | 9 |
| 2018 | 13 | 5 |
| 2019 | 5 | 5 |
| 2020 | 3 | 8 |
| 2021 | 4 | 5 |
| 2022 | 6 | 5 |
| 2023 | 5 | 2 |
| 2024 | 3 | 3 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B23F 5/22The tool being a hob for making spur gears63
- B23F 5/202The tool having a shape similar to that of a gear or14
- B23F 5/205With plural tools14
- B23F 5/24The tool being a hob for making bevel gears8
- B23F 5/26The tool having the same profile as a tooth or teeth of2
- B23F 5/27The tool having the same profile as a tooth or teeth of0
Recent patents
- Method of forming spline gears and assembling a dual spline gear23 Sep 2025US 12,420,347 B1Prince Mohammad Bin Fahd University
- Gear machining apparatus8 Jul 2025US 12,350,749 B2Jtekt Corporation
- Worm gear machine19 Nov 2024US 12,145,208 B2Chongqing University
- Power transmission shaft and method for manufacturing the same1 Oct 2024US 12,104,652 B2Hitachi Astemo, Ltd.
- Method for machining the tip circle diameter and a tool for producing a gearwheel9 Jul 2024US 12,030,130 B2Präwema Antriebstechnik GmbH
- Gear part machining method, non-transitory computer-readable recording medium, and machining apparatus16 Jul 2026US 2026/0199993 A1Yamazaki Mazak Corporation
- Manufacture of differential gears26 Dec 2024US 2024/0424584 A1The Gleason Works
- Machine and process for forming an axle shaft19 Dec 2024US 2024/0416442 A1Federal Screw Works
- Method for producing a milling tool, milling tool, and method for producing gear teeth by milling using a milling tool of this kind28 Nov 2024US 2024/0391005 A1Adelbert Haas GmbH
- Method for machining toothing systems24 Aug 2023US 2023/0264281 A1Gleason-Pfauter Maschinenfabrik GmbH
Most cited
By later US patents
- Method of generating involute tooth forms with a milling cutter33US 4,565,474 AThe Ingersoll Milling Machine Company · 1986
- Gear cutter24US 4,329,096 APower Engineering and Manufacturing, Ltd. · 1982
- Crowned involute splines and method of making17US 4,132,090 AEaton Corporation · 1979
- Gear hobbing machine16US 5,228,814 AThe Gleason Works · 1993
- Method and apparatus for the synchronization of a gear machining apparatus14US 4,253,050 AReishauer AG · 1981