B23B 31/40
Expansion mandrels
B23B31/40 (Expansion mandrels) appears on 285 US grants and 200 published applications in this corpus.
Search patents in B23B- Granted patents
- 285
- Published applications
- 200
- Assignees
- 182
- Inventors
- 505
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 10 | 0 |
| 1984 | 2 | 0 |
| 1985 | 9 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 3 |
| 2002 | 5 | 4 |
| 2003 | 5 | 4 |
| 2004 | 4 | 6 |
| 2005 | 5 | 10 |
| 2006 | 6 | 15 |
| 2007 | 7 | 10 |
| 2008 | 5 | 9 |
| 2009 | 4 | 5 |
| 2010 | 8 | 8 |
| 2011 | 6 | 3 |
| 2012 | 1 | 7 |
| 2013 | 8 | 7 |
| 2014 | 3 | 9 |
| 2015 | 8 | 12 |
| 2016 | 7 | 12 |
| 2017 | 17 | 11 |
| 2018 | 9 | 9 |
| 2019 | 8 | 7 |
| 2020 | 7 | 5 |
| 2021 | 8 | 11 |
| 2022 | 9 | 8 |
| 2023 | 7 | 6 |
| 2024 | 2 | 12 |
| 2025 | 1 | 4 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B23B 31/4006Gripping the work or tool by a split sleeve117
- B23B 31/4073Gripping the work or tool between planes almost perpendicular to the axis62
- B23B 31/404Gripping the work or tool by jaws moving radially controlled by conical44
- B23B 31/42Characterised by features relating primarily to remote control of the gripping means18
- B23B 31/408Work or tool supported by two conical surfaces7
- B23B 31/4093Tube supporting means including a centerhole7
- B23B 31/4086Work or tool gripped by a roller movable on an inclined plane1
Recent patents
- Mandrel assembly for use with a rotary tool4 Aug 2026US 12,697,663 B2Robert Bosch GmbH
- Oscillating multi-tool system21 Jul 2026US 12,686,145 B2Milwaukee Electric Tool Corporation
- Mandrel assembly for use with a rotary tool12 May 2026US 12,623,295 B2Robert Bosch GmbH
- Flow-forming machine and method for flow-forming31 Mar 2026US 12,589,426 B2Leifeld Metal Spinning AG
- Method for gripping constant-velocity universal joint component13 Jan 2026US 12,521,831 B2Ntn Corporation
- Tool holder16 Jul 2026US 2026/0199988 A1PCM Precision Tooling SA
- Oscillating multi-tool system30 Apr 2026US 2026/0115961 A1Milwaukee Electric Tool Corporation
- Steam turbine seal ring finishing apparatus and method of use1 Jan 2026US 2026/0001146 A1GE Infrastructure Technology LLC
- Ram clamping system16 Oct 2025US 2025/0319526 A1Adelbert Haas GmbH
- Clamping ram and method for producing a clamping ram16 Oct 2025US 2025/0319558 A1Adelbert Haas GmbH
Most cited
By later US patents
- Fiber delivery apparatus and system having a creel and fiber placement head with polar axis of rotation95US 8,534,338 B2Ingersoll Machine Tools, Inc. · 2013
- Mechanism for varying the finger grip area of a writing implement46US 4,035,089 A1977
- Clamping tool for non-positive and high-precision clamping of workpieces40US 5,197,720 ADaimler-Benz Aktiengesellschaft · 1993
- Cutter disc arbor particularly for dividing machines37US 5,107,737 ASelco S.r.l. · 1992
- Hydraulic chuck device for engagement with the inside of a tube34US 4,393,674 AAir-Mo Hydraulics, Inc. · 1983