F15B 15/1409
With two or more independently movable working pistons
Official title: {with two or more independently movable working pistons}
F15B15/1409 (With two or more independently movable working pistons) appears on 144 US grants and 138 published applications in this corpus.
Search patents in F15B- Granted patents
- 144
- Published applications
- 138
- Assignees
- 117
- Inventors
- 288
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 4 | 1 |
| 2003 | 3 | 4 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 6 |
| 2007 | 1 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 5 | 3 |
| 2011 | 1 | 7 |
| 2012 | 1 | 4 |
| 2013 | 4 | 3 |
| 2014 | 6 | 9 |
| 2015 | 0 | 6 |
| 2016 | 6 | 6 |
| 2017 | 7 | 8 |
| 2018 | 10 | 16 |
| 2019 | 11 | 10 |
| 2020 | 10 | 8 |
| 2021 | 12 | 12 |
| 2022 | 6 | 10 |
| 2023 | 7 | 8 |
| 2024 | 13 | 4 |
| 2025 | 6 | 2 |
| 2026 | 0 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for control and monitoring of actuated valves18 Nov 2025US 12,474,228 B2Swagelok Company
- Hydraulic cylinder assembly for dump trailers11 Nov 2025US 12,466,301 B2Bearclaw Equip Inc.
- Valve manifold, valve and actuator assembly14 Oct 2025US 12,442,394 B2Asco, L. P.
- Hydraulically actuatable work device designed to be handheld24 Jun 2025US 12,337,455 B2Gustav Klauke GmbH
- Intrascopic hydraulic cylinder29 Apr 2025US RE50,407 E1Flip Screen Australia Pty Ltd
- Cylinder device13 Aug 2026US 2026/0235143 A1SMC Corporation
- Cylinder device9 Jul 2026US 2026/0194081 A1SMC Corporation
- Turbo engine including a system to control pitch of a propeller blade4 Jun 2026US 2026/0153033 A1General Electric Company
- Telescopic cylinder with variable volume feed channels and cylinder control28 May 2026US 2026/0146630 A1Manitou Italia S.R.L.
- Brake cylinder for a vehicle brake14 May 2026US 2026/0131774 A1SAF-HOLLAND GmbH
Most cited
By later US patents
- Hydraulic booster device for linear actuator212US 5,205,200 A1993
- Multiple-stage hydraulic cylinder30US 5,613,418 AMAN Gutehoffnungshutte Aktiengesellschaft · 1997
- Dual mode positioner for an aircraft landing gear axle beam26US 6,308,916 B1The B. F. Goodrich Company · 2001
- Method and device for suppressing vibration of boom of concrete pump truck18US 8,037,682 B2Sany Heavy Industry Co., Ltd. · 2011
- Systems and methods for optimizing thermal efficiencey of a compressed air energy storage system18US 8,272,212 B2General Compression, Inc. · 2012