B21J 7/28
Operated by hydraulic or liquid pressure
Official title: operated by hydraulic or liquid pressure
B21J7/28 (Operated by hydraulic or liquid pressure) appears on 28 US grants and 21 published applications in this corpus.
Search patents in B21J- Granted patents
- 28
- Published applications
- 21
- Assignees
- 17
- Inventors
- 51
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 2 |
| 2004 | 2 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 2 |
| 2021 | 1 | 3 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 3 |
| 2025 | 3 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods of material forming and/or cutting28 Apr 2026US 12,611,706 B2Cell Impact AB
- Hydraulic forming machine for pressing workpieces, in particular forging hammer, and method for operating a hydraulic forming machine, in particular a forging hammer14 Apr 2026US 12,599,954 B2Langenstein & Schemann GmbH
- Material forming20 May 2025US 12,303,968 B2Cell Impact AB
- Apparatus and a method for material forming by impact13 May 2025US 12,296,376 B2Cell Impact AB
- Methods of, and apparatuses for, material forming11 Feb 2025US 12,220,741 B2Cell Impact AB
- Hydraulic Forming Machine for Workpiece Forming, Hydraulic Control Unit and Method for Controlling a Hydraulic Cylinder of a Hydraulic Forming Machine6 Mar 2025US 2025/0073774 A1
- Material forming8 Aug 2024US 2024/0261848 A1Cell Impact AB
- Hot forming a cast forging ingot27 Jun 2024US 2024/0207922 A1GFM GmbH
- Hydraulic forming machine for pressing workpieces, in particular forging hammer, and method for operating a hydraulic forming machine, in particular a forging hammer30 May 2024US 2024/0173765 A1Langenstein & Schemann GmbH
- An apparatus and a method for material forming by imp act9 Nov 2023US 2023/0356286 A1Cell Impact AB
Most cited
By later US patents
- Liquid inertia tool19US 4,484,638 A1984
- Method, impact machine, and equipment included in an impact machine15US 6,871,524 B2Morphic Technologies Aktiebolag (publ) · 2005
- Fluid operable hammer9US 4,150,603 AJoy Manufacturing Company · 1979
- Double-acting forging hammer and method8US 4,796,428 AOilgear Towler, Inc. · 1989
- Hammer6US 4,261,249 AJoy Manufacturing Company · 1981