F04B 47/14
Counterbalancing
F04B47/14 (Counterbalancing) appears on 66 US grants and 43 published applications in this corpus.
Search patents in F04B- Granted patents
- 66
- Published applications
- 43
- Assignees
- 28
- Inventors
- 89
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 2 |
| 2015 | 3 | 3 |
| 2016 | 0 | 7 |
| 2017 | 0 | 3 |
| 2018 | 5 | 4 |
| 2019 | 8 | 6 |
| 2020 | 5 | 1 |
| 2021 | 7 | 5 |
| 2022 | 2 | 0 |
| 2023 | 4 | 2 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Long-stroke pumping unit30 Sep 2025US 12,429,046 B2Weatherford Technology Holdings, LLC
- Hydraulic pumping system29 Jul 2025US 12,372,080 B2
- Long-stroke pumping unit15 Oct 2024US 12,116,992 B2Weatherford Technology Holdings, LLC
- Long-stroke pumping unit10 Oct 2023US 11,781,543 B2Weatherford Technology Holdings, LLC
- Decoupled long stroke pump19 Sep 2023US 11,761,317 B2Halliburton Energy Services.Inc.
- Long-stroke pumping unit9 Jan 2025US 2025/0012268 A1Weatherford Technology Holdings, LLC
- Hydraulic pumping system8 Feb 2024US 2024/0044326 A1
- Long-stroke pumping unit21 Dec 2023US 2023/0407862 A1Weatherford Technology Holdings, LLC
- Long-stroke pumping unit24 Aug 2023US 2023/0265844 A9Weatherford Technology Holdings, LLC
- Decoupled long stroke pump16 Dec 2021US 2021/0388705 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Pump jack device29US 4,114,375 ACanadian Foremost Ltd. · 1978
- Pneumatic beam pumping unit23US 3,971,213 A1976
- Oil well pumping unit20US 4,512,149 A1985
- Double-acting reciprocating downhole pump18US 6,817,409 B2Weatherford/Lamb, Inc. · 2004
- Reciprocating rod pumping unit17US 10,197,050 B2Weatherford Technology Holdings, LLC · 2019