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Class Information
Number: 137/625.37
Name: Fluid handling > Systems > Multi-way valve unit > Dividing into parallel flow paths with recombining > Reciprocating > Piston
Description: Subject matter wherein the valve is of the piston type.










Sub-classes under this class:

Class Number Class Name Patents
137/625.38 With internal flow passage 113


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8485218 Oil pressure regulating valve for generator applications Jul. 16, 2013
8443838 Refrigerant control valves May. 21, 2013
8387666 Noise control for fluid pressure reduction device for high pressure drop ratio Mar. 5, 2013
8267121 Valve assembly for counteracting flow forces Sep. 18, 2012
8267116 Strainer and anti-backflow device for compressors Sep. 18, 2012
8042572 Controllable pressure-reducing valve and device for the generation of pressure change signals Oct. 25, 2011
8011386 Control valve having "C" seal Sep. 6, 2011
RE42633 Spool valve for fluid control Aug. 23, 2011
7959127 Axial trim for dirty service valve Jun. 14, 2011
7699075 Reverse flow flow trim for choke valve Apr. 20, 2010
7681594 Control valve having "C" seal Mar. 23, 2010
7578314 Seal assembly for a fluid pressure control device Aug. 25, 2009
7448409 Fluid flow control device having a throttling element seal Nov. 11, 2008
7195034 Fluid trim apparatus and method Mar. 27, 2007
7104281 Fluid flow regulation Sep. 12, 2006
7069950 Noise abatement module using Herschel-Quincke tubes Jul. 4, 2006
7055548 Control valve trim and seat design for valve trim with minimal unbalanced area Jun. 6, 2006
7013919 Throttle device for high fluid pressures Mar. 21, 2006
7007711 Dispersion nozzle with variable throughput Mar. 7, 2006
6997211 Multiple material valve plug for high temperature operation Feb. 14, 2006
6973941 Control valve with low noise and enhanced flow characteristics Dec. 13, 2005
6935371 High capacity globe valve Aug. 30, 2005
6926032 Pressure-reducing control valve for severe service conditions Aug. 9, 2005
6805162 Erosion reducing valve plug and seat ring Oct. 19, 2004
6637452 Valve with self-cleaning trim Oct. 28, 2003
6536473 Choke valve Mar. 25, 2003
6322052 Ventilation valve Nov. 27, 2001
6161584 High energy loss fluid control device Dec. 19, 2000
6095192 Spool valve for fluid control Aug. 1, 2000
6082405 Valve cone, a valve and a valve manufacturing process Jul. 4, 2000
6076552 Valve structure for hydraulic circuit Jun. 20, 2000
6047734 Valve assembly Apr. 11, 2000
6039076 High energy loss fluid control device Mar. 21, 2000
6024122 Valve and filter therefor Feb. 15, 2000
5964248 Arrangement in regulating valves Oct. 12, 1999
5924673 Method and apparatus for quieting turbulence in a gas flow line valve Jul. 20, 1999
5803119 Fluid flow control device Sep. 8, 1998
5730416 Method and apparatus for quieting turbulence in a gas flow line valve Mar. 24, 1998
5706856 Valve apparatus Jan. 13, 1998
5503184 Pressure control valve Apr. 2, 1996
5427147 Valve for regulating and/or shutting off the flow of liquid in a conduit Jun. 27, 1995
5335694 Flush valve flow control refill ring Aug. 9, 1994
5282577 Cross section controlled multi-jet injection valve Feb. 1, 1994
5277555 Fluid activated double diaphragm pump Jan. 11, 1994
5174422 Transmission equipped with torque converter Dec. 29, 1992
5150736 Valve with crenellated seat Sep. 29, 1992
5141028 Valve assembly Aug. 25, 1992
5086808 Balanced sleeve control choke Feb. 11, 1992
5020571 Noise-reducing valve construction Jun. 4, 1991
5018703 Valve design to reduce cavitation and noise May. 28, 1991

1 2 3










 
 
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