F15B 2201/312
Sealings therefor
Official title: Sealings therefor, e.g. piston rings
F15B2201/312 (Sealings therefor) appears on 119 US grants and 67 published applications in this corpus.
Search patents in F15B- Granted patents
- 119
- Published applications
- 67
- Assignees
- 81
- Inventors
- 223
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 1 | 4 |
| 2003 | 8 | 4 |
| 2004 | 4 | 6 |
| 2005 | 3 | 2 |
| 2006 | 3 | 7 |
| 2007 | 1 | 2 |
| 2008 | 3 | 5 |
| 2009 | 2 | 0 |
| 2010 | 0 | 1 |
| 2011 | 2 | 3 |
| 2012 | 0 | 1 |
| 2013 | 6 | 3 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 0 | 2 |
| 2017 | 3 | 1 |
| 2018 | 2 | 2 |
| 2019 | 3 | 3 |
| 2020 | 3 | 4 |
| 2021 | 2 | 1 |
| 2022 | 1 | 2 |
| 2023 | 2 | 3 |
| 2024 | 1 | 1 |
| 2025 | 4 | 6 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston30 Jun 2026US 12,669,175 B2Sonnax Transmission Company
- Pressure applying device25 Nov 2025US 12,480,536 B2Eagle Industry Co., Ltd.
- Internal floating piston30 Sep 2025US 12,429,074 B2Fox Factory, Inc.
- Accumulator piston device25 Mar 2025US 12,257,989 B2Robert Bosch GmbH
- Piston accumulator4 Mar 2025US 12,241,482 B2Hydac Technology GmbH
- Internal floating piston11 Dec 2025US 2025/0376994 A1Fox Factory, Inc.
- Pressure applying device13 Nov 2025US 2025/0347300 A1Eagle Industry Co., Ltd.
- Piston Accumulator19 Jun 2025US 2025/0198427 A1Hydac Technology GmbH
- Hydraulic Accumulator20 Mar 2025US 2025/0092885 A1Hydac Technology GmbH
- Internal floating piston13 Mar 2025US 2025/0084876 A1Fox Factory, Inc.
Most cited
By later US patents
- Accumulator51US 6,789,576 B2NHK Spring Co., Ltd. · 2004
- Static head charged hydraulic accumulator45US 4,777,800 AVetco Gray Inc. · 1988
- Accumulator45US 4,799,048 AJidosha Kabushiki Kaisha · 1989
- Accumulator43US 4,858,898 ANHK Spring Co., Ltd. · 1989
- Hydraulic accumulator43US 7,322,377 B2Hydac Technology GmbH · 2008