B25B 21/008
Portable power-driven screw or nut setting or loosening tools: with automatic change-over
Official title: {with automatic change-over from high speed-low torque mode to low speed-high torque mode}
B25B21/008 (Portable power-driven screw or nut setting or loosening tools: with automatic change-over) appears on 144 US grants and 137 published applications in this corpus.
Search patents in B25B- Granted patents
- 144
- Published applications
- 137
- Assignees
- 53
- Inventors
- 264
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 1 | 6 |
| 2010 | 3 | 3 |
| 2011 | 5 | 7 |
| 2012 | 2 | 9 |
| 2013 | 8 | 12 |
| 2014 | 6 | 6 |
| 2015 | 10 | 6 |
| 2016 | 5 | 10 |
| 2017 | 3 | 2 |
| 2018 | 7 | 10 |
| 2019 | 8 | 8 |
| 2020 | 4 | 8 |
| 2021 | 9 | 5 |
| 2022 | 7 | 9 |
| 2023 | 9 | 15 |
| 2024 | 7 | 5 |
| 2025 | 8 | 8 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power tool with deployable appendage28 Jul 2026US 12,691,555 B2
- Torque output tool28 Jul 2026US 12,691,563 B2Nanjing Chervon Industry Co., Ltd.
- Systems and methods for customizing fastener tightness20 Jan 2026US 12,528,163 B2
- Apparatus for tightening threaded fasteners30 Dec 2025US 12,508,695 B2HYTORC Division UNEX Corporation
- Power tool and control method therefor30 Sep 2025US 12,427,631 B2Nanjing Chervon Industry Co., Ltd.
- Power tool with deployable appendage17 Sep 2026US 2026/0273704 A1
- Devices, Systems and Methods for Driving Fasteners and Confirming Fastening Conditions28 May 2026US 2026/0145308 A1
- Configuration of tightening tool30 Apr 2026US 2026/0115872 A1Atlas Copco Industrial Technique AB
- Power tool with automatic shifting mechanism29 Jan 2026US 2026/0027681 A1Milwaukee Electric Tool Corporation
- Powered ratchet tool with a variable crankshaft4 Dec 2025US 2025/0367797 A1
Most cited
By later US patents
- Power tool having rotary input control1,053US 9,475,180 B2Black & Decker Inc. · 2016
- Apparatus for controlling nut runner1,041US 5,062,491 AHonda Giken Kogyo Kabushiki Kaisha · 1991
- Automatic variable transmission for power tool119US 5,897,454 ABlack & Decker Inc. · 1999
- Rotary impact tool90US 8,678,106 B2Makita Corporation · 2014
- Power tool for two-step tightening of screw joints70US 5,203,242 A1993