F15B 2201/21
Using springs
Official title: using springs
F15B2201/21 (Using springs) appears on 126 US grants and 106 published applications in this corpus.
Search patents in F15B- Granted patents
- 126
- Published applications
- 106
- Assignees
- 86
- Inventors
- 243
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 1 |
| 2003 | 3 | 2 |
| 2004 | 2 | 6 |
| 2005 | 4 | 4 |
| 2006 | 3 | 5 |
| 2007 | 1 | 3 |
| 2008 | 1 | 3 |
| 2009 | 2 | 6 |
| 2010 | 1 | 2 |
| 2011 | 9 | 7 |
| 2012 | 1 | 11 |
| 2013 | 5 | 8 |
| 2014 | 8 | 4 |
| 2015 | 9 | 2 |
| 2016 | 4 | 2 |
| 2017 | 3 | 4 |
| 2018 | 2 | 6 |
| 2019 | 4 | 4 |
| 2020 | 8 | 4 |
| 2021 | 1 | 3 |
| 2022 | 2 | 7 |
| 2023 | 3 | 2 |
| 2024 | 5 | 2 |
| 2025 | 2 | 4 |
| 2026 | 2 | 4 |
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
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston28 Apr 2026US 12,612,929 B2Sonnax Transmission Company
- Hydraulic energy retention27 May 2025US 12,312,070 B2Textron Innovations Inc.
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston27 May 2025US 12,313,088 B2Sonnax Transmission Company
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston29 Oct 2024US 12,129,922 B2Sonnax Transmission Company
- Integrated Electrohydraulic Actuator30 Jul 2026US 2026/0218734 A1Parker-Hannifin Corporation
- Device4 Jun 2026US 2026/0153102 A1Hydac Technology GmbH
- Medium pressure accumulator with fast fill supply valve and brake system using same21 May 2026US 2026/0138577 A1ZF Active Safety US Inc.
- Apparatus comprising a plurality of tools each having at least one hydraulic chamber for hydraulic liquid29 Jan 2026US 2026/0028923 A1Freevalve AB
- Hydraulic energy retention7 Aug 2025US 2025/0250001 A1Textron Innovations Inc.
Most cited
By later US patents
- Method for arranging a separating piston in a cavity and a device with such a separating piston69US 7,975,814 B2Ohlins Racing AB · 2011
- Accumulator45US 4,799,048 AJidosha Kabushiki Kaisha · 1989
- Vertical roller mill with improved hydro-pneumatic loading system45US 7,028,934 B2F. L. Smidth & Co. · 2006
- Accumulator/oil tank for journal oil supply39US 6,267,147 B1Pratt & Whitney Canada Corp. · 2001
- Hydraulic accumulator vent and method for making the same38US 6,390,133 B1Robert Bosch GmbH · 2002