Y10T 137/2554
Reversing or 4-way valve systems
Y10T137/2554 (Reversing or 4-way valve systems) appears on 92 US grants and 22 published applications in this corpus.
Search patents in Y10T- Granted patents
- 92
- Published applications
- 22
- Assignees
- 59
- Inventors
- 121
- Latest grant
- 3 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 2 |
| 2004 | 2 | 2 |
| 2005 | 2 | 3 |
| 2006 | 2 | 0 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 2 |
| 2016 | 1 | 1 |
| 2017 | 2 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Redundant pneumatic circuit for reliability enhancement of vitrectomy instruments3 Jan 2023US 11,540,942 B2Alcon Inc.
- Pneumatic valve assembly and method4 Apr 2017US 9,611,871 B2
- Valve assembly and method of controlling flow of fluid4 Apr 2017US 9,611,947 B2GE Aviation Systems LLC
- Dynamically adjusting counterbalance valve1 Mar 2016US 9,273,702 B2Sun Hydraulics, LLC
- Control element and check valve assembly17 Nov 2015US 9,188,375 B2Zhejiang Dunan Hetian Metal Co., Ltd.
- Redundant Pneumatic Circuit for Reliability Enhancement of Vitrectomy Instruments30 Jan 2020US 2020/0030149 A1Alcon Inc.
- Valve assembly and method of controlling flow of fluid15 Dec 2016US 2016/0363228 A1GE Aviation Systems LLC
- Control element and check valve assembly4 Jun 2015US 2015/0153081 A1Zhejiang Dunan Hetian Metal Co., Ltd.
- Pneumatic Valve Assembly and Method19 Mar 2015US 2015/0075640 A1
- Medication safety enhancement for secondary infusion22 May 2014US 2014/0142545 A1CareFusion 303, Inc.
Most cited
By later US patents
- Medication safety enhancement for secondary infusion49US 8,672,875 B2CareFusion 303, Inc. · 2014
- Three-way valve48US 4,448,211 ATokyo Shibaura Denki Kabushiki Kaisha · 1984
- Integrated control device for a fluid circuit and applications thereof38US 4,240,255 ALes Applications Hydrauliques R. Sarrazin S.A. · 1980
- Counterbalance valve26US 4,244,275 AAbex Corporation · 1981
- Self mixing sprayer26US 4,638,924 A1987