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Class Information
Number: 137/625.34
Name: Fluid handling > Systems > Multi-way valve unit > Dividing into parallel flow paths with recombining > Reciprocating > Spool
Description: Devices having a spool type valve (i.e., two port controllers immovably mounted on a single valve stem, said controllers coacting with co-axial seats).

Sub-classes under this class:

Class Number Class Name Patents
137/625.36 Unequal heads 4
137/625.35 With internal passage 31

Patents under this class:

Patent Number Title Of Patent Date Issued
8393344 Microvalve device with pilot operated spool valve and pilot microvalve Mar. 12, 2013
8393355 Short stroke control valve Mar. 12, 2013
8307902 Downhole flow control tool and method Nov. 13, 2012
8245728 Quantum fluid transfer system Aug. 21, 2012
8118112 Rock breaking device, protection valve and a method of operating a rock breaking device Feb. 21, 2012
8006718 Electric spool valve Aug. 30, 2011
7537026 On-off valve May. 26, 2009
7527072 Gas cook-top with glass (capacitive) touch controls and automatic burner re-ignition May. 5, 2009
7503115 Electromagnetic hydraulic valve, in particular a proportional valve for controlling a device for adjusting the rotation angle of a camshaft relative to the crankshaft in an internal combustion Mar. 17, 2009
7458393 Control valve with integrated insert providing valve seat and plug guides Dec. 2, 2008
7455073 Variable flow valve Nov. 25, 2008
7389756 Control valve for an apparatus for variable setting of the control times of gas exchange valves of an internal combustion engine Jun. 24, 2008
6968816 Oil flow control valve Nov. 29, 2005
6966285 Engine valve actuation control and method Nov. 22, 2005
6935290 Avoid drawing air into VCT chamber by exhausting oil into an oil ring Aug. 30, 2005
6928967 Electromagnetic hydraulic valve, in particular a proportional valve for controlling device for adjusting the rotation angle of a camshaft relative to the crankshaft in an internal combustion e Aug. 16, 2005
6889641 Camshaft control device and control valve with leakage compensation May. 10, 2005
6851451 Method and apparatus for manufacturing a valve body Feb. 8, 2005
6752734 Switch valve Jun. 22, 2004
6615868 Spool valve Sep. 9, 2003
6408882 Diverter valve Jun. 25, 2002
6397890 Variable metering fluid control valve Jun. 4, 2002
6386234 Overtravel-double seat magnetic valve May. 14, 2002
6286550 Valve apparatus Sep. 11, 2001
6230742 Poppet valve assembly apparatus having two simultaneously-seating heads May. 15, 2001
6098622 Airway valve to facilitate re-breathing, method of operation, and ventilator circuit so equipped Aug. 8, 2000
6027095 Pipe breakage safety valve Feb. 22, 2000
5918616 Apparatus and method of controlling gas flow Jul. 6, 1999
5803118 Metered feed valve Sep. 8, 1998
5598871 Static and dynamic pressure balance double flow three-way control valve Feb. 4, 1997
5509447 2/2 directional seat valve Apr. 23, 1996
5456445 Cylinder gas valve Oct. 10, 1995
5388613 Valve with pressure compensation Feb. 14, 1995
5271430 Flow rate control valve device and flow force reduction structure Dec. 21, 1993
5261453 Valve provided with sound-reducing means Nov. 16, 1993
5168898 Valve apparatus Dec. 8, 1992
5147333 Needleless injection port with automatic backcheck valve Sep. 15, 1992
5057214 Filtration and backwash control system for water filters associated with spigot faucets Oct. 15, 1991
5010923 Structure of an electromagnetic valve for opening and closing a fluid flow passage Apr. 30, 1991
4898427 Neutral stop device Feb. 6, 1990
4616675 Solenoid-actuated directional control valve Oct. 14, 1986
4586536 Flow control valve May. 6, 1986
4450868 Freeze protection apparatus for solar collectors May. 29, 1984
4450866 Device for controlling a flowthrough cross section in a control line May. 29, 1984
4367140 Reverse osmosis liquid purification apparatus Jan. 4, 1983
4314585 Proportional type electromagnetic valve Feb. 9, 1982
4087967 Sleeve spool valve May. 9, 1978
4076172 Temperature responsive valve assembly Feb. 28, 1978
4040675 Anti-theft vehicle brake-supervising device Aug. 9, 1977

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