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Class Information
Number: 137/625.39
Name: Fluid handling > Systems > Multi-way valve unit > Dividing into parallel flow paths with recombining > Reciprocating > Piston > With internal flow passage > Sequential opening or closing of serial ports in single flow line
Description: Subject matter including sequential opening or closing of serial ports in a single flow line.










Patents under this class:

Patent Number Title Of Patent Date Issued
8403003 Fluid pressure control device having a throttling element seal Mar. 26, 2013
8171958 Integrated plug/choke valve May. 8, 2012
7789105 Gas pressure regulator Sep. 7, 2010
7661609 Pressure washer with soft start washer wand Feb. 16, 2010
7373951 Control valve having "C" seal May. 20, 2008
7182097 Anti-saturation directional control valve composed of two or more sections with pressure selector compensators Feb. 27, 2007
6968816 Oil flow control valve Nov. 29, 2005
6966285 Engine valve actuation control and method Nov. 22, 2005
6886598 Choke restrictor devices and methods May. 3, 2005
6807985 High rangeability control valve Oct. 26, 2004
6766826 Low noise fluid control valve Jul. 27, 2004
6206021 Sleeve valve with clean out section Mar. 27, 2001
6131612 Valve for a superheated-steam conversion plant Oct. 17, 2000
5964248 Arrangement in regulating valves Oct. 12, 1999
5787860 Valve with combined valve members and fuel--injection system provided with such a valve Aug. 4, 1998
5351717 High differential pressure control valve Oct. 4, 1994
5133383 Axicage multistage choke Jul. 28, 1992
5012841 Pressure reducing and conditioning valves May. 7, 1991
5005605 Conditioning valve Apr. 9, 1991
4819690 Pressure control valve Apr. 11, 1989
4722507 Piston sealing ring apparatus Feb. 2, 1988
4531545 Drilling choke valve Jul. 30, 1985
4508138 Polyjet valve with backwash Apr. 2, 1985
4375821 Control value Mar. 8, 1983
RE30902 Pressure and temperature compensating hydraulic valve Apr. 13, 1982
4235718 Control device for the feeding and for the drainage of a column, column and demineralization station equipped with such a device Nov. 25, 1980
4194534 Pressure and temperature compensating hydraulic valve Mar. 25, 1980
4114694 No-shock pressure plug apparatus Sep. 19, 1978











 
 
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