B23B 2231/28
Dust covers
B23B2231/28 (Dust covers) appears on 18 US grants and 26 published applications in this corpus.
Search patents in B23B- Granted patents
- 18
- Published applications
- 26
- Assignees
- 16
- Inventors
- 42
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 3 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 3 |
| 2018 | 3 | 1 |
| 2019 | 3 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 2 |
| 2022 | 0 | 3 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dust protection cap with vibration decoupling9 Dec 2025US 12,491,566 B2Hilti Aktiengesellschaft
- Sealing lip on tool fitting28 Oct 2025US 12,454,015 B2Hilti Aktiengesellschaft
- Chuck for machine tool and sealing system10 Jan 2023US 11,548,076 B2Pratt & Whitney Canada Corp.
- Chip/dust prevention cover, chip/dust prevention cover set, chuck mechanism, and machine tool23 Mar 2021US 10,953,475 B2Synthe Tech Inc.
- Lug nut removal tool4 Feb 2020US 10,549,355 B1
- Hand-held straight grinder7 Nov 2024US 2024/0367279 A1Suzhou Creationspace Intelligent Technology Co.,Ltd.
- Workpiece clamping device and machine tool28 Dec 2023US 2023/0415242 A1Fuji Corporation
- Protective device for drill chuck having a mixed gasket with independent moving fins23 Mar 2023US 2023/0090197 A1Invnobel S A S
- Sealing lip on tool fitting10 Nov 2022US 2022/0355389 A1Hilti Aktiengesellschaft
- Dust-proof mechanism of chuck, and chuck16 Jun 2022US 2022/0184712 A1Howa Machinery, Ltd.
Most cited
By later US patents
- Drill chuck36US 6,581,942 B2Rohm Co., Ltd. · 2003
- Drill mount32US 3,984,192 ARobert Bosch GmbH · 1976
- Drill chuck with front-end shield26US 6,860,488 B2Rohm Co., Ltd. · 2005
- Device usable as gripper head or chuck14US 8,403,338 B2Roehm GmbH · 2013
- Centering drill chuck8US 7,243,923 B2Black & Decker Inc. · 2007