B23B 31/20
Longitudinally-split sleeves
Official title: Longitudinally-split sleeves, e.g. collet chucks
B23B31/20 (Longitudinally-split sleeves) appears on 628 US grants and 452 published applications in this corpus.
Search patents in B23B- Granted patents
- 628
- Published applications
- 452
- Assignees
- 329
- Inventors
- 914
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 10 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 10 | 0 |
| 1986 | 10 | 0 |
| 1987 | 15 | 0 |
| 1988 | 12 | 0 |
| 1989 | 15 | 0 |
| 1990 | 6 | 0 |
| 1991 | 12 | 0 |
| 1992 | 13 | 0 |
| 1993 | 7 | 0 |
| 1994 | 15 | 0 |
| 1995 | 15 | 0 |
| 1996 | 7 | 0 |
| 1997 | 11 | 0 |
| 1998 | 14 | 0 |
| 1999 | 27 | 0 |
| 2000 | 18 | 0 |
| 2001 | 24 | 8 |
| 2002 | 9 | 9 |
| 2003 | 17 | 12 |
| 2004 | 7 | 17 |
| 2005 | 13 | 21 |
| 2006 | 10 | 22 |
| 2007 | 13 | 18 |
| 2008 | 13 | 12 |
| 2009 | 7 | 11 |
| 2010 | 8 | 19 |
| 2011 | 7 | 15 |
| 2012 | 8 | 11 |
| 2013 | 6 | 17 |
| 2014 | 23 | 23 |
| 2015 | 14 | 14 |
| 2016 | 15 | 31 |
| 2017 | 25 | 18 |
| 2018 | 16 | 22 |
| 2019 | 18 | 27 |
| 2020 | 15 | 24 |
| 2021 | 25 | 32 |
| 2022 | 18 | 14 |
| 2023 | 11 | 16 |
| 2024 | 8 | 15 |
| 2025 | 10 | 12 |
| 2026 | 15 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modular hydraulic chucks4 Aug 2026US 12,697,662 B2Kennametal Inc.
- Multiple connection drive shaft14 Jul 2026US 12,678,177 B2Medtronic PS Medical, Inc.
- Gripping device for holding, centring and/or collet-clamping a micromechanical or horological component7 Jul 2026US 12,673,373 B2ETA SA Manufacture Horlogere Suisse
- Fixation device for surgical instrument parts19 May 2026US 12,631,205 B2Stryker European Operations Limited
- Tool holder having a cylindrical fixation bore extending rearwardly from a front fixation surface and a fastening bore intersecting the front fixation surface12 May 2026US 12,623,293 B2Iscar, Ltd.
- Bar contact improvement1 Oct 2026US 2026/0295683 A1
- Fastening and coupling apparatus for a rotating tool, and power tool having a fastening and coupling apparatus of this type1 Oct 2026US 2026/0295684 A1C. & E. Fein GmbH
- Machine tool20 Aug 2026US 2026/0241463 A1Star Micronics Co., Ltd.
- Tool holder with groove ring20 Aug 2026US 2026/0241464 A1Albrecht Praezision GmbH & Co. KG
- Guide Bushing System20 Aug 2026US 2026/0241465 A1JBS System GMBH
Most cited
By later US patents
- Resecting tool with independent variable axial extension for tool implements and guide sleeves134US 6,209,886 B1Medtronic, Inc. · 2001
- Tool collet and control means118US 4,441,563 ABlack & Decker Inc. · 1984
- Dead length collect chuck assembly118US 5,855,377 A1999
- Hydraulic chuck111US 5,156,043 AAir-Mo Hydraulics, Inc. · 1992
- End mill chucking structure46US 6,394,466 B1Nikken Kosakusho Works Ltd. · 2002