F15B 11/13
Using separate dosing chambers of predetermined volume
Official title: using {separate dosing} chambers of predetermined volume
F15B11/13 (Using separate dosing chambers of predetermined volume) appears on 23 US grants and 21 published applications in this corpus.
Search patents in F15B- Granted patents
- 23
- Published applications
- 21
- Assignees
- 28
- Inventors
- 44
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 4 |
| 2019 | 2 | 0 |
| 2020 | 2 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic isolation cylinder-based system24 Feb 2026US 12,560,182 B1SRI Energy, Inc.
- Fluid equipment15 Jun 2021US 11,035,387 B2Eagle Industry Co., Ltd.
- Hydraulic metering system for downhole hydraulic actuation28 Jul 2020US 10,724,334 B2Schlumberger Technology Corporation
- Rapidly modulated hydraulic supply for a robotic device14 Jan 2020US 10,533,542 B2Sarcos LC
- Metering fluid to fluid actuators29 Oct 2019US 10,458,439 B2Schlumberger Technology Corporation
- Hydraulic Isolation Cylinder-Based System6 Aug 2026US 2026/0226921 A1SRI Energy, Inc.
- Step lift control of hydraulically actuated popped valves14 Mar 2024US 2024/0084917 A1Wartsila Services Switzerland Ltd.
- Fluid equipment9 Jan 2020US 2020/0011384 A1Eagle Industry Co., Ltd.
- Hydraulic metering system for downhole hydraulic actuation27 Sep 2018US 2018/0274328 A1Schlumberger Technology Corporation
- Metering Fluid to Fluid Actuators31 May 2018US 2018/0149174 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods60US 6,585,051 B2Welldynamics, Inc. · 2003
- Differential area electrohydraulic doser actuator29US 4,256,017 AThe Bendix Corporation · 1981
- Five-position hydraulic actuating apparatus27US 4,319,609 ASociete Anonyme D. B. A. · 1982
- Rapidly modulated hydraulic supply for a robotic device24US 10,533,542 B2Sarcos LC · 2020
- Stroke control tool for subterranean well hydraulic actuator assembly22US 6,269,641 B1Agip Oil US L.L.C. · 2001