F04D 29/282
The leading edge of each vane being substantially parallel to the rotation
Official title: {the leading edge of each vane being substantially parallel to the rotation axis}
F04D29/282 (The leading edge of each vane being substantially parallel to the rotation) appears on 548 US grants and 608 published applications in this corpus.
Search patents in F04D- Granted patents
- 548
- Published applications
- 608
- Assignees
- 285
- Inventors
- 1,301
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 12 | 0 |
| 2001 | 13 | 2 |
| 2002 | 15 | 18 |
| 2003 | 18 | 19 |
| 2004 | 9 | 10 |
| 2005 | 12 | 23 |
| 2006 | 12 | 22 |
| 2007 | 14 | 13 |
| 2008 | 7 | 16 |
| 2009 | 6 | 18 |
| 2010 | 8 | 11 |
| 2011 | 10 | 7 |
| 2012 | 12 | 15 |
| 2013 | 2 | 20 |
| 2014 | 12 | 17 |
| 2015 | 14 | 37 |
| 2016 | 16 | 37 |
| 2017 | 23 | 38 |
| 2018 | 34 | 45 |
| 2019 | 40 | 35 |
| 2020 | 36 | 31 |
| 2021 | 21 | 30 |
| 2022 | 31 | 42 |
| 2023 | 32 | 25 |
| 2024 | 35 | 27 |
| 2025 | 22 | 17 |
| 2026 | 6 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Centrifugal fan or compressor composite impeller with abrasion resistance16 Jun 2026US 12,655,851 B2Howden Turbo GmbH
- Ventilation fan19 May 2026US 12,631,195 B1Broan-NuTone LLC
- Fan mechanism21 Apr 2026US 12,607,197 B2Delta Electronics, Inc.
- Centrifugal fan and electronic apparatus17 Mar 2026US 12,581,612 B2Lenovo (Singapore) Pte. Ltd.
- Ventilation device24 Feb 2026US 12,560,370 B2LG Electronics Inc.
- Centrifugal fan or compressor composite impeller with abrasion resistance17 Sep 2026US 2026/0275998 A1Howden Turbo GmbH
- Fan Impeller Mid-Segment, Cross-Flow Fan Impeller and Air Conditioner27 Aug 2026US 2026/0251160 A1Gree Electric Appliances, Inc. of Zhuhai
- COOKING APPLIANCE (As Amended)27 Aug 2026US 2026/0251315 A1LG Electronics Inc.
- Centrifugal fan module, cooling device, and refrigerator including the same6 Aug 2026US 2026/0226918 A1Samsung Electronics Co., Ltd.
- Volute, fan and air conditioner30 Jul 2026US 2026/0218722 A1Gd Midea Air-Conditioning Equipment Co., Ltd.
Most cited
By later US patents
- Medical ventilator268US 6,543,449 B1Respironics, Inc. · 2003
- Blower impeller apparatus with pivotable blades187US 6,547,519 B2Hewlett-Packard Development Company, L. P. · 2003
- Single piece impeller having radial output125US 6,537,030 B1Fasco Industries, Inc. · 2003
- Combination fan-flywheel-pulley assembly and method of forming92US 6,695,581 B2McMillan Electric Company · 2004
- High efficiency pump impeller85US 6,210,116 B12001