B23B 31/39
Jaw changers
B23B31/39 (Jaw changers) appears on 32 US grants and 20 published applications in this corpus.
Search patents in B23B- Granted patents
- 32
- Published applications
- 20
- Assignees
- 20
- Inventors
- 50
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 2 |
| 2021 | 1 | 4 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Changer device for clamping heads3 Mar 2026US 12,564,887 B2Hainbuch GmbH Spannende Technik
- Automatic jig replacement system10 Feb 2026US 12,544,873 B2Kitagawa Iron Works Co., Ltd.
- Jaw exchanger and machine tool15 Jul 2025US 12,358,057 B2Yamazaki Mazak Corporation
- Chuck-claw guide structure and chuck-claw insertion method28 May 2024US 11,992,885 B2Howa Machinery, Ltd.
- Chuck-claw guide structure and chuck-claw insertion method23 Apr 2024US 11,964,331 B2Howa Machinery, Ltd.
- Changer device for clamping heads14 Mar 2024US 2024/0082928 A1Hainbuch GmbH Spannende Technik
- Automatic jig replacement system30 Nov 2023US 2023/0381907 A1Kitagawa Iron Works Co., Ltd.
- Jaw exchanger and machine tool8 Dec 2022US 2022/0388076 A1Yamazaki Mazak Corporation
- Chuck-claw guide structure and chuck-claw insertion method9 Dec 2021US 2021/0379674 A1Howa Machinery, Ltd.
- Chuck-claw coupling mechanism9 Dec 2021US 2021/0379676 A1Howa Machinery, Ltd.
Most cited
By later US patents
- Workholder12US 4,550,922 AThe S-P Manufacturing Corporation · 1985
- Arrangement for automatically changing clamping jaws of the chuck of a machine tool10US 4,313,252 AGildemeister Aktiengesellschaft · 1982
- Device for changing chuck attachment jaws10US 4,644,636 AIndex-Werke Komm.-Ges. Hahn & Tessky · 1987
- Workholder10US 4,685,687 AThe S-P Manufacturing Corporation · 1987
- Arrangement for automatically changing the clamping jaws of the chuck of a machine tool8US 4,100,671 AGildemeister Aktiengesellschaft · 1978