F01L 1/3442
Using hydraulic chambers with variable volume to transmit the rotating force
Official title: {using hydraulic chambers with variable volume to transmit the rotating force}
F01L1/3442 (Using hydraulic chambers with variable volume to transmit the rotating force) appears on 2,363 US grants and 2,321 published applications in this corpus.
Search patents in F01L- Granted patents
- 2,363
- Published applications
- 2,321
- Assignees
- 285
- Inventors
- 2,348
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 16 | 0 |
| 1993 | 14 | 0 |
| 1994 | 11 | 0 |
| 1995 | 9 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 32 | 0 |
| 1999 | 26 | 0 |
| 2000 | 36 | 0 |
| 2001 | 69 | 35 |
| 2002 | 79 | 85 |
| 2003 | 80 | 110 |
| 2004 | 100 | 83 |
| 2005 | 95 | 119 |
| 2006 | 87 | 88 |
| 2007 | 87 | 106 |
| 2008 | 69 | 115 |
| 2009 | 59 | 117 |
| 2010 | 62 | 123 |
| 2011 | 77 | 116 |
| 2012 | 109 | 127 |
| 2013 | 104 | 152 |
| 2014 | 171 | 110 |
| 2015 | 144 | 132 |
| 2016 | 98 | 135 |
| 2017 | 102 | 135 |
| 2018 | 127 | 105 |
| 2019 | 119 | 89 |
| 2020 | 109 | 90 |
| 2021 | 84 | 47 |
| 2022 | 38 | 39 |
| 2023 | 30 | 26 |
| 2024 | 40 | 15 |
| 2025 | 19 | 14 |
| 2026 | 9 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve opening-closing timing control device30 Jun 2026US 12,669,072 B2Aisin Corporation
- Valve opening and closing timing control device2 Jun 2026US 12,644,399 B2Aisin Corporation
- Control device for hydraulic control valve28 Apr 2026US 12,612,912 B2Hitachi Astemo, Ltd.
- Variable camshaft timing assembly with deformable extension17 Mar 2026US 12,577,894 B2BorgWarner Inc.
- Variable valve timing system24 Feb 2026US 12,560,109 B2Suzuki Motor Corporation
- Vane seal spring8 Oct 2026US 2026/0309060 A1
- Variable cam timing phaser8 Oct 2026US 2026/0309061 A1
- Variable cam timing phaser and method of assembling the same8 Oct 2026US 2026/0309062 A1
- Hydraulic camshaft phaser for variable valve control of a combustion engine and method for operating a hydraulic camshaft phaser13 Aug 2026US 2026/0235054 A1Schaeffler Technologies AG & Co. KG
- Hydraulic control valve and method of controlling a hybrid cam phaser30 Jul 2026US 2026/0218632 A1
Most cited
By later US patents
- System and method for engine fuel blend control110US 7,287,492 B2Ford Global Technologies, LLC · 2007
- Device for adjusting an angular phase difference between two elements100US 4,858,572 AAisin Seiki Kabushiki Kaisha · 1989
- Variable camshaft timing for internal combustion engine95US 5,107,804 ABorg-Warner Automotive Transmission & Engine Components Corporation · 1992
- Variable camshaft timing for internal combustion engine93US 5,002,023 ABorg-Warner Automotive, Inc. · 1991
- System for regulating valve timing of internal combustion engine93US 5,924,395 AToyota Jidosha Kabushiki Kaisha · 1999