B21H 5/027
By rolling using reciprocating flat dies
Official title: {by rolling using reciprocating flat dies, e.g. racks (B21H5/022 takes precedence)}
B21H5/027 (By rolling using reciprocating flat dies) appears on 84 US grants and 31 published applications in this corpus.
Search patents in B21H- Granted patents
- 84
- Published applications
- 31
- Assignees
- 37
- Inventors
- 99
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 10 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 3 |
| 2007 | 2 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 2 | 3 |
| 2017 | 0 | 1 |
| 2018 | 2 | 3 |
| 2019 | 1 | 2 |
| 2020 | 2 | 2 |
| 2021 | 4 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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- Tool manufacturing method and tools produced thereby12 Mar 2020US 2020/0078854 A1Flozfirm Technology Research Co., Ltd.
Most cited
By later US patents
- Forming method and machine for splining power transmission members32US 3,982,415 AAnderson-Cook, Inc. · 1976
- Apparatus and method for splining power transmission members20US 4,028,922 AAnderson-Cook, Inc. · 1977
- Apparatus for rolling a cylindrical blank16US 4,646,549 AN.H.K. Builder Co., Ltd. · 1987
- Thin-wall spline forming machine15US 4,380,918 AAnderson-Cook, Inc. · 1983
- Forming machine including drive mechanism having rack and gear synchronization13US 4,519,231 A1985