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Class Information
Number: 137/625.12
Name: Fluid handling > Systems > Multi-way valve unit > Sequentially progressive opening or closing of plural ports
Description: Devices in which a plurality of ports are sequentially progressively opened or closed by a valve unit.

Sub-classes under this class:

Class Number Class Name Patents
137/625.13 With subsequent closing of first port 21

Patents under this class:

Patent Number Title Of Patent Date Issued
8544501 Indexing arrangement Oct. 1, 2013
8474482 Plumbing shutoff or switching valve Jul. 2, 2013
8302630 Gate valve with equalizer port Nov. 6, 2012
7699148 Damping valve assembly with a progressive damping force characteristic Apr. 20, 2010
7681593 Sequential distributor of gases and liquids Mar. 23, 2010
7363942 Continuous automatic control and distributor valve, with a magnetic seal Apr. 29, 2008
6968816 Oil flow control valve Nov. 29, 2005
6722131 Fuel control valve Apr. 20, 2004
6499506 Vacuum distribution controller apparatus Dec. 31, 2002
6453929 Rotary wash valve Sep. 24, 2002
6318357 Gas burner configuration for cooking areas Nov. 20, 2001
6314998 Fuel divider and ecology system for a gas turbine engine Nov. 13, 2001
6206342 Seat valve having rotating closure member for variable pressure control Mar. 27, 2001
6056873 Management of a body of water May. 2, 2000
6047733 Method and apparatus for selectively drawing air from a plurality of vacuum channels Apr. 11, 2000
5974827 Refrigerant thermostatic valve Nov. 2, 1999
5746251 Multi-port fluid valve May. 5, 1998
5727434 Circular saw air table Mar. 17, 1998
5578016 Stopcock Nov. 26, 1996
5391353 Metering device with radial arrangement of valves Feb. 21, 1995
5351717 High differential pressure control valve Oct. 4, 1994
5193237 Pneumatic wheel chair cushion for reducing ischemic injury Mar. 16, 1993
5141210 Longitudinally adjustable gas spring Aug. 25, 1992
5080133 Control valve assembly Jan. 14, 1992
4957706 Device for preserving sterility during sampling from culture medium containers Sep. 18, 1990
4880031 Heater and air conditioning control system Nov. 14, 1989
4764780 Ink ejection recording apparatus having means for equalizing the static ink pressures of a plurality of ink nozzles arranged at different heights Aug. 16, 1988
4483369 Linear motor-actuated flow control valve Nov. 20, 1984
4444337 Apparatus for proportioning fluids Apr. 24, 1984
4420981 Manometer switching valve Dec. 20, 1983
4327864 Multiple function pneumatic thermostat May. 4, 1982
4254797 Apparatus for producing calibration gases suitable for analytical instrumentation Mar. 10, 1981
4243063 Mixing valve Jan. 6, 1981
4196634 Valve device for selectively connecting a pressure gauge to a plurality of pressure lines Apr. 8, 1980
4179980 Hydraulic brake booster Dec. 25, 1979
4177833 Valves having a pressure equalizer across dual face seals Dec. 11, 1979
4175909 Valve means for use in controlling operation of a hydraulic motor Nov. 27, 1979
4146594 Fuel flow control device Mar. 27, 1979
4116217 Deflation valve for blood pressure measuring devices Sep. 26, 1978
4082111 Load responsive fluid control valve Apr. 4, 1978
4028889 Load responsive fluid control system Jun. 14, 1977
4020748 Valve structure for hydraulic control system May. 3, 1977
3984979 Load responsive fluid control valves Oct. 12, 1976
3973591 Multi-port control valve Aug. 10, 1976
3957639 Fluid flow modulator May. 18, 1976

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