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Class Information
Number: 251/210
Name: Valves and valve actuation > Sequential opening or closing of serial ports in single flow line (e.g., anti-scoring)
Description: Devices in which a single flow line has a plurality of serially associated flow controlling positions which are sequentially closed or opened by a valve unit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7455076 |
Apparatus and method for controlling exhaust pressure in semiconductor manufacturing |
Nov. 25, 2008 |
| 7418998 |
Chamber sealing valve |
Sep. 2, 2008 |
| 7409964 |
Faucet type valve with backflow control in handle structure |
Aug. 12, 2008 |
| 7210667 |
Redundant testable valve apparatus |
May. 1, 2007 |
| 7201187 |
Low-flow valve |
Apr. 10, 2007 |
| 7147000 |
Covering device for drain |
Dec. 12, 2006 |
| 7108013 |
Relief valve assembly |
Sep. 19, 2006 |
| 6959718 |
Valve |
Nov. 1, 2005 |
| 6790548 |
Staged venting of fuel cell system during rapid shutdown |
Sep. 14, 2004 |
| 6685167 |
Double-seated shutoff valve |
Feb. 3, 2004 |
| 6655653 |
Method and mechanism to reduce flow forces in hydraulic valves |
Dec. 2, 2003 |
| 6375154 |
Seat and holding valve |
Apr. 23, 2002 |
| 6286770 |
Fuel injection of an improved type |
Sep. 11, 2001 |
| 6206021 |
Sleeve valve with clean out section |
Mar. 27, 2001 |
| 6192920 |
Chain link float valve |
Feb. 27, 2001 |
| 6095186 |
Plural valve seating arrangement |
Aug. 1, 2000 |
| 5878771 |
Precision gas blender |
Mar. 9, 1999 |
| 5878993 |
Shielded globe valve seal mechanism |
Mar. 9, 1999 |
| 5791631 |
Valving assembly |
Aug. 11, 1998 |
| 5618025 |
Protected soft seat with secondary hard seat |
Apr. 8, 1997 |
| 5603483 |
Solenoid valve |
Feb. 18, 1997 |
| 5540251 |
Precision gas blender |
Jul. 30, 1996 |
| 5462253 |
Dual slope flow control valve |
Oct. 31, 1995 |
| 5454546 |
Water faucet mechanism |
Oct. 3, 1995 |
| 5445143 |
Humidifier with dual float valves |
Aug. 29, 1995 |
| 5431188 |
Flow trim for choke |
Jul. 11, 1995 |
| 5364066 |
Dual port valve with stepper motor actuator |
Nov. 15, 1994 |
| 5358212 |
Poppet valve having external adjustment for a flow restrictor |
Oct. 25, 1994 |
| 5201490 |
Valve with a floating stop seal for high flow rates |
Apr. 13, 1993 |
| 5170990 |
Vacuum valve and a vacuum treating apparatus in which said vacuum valve is used |
Dec. 15, 1992 |
| 5135032 |
Slurry gate valve |
Aug. 4, 1992 |
| 5103866 |
Poppet valve and valve assemblies utilizing same |
Apr. 14, 1992 |
| 5007614 |
Pressure responsive two-way shut-off valve |
Apr. 16, 1991 |
| 4911403 |
Pressure responsive two-way shut-off valve |
Mar. 27, 1990 |
| 4856711 |
Double seal thermostat |
Aug. 15, 1989 |
| 4850392 |
Double poppet relief valve |
Jul. 25, 1989 |
| 4817665 |
Safety valve |
Apr. 4, 1989 |
| 4779647 |
Adjustable valve |
Oct. 25, 1988 |
| 4778149 |
Silent valve |
Oct. 18, 1988 |
| 4757973 |
Control valve for a fuel injector |
Jul. 19, 1988 |
| 4738282 |
Zero leakage valve |
Apr. 19, 1988 |
| 4722507 |
Piston sealing ring apparatus |
Feb. 2, 1988 |
| 4711266 |
Valve arrangement |
Dec. 8, 1987 |
| 4703914 |
Valve joint for fluid systems |
Nov. 3, 1987 |
| 4688757 |
Soft seat Y pattern globe valve |
Aug. 25, 1987 |
| 4682759 |
Relief valve for hydraulic systems |
Jul. 28, 1987 |
| 4669702 |
Erosion resistant soft seated valve trim |
Jun. 2, 1987 |
| 4659060 |
Stem tip seal |
Apr. 21, 1987 |
| 4659061 |
Seal ring shutoff stem tip |
Apr. 21, 1987 |
| 4557463 |
Erosion resistant soft seated valve trim |
Dec. 10, 1985 |
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