F16K 31/38
In which the fluid works directly on both sides of the fluid
Official title: in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side (F16K31/40 takes precedence)
F16K31/38 (In which the fluid works directly on both sides of the fluid) appears on 458 US grants and 368 published applications in this corpus.
Search patents in F16K- Granted patents
- 458
- Published applications
- 368
- Assignees
- 248
- Inventors
- 649
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 4 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 7 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 0 |
| 2002 | 11 | 9 |
| 2003 | 11 | 20 |
| 2004 | 12 | 16 |
| 2005 | 21 | 20 |
| 2006 | 10 | 15 |
| 2007 | 12 | 11 |
| 2008 | 3 | 10 |
| 2009 | 11 | 15 |
| 2010 | 5 | 15 |
| 2011 | 11 | 18 |
| 2012 | 13 | 14 |
| 2013 | 8 | 16 |
| 2014 | 10 | 12 |
| 2015 | 16 | 14 |
| 2016 | 10 | 14 |
| 2017 | 15 | 13 |
| 2018 | 7 | 17 |
| 2019 | 18 | 28 |
| 2020 | 22 | 19 |
| 2021 | 25 | 17 |
| 2022 | 16 | 20 |
| 2023 | 20 | 8 |
| 2024 | 10 | 10 |
| 2025 | 12 | 11 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve with valve unit and pushbutton housing with actuating button25 Aug 2026US 12,716,513 B2Grohe AG
- Diaphragm valve formed using additive manufacture18 Aug 2026US 12,710,102 B2Neptune Technology Group Inc.
- System for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve2 Jun 2026US 12,644,535 B2Barko Hydraulics, LLC
- Circulation valve and air conditioner26 May 2026US 12,638,088 B2Carrier Corporation
- Sanitary valve24 Mar 2026US 12,584,563 B2Neoperl GmbH
- Shut-off device with variable stop23 Jul 2026US 2026/0210443 A1Neoperl GmbH
- Shut-off device with a bearing device4 Jun 2026US 2026/0153151 A1Neoperl GmbH
- Activation Signal For Solenoids And Method Of Activation12 Mar 2026US 2026/0072457 A1Rain Bird Corporation
- Self-cleaning flow control valve26 Feb 2026US 2026/0053102 A1K-Rain Manufacturing Corp.
- Valve With Valve Unit and Pushbutton Housing With Actuating Button5 Feb 2026US 2026/0036218 A1Grohe AG
Most cited
By later US patents
- Method and apparatus for using a high-pressure fluid jet97US 5,524,821 AJetec Company · 1996
- Multi-operation discharge control device78US 6,019,343 A2000
- Flush valve flow control refill ring77US 5,335,694 ASloan Valve Company · 1994
- Flushometer piston77US 5,881,993 ASloan Valve Company · 1999
- Pilot operated diaphragm valve76US 4,135,696 ARichdel, Inc. · 1979