F04D 29/526
Details of the casing section radially opposing blade tips
Official title: {Details of the casing section radially opposing blade tips (ducts F04D29/545)}
F04D29/526 (Details of the casing section radially opposing blade tips) appears on 646 US grants and 708 published applications in this corpus.
Search patents in F04D- Granted patents
- 646
- Published applications
- 708
- Assignees
- 246
- Inventors
- 1,401
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 13 | 1 |
| 2002 | 12 | 8 |
| 2003 | 5 | 10 |
| 2004 | 8 | 5 |
| 2005 | 8 | 16 |
| 2006 | 8 | 11 |
| 2007 | 8 | 21 |
| 2008 | 7 | 31 |
| 2009 | 8 | 26 |
| 2010 | 16 | 32 |
| 2011 | 11 | 29 |
| 2012 | 34 | 18 |
| 2013 | 22 | 26 |
| 2014 | 17 | 27 |
| 2015 | 19 | 33 |
| 2016 | 8 | 77 |
| 2017 | 39 | 67 |
| 2018 | 49 | 65 |
| 2019 | 72 | 42 |
| 2020 | 72 | 38 |
| 2021 | 33 | 32 |
| 2022 | 37 | 20 |
| 2023 | 26 | 18 |
| 2024 | 27 | 18 |
| 2025 | 24 | 12 |
| 2026 | 9 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compressor shroud with swept grooves22 Sep 2026US 12,742,459 B2Pratt & Whitney Canada Corp.
- Fan device with metal annular frame18 Aug 2026US 12,710,055 B2Cooler Master Co., Ltd.
- Treatment of a non-axisymmetric casing comprising a plenum, with controlled opening23 Jun 2026US 12,663,020 B2Safran
- Fan casing or liner with interchangeable tip treatment segments26 May 2026US 12,638,024 B2Rolls-Royce North American Technologies Inc.
- Compressor cooling system for a turbofan engine19 May 2026US 12,631,125 B1Pratt & Whitney Canada Corp.
- Fan casing or liner with interchangeable tip treatment segments3 Sep 2026US 2026/0258814 A1Rolls-Royce North American Technologies Inc.
- Blading system for axial compressors with axially opposing base merged double triangular prism device blades6 Aug 2026US 2026/0226914 A1Spacerolls Aerospace Technologies Private Limited
- Blower device and method for manufacturing same30 Jul 2026US 2026/0218727 A1Nidec Corporation
- Fan device23 Jul 2026US 2026/0210377 A1Cooler Master Co., Ltd.
- Anti-pressure-relief structure for fan23 Jul 2026US 2026/0210378 A1Asia Vital Components Co., Ltd.
Most cited
By later US patents
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011
- Expandable impeller pump197US 8,376,707 B2The Penn State Research Foundation · 2013
- Side-vented axial fan and associated fabrication methods124US 5,407,324 ACompaq Computer Corporation · 1995
- Air movement apparatus123US 6,123,618 AJetfan Australia Pty. Ltd. · 2000