F01L 2250/04
The camshaft being driven by belts
Official title: the camshaft being driven by belts
F01L2250/04 (The camshaft being driven by belts) appears on 221 US grants and 235 published applications in this corpus.
Search patents in F01L- Granted patents
- 221
- Published applications
- 235
- Assignees
- 57
- Inventors
- 408
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 3 |
| 2012 | 1 | 7 |
| 2013 | 2 | 9 |
| 2014 | 13 | 7 |
| 2015 | 8 | 11 |
| 2016 | 8 | 26 |
| 2017 | 24 | 43 |
| 2018 | 17 | 26 |
| 2019 | 40 | 39 |
| 2020 | 48 | 26 |
| 2021 | 22 | 15 |
| 2022 | 14 | 7 |
| 2023 | 6 | 2 |
| 2024 | 5 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Valve opening and closing timing control device2 Jun 2026US 12,644,399 B2Aisin Corporation
- Plate valve four stoke head1 Jul 2025US 12,345,182 B2
- Car provided with an internal combustion engine in which the pumps are operated by the camshafts3 Jun 2025US 12,320,291 B2Ferrari S.P. A.
- Belt cover structure for internal combustion engine12 Nov 2024US 12,140,106 B2Honda Motor Co., Ltd.
- Chain or belt drive with multiple non-prevalent order sprockets or pulleys30 Apr 2024US 11,970,958 B1BorgWarner Inc.
- Carrier-less spring loaded planetary gearset used with evct6 Aug 2026US 2026/0226852 A1BorgWarner Inc.
- Variable valve timing mechanism23 Jul 2026US 2026/0210276 A1Subaru Corporation
- Oil supply apparatus for engine25 Jun 2026US 2026/0176989 A1Mazda Motor Corporation
- Valve opening-closing timing control device25 Sep 2025US 2025/0297560 A1Aisin Corporation
- Plate valve four stroke head18 Sep 2025US 2025/0290434 A1
Most cited
By later US patents
- Multi-mode control system for variable camshaft timing devices34US 6,453,859 B1BorgWarner Inc. · 2002
- Pressure fluid supply system for a variable camshaft adjustment20US 5,829,399 AIna Walzlager Schaeffler oHG · 1998
- Electric camshaft adjuster17US 7,673,598 B2Schaeffler KG · 2010
- Method and device for improving charged engines17US 8,347,857 B2GM Global Technology Operations LLC · 2013
- Valve timing control device12US 5,979,380 AAisin Seiki Kabushiki Kaisha · 1999