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Class Information
Number: 251/62
Name: Valves and valve actuation > Fluid actuated or retarded > Piston type expansible chamber reciprocating valve actuator
Description: Subject matter in which the valve includes a reciprocating fluid control member and the actuator comprises an expansible chamber device having as a working member either a cylinder or a piston, relatively movable therein, the cylinder and piston forming an expansible chamber, the volume of the expansible chamber changing with a corresponding relative movement of the piston and cylinder in response to the supply of control fluid to the chamber, such relative movement effecting actuation of the control member.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7552774 |
Control line hydrostatic minimally sensitive control system |
Jun. 30, 2009 |
| 7527238 |
Protection structure for rod seal member of two-port valve |
May. 5, 2009 |
| 7467778 |
Slurry tolerant pilot operated relief valve |
Dec. 23, 2008 |
| 7455279 |
Hydraulic control valve with integrated dual actuators |
Nov. 25, 2008 |
| 7448591 |
Step ratchet mechanism |
Nov. 11, 2008 |
| 7445019 |
Gate valve having service position |
Nov. 4, 2008 |
| 7401759 |
Single-effect submarine actuator for operating valves |
Jul. 22, 2008 |
| 7343927 |
Blocking element, especially an explosion protection valve |
Mar. 18, 2008 |
| 7204211 |
Arrangement of an internal combustion engine poppet valve and an actuator therefor |
Apr. 17, 2007 |
| 7195225 |
Rotary valve assembly |
Mar. 27, 2007 |
| 7155896 |
Combustor drain valve |
Jan. 2, 2007 |
| 7059283 |
System and method of retaining hydraulic fluid in a hydraulic valve actuation system |
Jun. 13, 2006 |
| 7059545 |
Automatic air-assisted manifold mounted gun |
Jun. 13, 2006 |
| 7033256 |
Abrasive fluid jet machining apparatus |
Apr. 25, 2006 |
| 7014164 |
Device for protection against explosions in pipe-line |
Mar. 21, 2006 |
| 7000890 |
Pressure compensated shear seal solenoid valve |
Feb. 21, 2006 |
| 6968855 |
Air operated fluid control valve |
Nov. 29, 2005 |
| 6942192 |
Gate valve with flow-through gate |
Sep. 13, 2005 |
| 6935355 |
Small scale actuators and methods for their formation and use |
Aug. 30, 2005 |
| 6899316 |
Closure device for vacuum closure of at least one opening in a wall |
May. 31, 2005 |
| 6896003 |
High efficiency low actuation force inlet door |
May. 24, 2005 |
| 6896236 |
Controlled leakage hydraulic damper |
May. 24, 2005 |
| 6886511 |
Lost motion assembly for a poppet valve of an internal combustion engine |
May. 3, 2005 |
| 6871618 |
Valve actuating device, and method for controlling same |
Mar. 29, 2005 |
| 6854705 |
Flow control valve that may be used for mold temperature control systems |
Feb. 15, 2005 |
| 6840494 |
Gate valve with flow-through gate |
Jan. 11, 2005 |
| 6775990 |
Methods and apparatus for regulating gas turbine engine fluid flow |
Aug. 17, 2004 |
| 6755388 |
Pinch valve |
Jun. 29, 2004 |
| 6679472 |
Pressure balanced choke and kill connector |
Jan. 20, 2004 |
| 6651950 |
Valve for controlling liquids |
Nov. 25, 2003 |
| 6622983 |
Particle control valve |
Sep. 23, 2003 |
| 6612537 |
Cartridge gate valve |
Sep. 2, 2003 |
| 6598849 |
Pressure compensation/control for fail-safe gate valve |
Jul. 29, 2003 |
| 6564819 |
Fluid flow control damper assembly |
May. 20, 2003 |
| 6561479 |
Small scale actuators and methods for their formation and use |
May. 13, 2003 |
| 6516888 |
Device and method for regulating fluid flow in a well |
Feb. 11, 2003 |
| 6467364 |
Coupling apparatus for rotating a rotatable part with a movable slide |
Oct. 22, 2002 |
| 6453725 |
Gas chromatograph sample and column-switching valve |
Sep. 24, 2002 |
| 6443421 |
Poppet valve with sleeve |
Sep. 3, 2002 |
| 6443707 |
Control valve for variable displacement compressor |
Sep. 3, 2002 |
| 6431518 |
Vacuum valve |
Aug. 13, 2002 |
| 6422530 |
Fail-safe fluid actuator |
Jul. 23, 2002 |
| 6405535 |
Turbocharger with wastegate actuator |
Jun. 18, 2002 |
| 6378783 |
Automatic gun with a membrane for spraying a product |
Apr. 30, 2002 |
| 6347782 |
Axial actuator |
Feb. 19, 2002 |
| 6338466 |
Water well recharge throttle valve |
Jan. 15, 2002 |
| 6318402 |
Pneumatic tank truck closure apparatus |
Nov. 20, 2001 |
| 6302372 |
Gate valve |
Oct. 16, 2001 |
| 6299133 |
Gate valve |
Oct. 9, 2001 |
| 6274885 |
Active matrix display device with TFTs of different refractive index |
Aug. 14, 2001 |
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