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Class Information
Number: 251/26
Name: Valves and valve actuation > Fluid actuated or retarded > Pilot or servo type motor > Alternative pressure sources or pilot valve
Description: Subject matter in which the servo-motor may receive fluid from any one of two or more sources of fluid pressure or in which two or more pilot valves are employed for a single servo unit, one pilot valve duplicating the function of another pilot valve.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7328817 |
Device for dispensing a heated liquid |
Feb. 12, 2008 |
| 7303147 |
Sprinkler having valve module with reciprocating valve seat |
Dec. 4, 2007 |
| 7252116 |
Coupling solenoid valve |
Aug. 7, 2007 |
| 7252115 |
Coupling solenoid valve |
Aug. 7, 2007 |
| 7118087 |
Coupling solenoid valve |
Oct. 10, 2006 |
| 7100628 |
Electromechanically-assisted regulator control assembly |
Sep. 5, 2006 |
| 7028975 |
Flush valve structure |
Apr. 18, 2006 |
| 6974114 |
Double valve flusher |
Dec. 13, 2005 |
| 6910496 |
Gas conversion assembly |
Jun. 28, 2005 |
| 6883541 |
Manual-automatic water faucet |
Apr. 26, 2005 |
| 6871834 |
Circuit for operating a valve closure system |
Mar. 29, 2005 |
| 6802339 |
Assembly having a spring-loaded tandem control valve |
Oct. 12, 2004 |
| 6766828 |
Interlock valve |
Jul. 27, 2004 |
| 6705342 |
Modulating gas valve with natural/LP gas conversion capability |
Mar. 16, 2004 |
| 6659420 |
Manual and automatic flow control valve |
Dec. 9, 2003 |
| 6644346 |
Spring-loaded tandem control valve |
Nov. 11, 2003 |
| 6637722 |
Pilot operated microvalve device |
Oct. 28, 2003 |
| 6584999 |
Fluid pressure controller |
Jul. 1, 2003 |
| 6540203 |
Pilot operated microvalve device |
Apr. 1, 2003 |
| 6478048 |
Two out of three voting solenoid arrangement |
Nov. 12, 2002 |
| 6443175 |
Vacuum pressure generator circuit with non-volitile memory function |
Sep. 3, 2002 |
| 6443419 |
Fast working hydraulic valve |
Sep. 3, 2002 |
| 6435202 |
Two out of three voting solenoid arrangement |
Aug. 20, 2002 |
| 6427967 |
Valve, unit, assembly and system |
Aug. 6, 2002 |
| 6398182 |
Pilot solenoid control valve with an emergency operator |
Jun. 4, 2002 |
| 6398181 |
Valve arrangement |
Jun. 4, 2002 |
| 6354327 |
Automatic position-control valve assembly |
Mar. 12, 2002 |
| 6296226 |
Fluid metering system |
Oct. 2, 2001 |
| 6253784 |
Monostable valve |
Jul. 3, 2001 |
| 6167901 |
Pilot 3-port transfer valve |
Jan. 2, 2001 |
| 6155282 |
Two out of three voting solenoid arrangement |
Dec. 5, 2000 |
| 6109291 |
Pilot 5-port transfer valve |
Aug. 29, 2000 |
| 6053202 |
Fail-safe closure system for remotely operable valve actuator |
Apr. 25, 2000 |
| 6010112 |
Driving device for a shut-off device in a pipe-line |
Jan. 4, 2000 |
| 6000674 |
Reliable flush valve |
Dec. 14, 1999 |
| 5971356 |
Electromagnetically actuable valve |
Oct. 26, 1999 |
| 5967167 |
Remote controlled drinker system |
Oct. 19, 1999 |
| 5957148 |
Valve system having a deadman controlled actuating member in a vented chamber |
Sep. 28, 1999 |
| 5868157 |
Pilot transfer valve |
Feb. 9, 1999 |
| 5860445 |
Transfer valve manifold |
Jan. 19, 1999 |
| 5799561 |
Control device |
Sep. 1, 1998 |
| 5665898 |
Method and apparatus for testing solenoids in a safety system by bypassing the solenoid operated pilot valve |
Sep. 9, 1997 |
| 5520206 |
Exhaust reduction system for control valves |
May. 28, 1996 |
| 5413141 |
Two-stage gas valve with natural/LP gas conversion capability |
May. 9, 1995 |
| 5404902 |
Isolation automatic control valve |
Apr. 11, 1995 |
| 5363872 |
Low particulate slit valve system and method for controlling same |
Nov. 15, 1994 |
| 5335688 |
Variable pressure regulating valve system |
Aug. 9, 1994 |
| 5335693 |
Valve |
Aug. 9, 1994 |
| 5299774 |
Diaphragm controlled irrigation valve with captivated bleed screw |
Apr. 5, 1994 |
| RE34202 |
Dual mode pneumatic control system |
Mar. 30, 1993 |
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