F01L 1/34
Valve-gear or valve arrangements: characterised by the provision of means for changing
Official title: characterised by the provision of means for changing the timing of the valves without changing the duration of opening {and without affecting the magnitude of the valve lift}
F01L1/34 (Valve-gear or valve arrangements: characterised by the provision of means for changing) appears on 4,348 US grants and 3,918 published applications in this corpus.
Search patents in F01L- Granted patents
- 4,348
- Published applications
- 3,918
- Assignees
- 493
- Inventors
- 4,354
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 11 | 0 |
| 1985 | 16 | 0 |
| 1986 | 14 | 0 |
| 1987 | 9 | 0 |
| 1988 | 14 | 0 |
| 1989 | 20 | 0 |
| 1990 | 20 | 0 |
| 1991 | 30 | 0 |
| 1992 | 61 | 0 |
| 1993 | 51 | 0 |
| 1994 | 38 | 0 |
| 1995 | 24 | 0 |
| 1996 | 43 | 0 |
| 1997 | 50 | 0 |
| 1998 | 68 | 0 |
| 1999 | 69 | 0 |
| 2000 | 75 | 0 |
| 2001 | 127 | 56 |
| 2002 | 140 | 157 |
| 2003 | 149 | 176 |
| 2004 | 159 | 125 |
| 2005 | 145 | 205 |
| 2006 | 155 | 171 |
| 2007 | 158 | 215 |
| 2008 | 141 | 191 |
| 2009 | 103 | 207 |
| 2010 | 146 | 192 |
| 2011 | 142 | 167 |
| 2012 | 164 | 179 |
| 2013 | 158 | 236 |
| 2014 | 232 | 185 |
| 2015 | 227 | 213 |
| 2016 | 163 | 235 |
| 2017 | 180 | 256 |
| 2018 | 230 | 181 |
| 2019 | 203 | 153 |
| 2020 | 186 | 146 |
| 2021 | 123 | 81 |
| 2022 | 88 | 84 |
| 2023 | 63 | 39 |
| 2024 | 70 | 28 |
| 2025 | 34 | 25 |
| 2026 | 14 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Carrier-less spring loaded planetary gearset used with eVCT8 Sep 2026US 12,729,635 B2BorgWarner Inc.
- Actuating gear and method for assembling an actuating gear of an electromechanical camshaft adjuster28 Jul 2026US 12,692,804 B2Schaeffler Technologies AG & Co. KG
- Valve opening-closing timing control device30 Jun 2026US 12,669,072 B2Aisin Corporation
- Valve open and close period control device23 Jun 2026US 12,662,951 B2Aisin Corporation
- Valve opening and closing timing control device2 Jun 2026US 12,644,399 B2Aisin 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
- Carrier-less spring loaded planetary gearset used with evct8 Oct 2026US 2026/0309063 A1BorgWarner Inc.
- 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
Most cited
By later US patents
- Premixed charge compression ignition engine with optimal combustion control196US 6,276,334 B1Cummins Engine Company, Inc. · 2001
- System and method for engine fuel blend control110US 7,287,492 B2Ford Global Technologies, LLC · 2007
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- 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