Y10T 137/538
Expansible chamber operated by valve actuator for draining riser
Y10T137/538 (Expansible chamber operated by valve actuator for draining riser) appears on 19 US grants and 8 published applications in this corpus.
Search patents in Y10T- Granted patents
- 19
- Published applications
- 8
- Assignees
- 10
- Inventors
- 16
- Latest grant
- 28 Apr 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Structural improvement of piston set for use in hydrant28 Apr 2020US 10,633,837 B2Chuan Wei Metal Co., Ltd.
- Self-draining hydrant with piston assembly3 Mar 2020US 10,577,779 B2
- Freeze proof sanitary yard hydrant21 Jul 2015US 9,085,878 B2Merrill Manufacturing Company
- Fire hydrant security integrated flow control/backflow preventer insert valve7 Apr 2015US 8,997,777 B2
- Yard hydrant made easy9 Apr 2013US 8,413,675 B2
- Structural improvement of piston set for use in hydrant18 Apr 2019US 2019/0112793 A1Chuan Wei Metal Co., Ltd.
- Self-draining hydrant with piston assembly4 Oct 2018US 2018/0282982 A1
- Freeze Proof Sanitary Yard Hydrant14 May 2015US 2015/0129052 A1Merrill Manufacturing Company
- Fire hydrant security integrated flow control/backflow preventer insert valve21 Feb 2013US 2013/0042924 A1
- Yard hydrant made easy4 Aug 2011US 2011/0186145 A1
Most cited
By later US patents
- Freezeless ground hydrant and method for operating same33US 4,653,521 AWoodford Manufacturing Company · 1987
- Ground hydrant and method for operating same29US 4,653,522 AWoodford Manufacturing Company · 1987
- Positive displacement yard hydrant19US 6,047,723 A2000
- Freezeproof sanitary water supply appliance18US 4,096,877 A1978
- Yard hydrant18US 5,261,441 AMerrill Manufacturing Company · 1993