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Class Information
Number: 137/906
Name: Fluid handling > Valves biased by fluid "springs"
Description: Art collection drawn to valves biased by fluid "springs".
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7458390 |
Breath controlled air inlet for blower |
Dec. 2, 2008 |
| 7387659 |
Pneumatically operated automatic shutoff circuit for controlling the generation of gas |
Jun. 17, 2008 |
| 7370615 |
Variable valve actuator |
May. 13, 2008 |
| 7357150 |
Safety shut-off device |
Apr. 15, 2008 |
| 7290509 |
Variable valve actuator |
Nov. 6, 2007 |
| 7258133 |
Pressure reducing valve |
Aug. 21, 2007 |
| 7213549 |
Variable valve actuator |
May. 8, 2007 |
| 7156058 |
Variable valve actuator |
Jan. 2, 2007 |
| 7093605 |
Pressure control device for a pipeline |
Aug. 22, 2006 |
| 6978799 |
Emergency pressure relief valve with enhanced reset |
Dec. 27, 2005 |
| 6772791 |
Directly operated pneumatic valve having an air assist return |
Aug. 10, 2004 |
| 6675751 |
Two-mass bi-directional hydraulic damper |
Jan. 13, 2004 |
| 6601552 |
Hydraulically controllable globe valve |
Aug. 5, 2003 |
| 6589350 |
Vacuum processing chamber with controlled gas supply valve |
Jul. 8, 2003 |
| 6502803 |
Valve for controlling liquids |
Jan. 7, 2003 |
| 6494231 |
Valve device |
Dec. 17, 2002 |
| 6491007 |
Hydraulically controllable globe valve |
Dec. 10, 2002 |
| 6240956 |
Remote controlled drinker system |
Jun. 5, 2001 |
| 6161573 |
Air pressure regulator |
Dec. 19, 2000 |
| 6035889 |
Low cost absolute pressure controller for plenum pressure regulation |
Mar. 14, 2000 |
| 6019121 |
Pressure reducing valve |
Feb. 1, 2000 |
| 5954484 |
Sewage lifting station |
Sep. 21, 1999 |
| 5937895 |
Fail-safe delivery valve for pressurized tanks |
Aug. 17, 1999 |
| 5934318 |
Valve system |
Aug. 10, 1999 |
| 5819777 |
Flow control device |
Oct. 13, 1998 |
| 5819778 |
Flow control device of power steering system |
Oct. 13, 1998 |
| 5809950 |
Hydraulic valve control arrangement |
Sep. 22, 1998 |
| 5765515 |
Controllable hydraulic valve operating mechanism |
Jun. 16, 1998 |
| 5730182 |
Pressure compensation valve |
Mar. 24, 1998 |
| 5694975 |
Pressure regulator |
Dec. 9, 1997 |
| 5595148 |
Hydraulic valve control device |
Jan. 21, 1997 |
| 5549107 |
Second stage scuba diving regulator |
Aug. 27, 1996 |
| 5409040 |
Springless pilot operated sequence valve |
Apr. 25, 1995 |
| 5323807 |
Stop drop valve |
Jun. 28, 1994 |
| 5280804 |
Control valve |
Jan. 25, 1994 |
| 5271428 |
Adjustable differential pressure valve |
Dec. 21, 1993 |
| 5265645 |
Surge reliever relief valve |
Nov. 30, 1993 |
| 5253669 |
Controlling process gas flow |
Oct. 19, 1993 |
| 5253619 |
Hydraulically powered actuator with pneumatic spring and hydraulic latching |
Oct. 19, 1993 |
| 5193575 |
Adjustable differential pressure valve |
Mar. 16, 1993 |
| 5165493 |
Mud saver valve |
Nov. 24, 1992 |
| 5081909 |
Releasable latch mechanism for attaching an actuator to a valve |
Jan. 21, 1992 |
| 5033505 |
Pressure regulator and method of assembling same |
Jul. 23, 1991 |
| 5022358 |
Low energy hydraulic actuator |
Jun. 11, 1991 |
| 5022359 |
Actuator with energy recovery return |
Jun. 11, 1991 |
| 4966326 |
Air-blasting cartridge |
Oct. 30, 1990 |
| 4949750 |
Surge reliever relief valve |
Aug. 21, 1990 |
| 4949938 |
Connection arrangement |
Aug. 21, 1990 |
| 4915127 |
Compressed gas regulator with pressurized sealed bonnet |
Apr. 10, 1990 |
| 4863101 |
Accelerating slugs of liquid |
Sep. 5, 1989 |
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