B30B 15/20
Controlling the speed of the ram
Official title: controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes
B30B15/20 (Controlling the speed of the ram) appears on 21 US grants and 11 published applications in this corpus.
Search patents in B30B- Granted patents
- 21
- Published applications
- 11
- Assignees
- 14
- Inventors
- 50
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 4 | 3 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Hydraulic system14 Nov 2023US 11,815,084 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic system1 Nov 2022US 11,486,416 B2Kawasaki Jukogyo Kabushiki Kaisha
- Servo hydraulic press3 May 2022US 11,318,697 B2Automation, Press and Tooling, AP & T AB
- High-low system for balers, compactors and transfer station compactors8 Mar 2022US 11,268,543 B1
- 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
- Electrohydrostatic system with pressure sensor26 Jan 2023US 2023/0026318 A1
- High-Low System for Balers, Compactors and Transfer Station Compactors24 Feb 2022US 2022/0056914 A1
- Hydraulic system13 Jan 2022US 2022/0010792 A1Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic system13 Jan 2022US 2022/0010817 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- Apparatus for synchronizing cylinder position in a multiple cylinder hydraulic press brake26US 4,797,831 ACincinnati Incorporated · 1989
- Method and device for controlling the stroke of a press machine23US 5,027,631 AAmada Company, Limited · 1991
- Method and device for controlling the stroke of a press machine21US 5,031,431 AAmada Company, Limited · 1991
- Method of controlling hydraulic press19US 5,071,603 AKabushiki Kaisha Kobe Seiko Sho · 1991
- Apparatus and method for controlling driving of a ram of a hydraulic cylinder of a hydraulic press equipment12US 5,682,742 ANisshinbo Industries, Inc. · 1997