F04D 29/044
Arrangements for joining or assembling shafts
F04D29/044 (Arrangements for joining or assembling shafts) appears on 154 US grants and 119 published applications in this corpus.
Search patents in F04D- Granted patents
- 154
- Published applications
- 119
- Assignees
- 109
- Inventors
- 310
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 3 |
| 2003 | 1 | 1 |
| 2004 | 3 | 2 |
| 2005 | 0 | 3 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 1 | 2 |
| 2010 | 2 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 3 |
| 2013 | 6 | 3 |
| 2014 | 0 | 2 |
| 2015 | 1 | 3 |
| 2016 | 3 | 6 |
| 2017 | 4 | 7 |
| 2018 | 3 | 10 |
| 2019 | 4 | 9 |
| 2020 | 13 | 10 |
| 2021 | 6 | 12 |
| 2022 | 9 | 10 |
| 2023 | 11 | 14 |
| 2024 | 13 | 4 |
| 2025 | 8 | 5 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Torsional coupling for electric hydraulic fracturing fluid pumps159US 9,650,879 B2U.S. Well Services, LLC · 2017
- Submerisble molten metal pump157US 5,203,681 A1993
- Submersible molten metal pump143US 5,330,328 A1994
- Drive system for impeller shafts140US 5,092,821 AThe Carborundum Company · 1992
- Shaft coupling for a molten metal pump139US 5,622,481 A1997