B25D 9/26
Control devices for adjusting the stroke of the piston or the force
Official title: Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof {(control systems adapted for earth drilling E21B44/00)}
B25D9/26 (Control devices for adjusting the stroke of the piston or the force) appears on 141 US grants and 89 published applications in this corpus.
Search patents in B25D- Granted patents
- 141
- Published applications
- 89
- Assignees
- 77
- Inventors
- 201
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 3 | 1 |
| 2005 | 2 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 2 | 2 |
| 2009 | 1 | 13 |
| 2010 | 6 | 2 |
| 2011 | 4 | 4 |
| 2012 | 3 | 1 |
| 2013 | 1 | 2 |
| 2014 | 3 | 7 |
| 2015 | 3 | 3 |
| 2016 | 5 | 10 |
| 2017 | 3 | 12 |
| 2018 | 9 | 4 |
| 2019 | 5 | 5 |
| 2020 | 5 | 6 |
| 2021 | 8 | 3 |
| 2022 | 3 | 2 |
| 2023 | 3 | 2 |
| 2024 | 3 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Percussion apparatus equipped with a pressure regulating device7 Jan 2025US 12,186,873 B2Montabert
- Impact piston device for a impact drill drive5 Nov 2024US 12,134,937 B2EURODRILL GmbH
- Hydraulic hammering device27 Aug 2024US 12,070,844 B2Furukawa Rock Drill Co., Ltd.
- Rotary-percussive hydraulic perforator provided with a stop piston and a braking chamber4 Jun 2024US 11,999,039 B2Montabert
- Pavement breaker29 Aug 2023US 11,739,481 B2Black & Decker Inc.
- Hydraulic Hammering Device7 May 2026US 2026/0125951 A1Furukawa Rock Drill Co., Ltd.
- Systems and methods for modulating pressure wave therapy23 Jan 2025US 2025/0029704 A1Djo, LLC
- Impact piston device for a impact drill drive9 Nov 2023US 2023/0358099 A1EURODRILL GmbH
- Percussion apparatus equipped with a pressure regulating device26 Oct 2023US 2023/0339087 A1Montabert
- Rotary-percussive hydraulic perforator provided with a stop piston and a braking chamber1 Sep 2022US 2022/0274242 A1Montabert
Most cited
By later US patents
- Hydraulic demolishing rock drill36US 4,474,248 A1984
- Control mechanism for a pneumatic tool29US 4,416,338 ASnap-on Tools Corporation · 1983
- Pneumatic hammer apparatus29US 5,119,667 A1992
- Handheld pneumatic power tool apparatus28US 5,515,930 AGlendo Corporation · 1996
- Hydraulic operated rock drilling apparatus27US 4,006,783 ALinden-Alimak AB · 1977