B21H 5/00
Making gear wheels , racks, spline shafts or worms
Official title: Making gear wheels {, racks, spline shafts or worms}
B21H5/00 (Making gear wheels , racks, spline shafts or worms) appears on 294 US grants and 139 published applications in this corpus.
Search patents in B21H- Granted patents
- 294
- Published applications
- 139
- Assignees
- 158
- Inventors
- 422
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 12 | 0 |
| 1988 | 10 | 0 |
| 1989 | 8 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 16 | 0 |
| 1999 | 17 | 0 |
| 2000 | 14 | 0 |
| 2001 | 10 | 4 |
| 2002 | 12 | 7 |
| 2003 | 5 | 6 |
| 2004 | 7 | 8 |
| 2005 | 3 | 4 |
| 2006 | 8 | 8 |
| 2007 | 3 | 5 |
| 2008 | 5 | 14 |
| 2009 | 3 | 7 |
| 2010 | 3 | 6 |
| 2011 | 4 | 5 |
| 2012 | 4 | 4 |
| 2013 | 7 | 4 |
| 2014 | 8 | 7 |
| 2015 | 3 | 4 |
| 2016 | 5 | 9 |
| 2017 | 3 | 3 |
| 2018 | 6 | 4 |
| 2019 | 6 | 4 |
| 2020 | 3 | 5 |
| 2021 | 5 | 4 |
| 2022 | 6 | 5 |
| 2023 | 4 | 4 |
| 2024 | 4 | 3 |
| 2025 | 1 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tool unit for a cold forming machine6 Jan 2026US 12,515,250 B2Osg Ex-Cell-O GmbH
- Method for manufacturing screw rotor12 Aug 2025US 12,383,966 B2Daikin Industries, Ltd.
- Apparatus and method for profiling workpieces by cold forming31 Dec 2024US 12,179,254 B2Ernst Grob AG
- Roll spinning forming device and method for toothed part31 Dec 2024US 12,179,255 B2South China University of Technology
- Method for manufacturing gear4 Jun 2024US 11,998,973 B2Aisin Corporation
- Manufacturing method of gear12 Feb 2026US 2026/0042140 A1Aisin Corporation
- Extruder screw5 Feb 2026US 2026/0034715 A1Leistritz Extrusionstechnik GmbH
- Cold forming machine23 Oct 2025US 2025/0326024 A1Osg Ex-Cell-O GmbH
- Rolling apparatus9 Oct 2025US 2025/0312834 A1Sanmei Works Co., Ltd.
- Method for manufacturing screw rotor, screw rotor, and screw compressor16 Jan 2025US 2025/0018458 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Method of spin forming and part made thereof77US 6,694,791 B1Hayes-Albion Corporation · 2004
- Apparatus and method for forming powder metal gears46US 6,517,772 B1Federal-Mogul World Wide, Inc. · 2003
- Toothed wheel for use in automobiles and its manufacturing method42US 5,310,432 AKubota Iron Works Co., Ltd. · 1994
- Torque transmitting structure and method of manufacture34US 5,384,949 AGeneral Motors Corporation · 1995
- Forming method and machine for splining power transmission members32US 3,982,415 AAnderson-Cook, Inc. · 1976