F04B 47/028
Details of the walking beam
Official title: {details of the walking beam}
F04B47/028 (Details of the walking beam) appears on 57 US grants and 36 published applications in this corpus.
Search patents in F04B- Granted patents
- 57
- Published applications
- 36
- Assignees
- 36
- Inventors
- 116
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 8 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 3 |
| 2018 | 1 | 2 |
| 2019 | 2 | 6 |
| 2020 | 3 | 3 |
| 2021 | 6 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 2 |
| 2024 | 1 | 6 |
| 2025 | 3 | 2 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Off-vertical pumping unit48US 4,603,592 ALegrand Industries Ltd. · 1986
- Natural gas supply apparatus and method30US 8,297,362 B1HighMount Exploration & Production LLC · 2012
- Apparatus for controlling a pumpjack prime mover29US 4,631,954 A1986
- Gas pressure operated power source19US 4,513,576 ACentrifugal Piston Expander, Inc. · 1985
- Air balance control for a pumping unit17US 5,180,289 ABaker Hughes Incorporated · 1993