F16K 41/18
Sealing only when the closure member is in the opened position
Official title: sealing only when the closure member is in the opened position
F16K41/18 (Sealing only when the closure member is in the opened position) appears on 12 US grants and 1 published applications in this corpus.
Search patents in F16K- Granted patents
- 12
- Published applications
- 1
- Assignees
- 8
- Inventors
- 16
- Latest grant
- 5 May 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 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 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Protection structure for rod seal member of two-port valve5 May 2009US 7,527,238 B2SMC Corporation
- Flow shut-off valve12 Apr 1988US 4,736,766 A
- Secondary backseat for gate valve28 Jul 1987US 4,682,757 AJoy Manufacturing Company
- Actuator with nonelastomeric seal23 Dec 1986US 4,630,636 ABaker CAC, Inc.
- Valve assembly22 Jul 1986US 4,601,304 A
Most cited
By later US patents
- Balanced stem gate valve35US 4,281,819 A1981
- Actuator with nonelastomeric seal33US 4,630,636 ABaker CAC, Inc. · 1986
- Floating seal for fluid control devices31US 4,166,606 AThe Meyer Dairy Products Company · 1979
- Heat responsive back seat arrangement for valve operator23US 4,245,661 ACombustion Engineering, Inc. · 1981
- Secondary backseat for gate valve22US 4,682,757 AJoy Manufacturing Company · 1987