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Class Information
Number: 137/628
Name: Fluid handling > Systems > Sequentially progressive opening or closing of plural valves
Description: Subject matter in which two or more valves are so arranged or actuated that one valve starts to open or close prior to another concurrently opening or closing valve.










Sub-classes under this class:

Class Number Class Name Patents
137/630.19 Lost motion 31
137/629 Pressure equalizing or auxiliary shunt flow 47
137/630.18 Screw-actuated differential valves 4
137/630.16 With subsequent closing of first opened port 9


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8567442 Soft start device for pneumatic systems and method for the operation of a soft start device Oct. 29, 2013
8534319 Serial siphon valves for fluidic or microfluidic devices Sep. 17, 2013
8413685 Control valve Apr. 9, 2013
8409357 Self-cleaning apparatus and method for thick slurry pressure control Apr. 2, 2013
8347916 Self-sealing chemical injection line coupling Jan. 8, 2013
8286937 Tubular valve device Oct. 16, 2012
8113268 Sequential valve member driving mechanism for an HVAC system Feb. 14, 2012
8070844 Dust clearing blow-back valve and reservoir Dec. 6, 2011
8028719 Control stop and flushing system Oct. 4, 2011
7699073 Soft start device for compressed air systems Apr. 20, 2010
7476209 Method and apparatus for collecting a blood component and performing a photopheresis treatment Jan. 13, 2009
7347221 Solenoid valve Mar. 25, 2008
7331398 Multi-drop flow control valve system Feb. 19, 2008
7159616 Dual path hydraulic coupling Jan. 9, 2007
6981688 Flow control device Jan. 3, 2006
6974120 Solenoid fuel drain valve Dec. 13, 2005
6959726 Valve assembly for attenuating bounce of hydraulically driven members of a machine Nov. 1, 2005
6845786 Spigot valve Jan. 25, 2005
6748977 Valve Jun. 15, 2004
6530391 Temperature activated valve Mar. 11, 2003
6520157 High-pressure injector with reduced leakage Feb. 18, 2003
6497244 Fluid flow proportioning device Dec. 24, 2002
6470914 Switch device for gas burner Oct. 29, 2002
6328222 Pulsed air assist valve module Dec. 11, 2001
6296016 Double obturator valve Oct. 2, 2001
6200111 Controllable high volume positive displacement pump Mar. 13, 2001
6192920 Chain link float valve Feb. 27, 2001
6167869 Fuel injector utilizing a multiple current level solenoid Jan. 2, 2001
6047718 Solenoid valve having coaxial armatures in a single coil design Apr. 11, 2000
6029705 Gas control valve Feb. 29, 2000
5941280 Pneumatically driven train brake pipe pressure exhaust valve Aug. 24, 1999
5881768 Combination motor/pneumatic driven train brake pipe pressure exhaust valve Mar. 16, 1999
5799698 Switch for gas burner Sep. 1, 1998
5704386 Multistage regulating valve Jan. 6, 1998
5662083 Metering device for air assisted fuel injection Sep. 2, 1997
5518024 Overfill prevention device for storage tanks May. 21, 1996
5293914 Hydraulic control circuit for a delimbing apparatus Mar. 15, 1994
4794953 Torch device with oxygen and combustion gas supply Jan. 3, 1989
4742851 Dripless faucet for beverage containers May. 10, 1988
4551072 Fluid pressure operated actuator Nov. 5, 1985
4438782 Isolation steam valve with atmospheric vent and relief capability Mar. 27, 1984
4437830 Burner and pilot valve safety control system Mar. 20, 1984
4425930 Fluid flow control apparatus and method Jan. 17, 1984
4349200 Gas gun for ballistic testing Sep. 14, 1982
4305469 Fire extinguishing system having a discharge valve and a distribution valve actuated by a pneumatic actuator Dec. 15, 1981
4281685 Electromagnetic locking type actuator Aug. 4, 1981
4276237 Carburetor air control device Jun. 30, 1981
4272013 Vent control arrangement for combustion apparatus Jun. 9, 1981
4266574 Vent valve May. 12, 1981
4227548 Multiple control valve for mixing fluids Oct. 14, 1980

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