E05F 3/04
Closers or openers with braking devices: with liquid piston brakes
Official title: with liquid piston brakes (rotary type E05F3/14)
E05F3/04 (Closers or openers with braking devices: with liquid piston brakes) appears on 576 US grants and 490 published applications in this corpus.
Search patents in E05F- Granted patents
- 576
- Published applications
- 490
- Assignees
- 245
- Inventors
- 764
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 10 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 11 | 0 |
| 1988 | 9 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 11 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 3 |
| 2002 | 12 | 7 |
| 2003 | 11 | 11 |
| 2004 | 5 | 19 |
| 2005 | 15 | 10 |
| 2006 | 10 | 13 |
| 2007 | 6 | 12 |
| 2008 | 6 | 19 |
| 2009 | 4 | 9 |
| 2010 | 9 | 18 |
| 2011 | 9 | 12 |
| 2012 | 6 | 22 |
| 2013 | 18 | 14 |
| 2014 | 24 | 17 |
| 2015 | 17 | 27 |
| 2016 | 19 | 26 |
| 2017 | 21 | 26 |
| 2018 | 23 | 27 |
| 2019 | 30 | 34 |
| 2020 | 27 | 31 |
| 2021 | 40 | 33 |
| 2022 | 18 | 24 |
| 2023 | 22 | 34 |
| 2024 | 25 | 18 |
| 2025 | 29 | 18 |
| 2026 | 15 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E05F 3/10With a spring, other than a torsion spring, and a piston, the435
- E05F 3/12Special devices controlling the circulation of the liquid156
- E05F 3/08In which a torsion spring rotates a member around an axis arranged19
- E05F 3/06In which a torsion spring rotates a member around an axis perpendicular14
Recent patents
- Adjustment screw indicator mechanism18 Aug 2026US 12,709,930 B2Schlage Lock Company LLC
- Modular rotating shear thickening fluid based object control mechanism18 Aug 2026US 12,710,086 B2Moshun, LLC
- Dashpot for damping a closing movement of a hinged closure member28 Jul 2026US 12,692,739 B2Locinox
- System for the controlled rotary movement of a door, a leaf or the like21 Jul 2026US 12,687,060 B2
- Hydraulic hinge for the controlled rotary movement of a door, a leaf or the like26 May 2026US 12,637,888 B2
- Grill appliance with a damper assembly8 Oct 2026US 2026/0305874 A1
- Telescopic Tube Assembly with Idle Stroke and Integrated Damper8 Oct 2026US 2026/0309205 A1
- Door closer13 Aug 2026US 2026/0234977 A1Dormakaba Deutschland GmbH
- Refrigerator9 Jul 2026US 2026/0194289 A1Samsung Electronics Co., Ltd.
- Variable-speed buffer oil cylinder2 Jul 2026US 2026/0185585 A1Guangdong Zhaogao Metal Technology Co., Ltd.
Most cited
By later US patents
- Axial door operator101US 6,481,160 B1The Stanley Works · 2002
- Intelligent door restraint99US 8,225,458 B12012
- Method for controlling the operational modes of a door in conjunction with a mechanical door control mechanism86US 5,913,763 ADorma Door Controls, Inc. · 1999
- Automatic door operator for swing doors81US 4,501,090 AChikura Kogyo Kabushiki Kaisha · 1985
- Intelligent door restraint75US 9,121,217 B12015