F04C 29/023
Lubricant distribution through a hollow driving shaft
Official title: {Lubricant distribution through a hollow driving shaft (F04C29/025 takes precedence)}
F04C29/023 (Lubricant distribution through a hollow driving shaft) appears on 409 US grants and 336 published applications in this corpus.
Search patents in F04C- Granted patents
- 409
- Published applications
- 336
- Assignees
- 113
- Inventors
- 790
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 12 | 0 |
| 1990 | 2 | 0 |
| 1991 | 10 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 9 | 0 |
| 2001 | 6 | 0 |
| 2002 | 4 | 2 |
| 2003 | 4 | 10 |
| 2004 | 7 | 15 |
| 2005 | 5 | 8 |
| 2006 | 8 | 10 |
| 2007 | 10 | 5 |
| 2008 | 5 | 14 |
| 2009 | 12 | 11 |
| 2010 | 7 | 10 |
| 2011 | 7 | 11 |
| 2012 | 8 | 11 |
| 2013 | 8 | 9 |
| 2014 | 10 | 10 |
| 2015 | 9 | 16 |
| 2016 | 6 | 15 |
| 2017 | 15 | 15 |
| 2018 | 11 | 19 |
| 2019 | 10 | 24 |
| 2020 | 24 | 17 |
| 2021 | 14 | 23 |
| 2022 | 28 | 22 |
| 2023 | 23 | 22 |
| 2024 | 28 | 12 |
| 2025 | 16 | 14 |
| 2026 | 5 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Scroll-type machine with axially compliant mounting226US 4,877,382 ACopeland Corporation · 1989
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- Non-orbiting scroll mounting arrangements for a scroll machine115US 5,102,316 ACopeland Corporation · 1992
- Scroll compressor with a thrust reduction mechanism96US 4,696,630 AKabushiki Kaisha Toshiba · 1987
- Overheat protection for fluid pump89US 6,837,688 B2Standex International Corporation · 2005