B21D 41/028
Expandable mandrels
Official title: {expandable mandrels}
B21D41/028 (Expandable mandrels) appears on 53 US grants and 73 published applications in this corpus.
Search patents in B21D- Granted patents
- 53
- Published applications
- 73
- Assignees
- 51
- Inventors
- 127
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 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 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 2 | 4 |
| 2014 | 0 | 4 |
| 2015 | 1 | 5 |
| 2016 | 3 | 2 |
| 2017 | 6 | 3 |
| 2018 | 2 | 6 |
| 2019 | 3 | 7 |
| 2020 | 6 | 6 |
| 2021 | 7 | 6 |
| 2022 | 4 | 8 |
| 2023 | 7 | 7 |
| 2024 | 4 | 3 |
| 2025 | 5 | 7 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric pipe expander31 Mar 2026US 12,589,425 B2NAVAC Inc.
- Pipe expanding tool17 Mar 2026US 12,576,441 B2Makita Corporation
- Cold expansion pipe fitting, pipe connection, system, equipment, and method21 Oct 2025US 12,449,083 B2Uponor Innovation AB
- Expansion tool19 Aug 2025US 12,390,849 B2Milwaukee Electric Tool Corporation
- Baffle plate for a pipe expander12 Aug 2025US D1,088,072 S1NAVAC Inc. · Design
- Tube expansion tool1 Oct 2026US 2026/0295652 A1Makita Corporation
- Pex expansion tool17 Sep 2026US 2026/0273609 A1Milwaukee Electric Tool Corporation
- Pipe expander30 Jul 2026US 2026/0216780 A1Emerson Professional Tools (Shanghai) Co., Ltd.
- Tube expander5 Mar 2026US 2026/0061477 A1Zhejiang Prulde Electric Appliance Co., Ltd.
- Expansion tool9 Oct 2025US 2025/0312838 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Method of making an off-wall spacer cage38US 9,364,284 B2Boston Scientific Scimed, Inc. · 2016
- Tubing expander apparatus36US 4,494,398 AMidas International Corporation · 1985
- Expander for tubular elements12US 8,511,133 B12013
- PEX expanding tool7US 9,975,289 B2Black & Decker Inc. · 2018
- Hydraulic tube expander and method of use7US 9,987,672 B2Irwin Industrial Tool Company · 2018