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Class Information
Number: 251/121
Name: Valves and valve actuation > With material guide or restrictor > Movable or resilient guide or restrictor > Adjustable guide or restrictor
Description: Subject matter wherein the movable guide or restrictor is adjustable, i.e., may be put into a different position or relation with respect to its mounting and/or actuator for the purpose of securing a different character or rate of flow when flow subsequently occurs.










Sub-classes under this class:

Class Number Class Name Patents
251/122 Tapered metering plug 231


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8540210 Low friction and gradually opening butterfly valve vane Sep. 24, 2013
8402996 Adjustable choke for oil and gas industry Mar. 26, 2013
8220775 Flow connector for a valve Jul. 17, 2012
8152134 Valve with regulating function Apr. 10, 2012
8136547 Poppet valve with diverging-converging flow passage and method to reduce total pressure loss Mar. 20, 2012
8083936 Reducing waste water in reverse osmosis residential drinking water systems Dec. 27, 2011
8052064 Expansion valve with refrigerant flow dividing structure and refrigeration unit utilizing the same Nov. 8, 2011
8011640 Air valve adjusting switch assembly Sep. 6, 2011
7992591 Magnetically actuated microfluidic mixers Aug. 9, 2011
7942166 Devices for delivering gas May. 17, 2011
7875109 Integral flow restrictor valve Jan. 25, 2011
7850143 Ball valve assembly Dec. 14, 2010
7832653 Expansion valve having a grooved valve member and refrigeration device including the same Nov. 16, 2010
7828264 Flow control valve Nov. 9, 2010
7815164 Low noise valve assembly Oct. 19, 2010
7815163 Design of a noise suppression wedge for a butterfly outflow valve Oct. 19, 2010
7811067 Air driven pump with performance control Oct. 12, 2010
7789373 Ball poppet valve with contoured control stem Sep. 7, 2010
7681861 Dosage feed device for additive fluids Mar. 23, 2010
7549911 Media control valve with pressure balance loop Jun. 23, 2009
7527239 Control valve assembly for spray guns May. 5, 2009
7513441 Valve for controlling a connection in a high-pressure fuel injection apparatus for an internal combustion engine Apr. 7, 2009
7490627 Butterfly valve with water-filling function Feb. 17, 2009
7438275 Ball valve for use in heating or cooling systems Oct. 21, 2008
7364131 Non-return valve for use in a molding system Apr. 29, 2008
7322559 Plug valve having high flow resolution Jan. 29, 2008
7296780 Control valve assembly structure for spray guns Nov. 20, 2007
7234680 Combination valve and regulator with vented seat for use with pressurized gas cylinders, particularly oxygen cylinders Jun. 26, 2007
7213609 Control system for high pressure oil wells May. 8, 2007
7201188 Fluted reciprocating ball valve Apr. 10, 2007
7201186 Electronic valve for flow regulation on a cooking burner Apr. 10, 2007
7159602 Flow-measuring valve device and method Jan. 9, 2007
7152844 Conical valve for cryogenic media Dec. 26, 2006
7147203 Fluid control Dec. 12, 2006
7114699 Combination valve and regulation for use with pressurized gas cylinders, particularly oxygen cylinders Oct. 3, 2006
7036789 Distribution valve comprising a flowmeter for installing in an inlet May. 2, 2006
6935616 Balanced plug valve Aug. 30, 2005
6889702 Replaceable valve seat ring with enhanced flow design May. 10, 2005
6834672 Air pressure and flow regulating valve and pneumatic tool Dec. 28, 2004
6832619 Method to reduce flow forces in hydraulic valves Dec. 21, 2004
6827330 Pressure regulating valve for a refrigerating plant Dec. 7, 2004
6808162 Rotary 2-way servovalve Oct. 26, 2004
6776191 Spool valve device Aug. 17, 2004
6769666 Variable port valve plug Aug. 3, 2004
6730232 Process and device for separating impurities from a suspension by flotation May. 4, 2004
6655653 Method and mechanism to reduce flow forces in hydraulic valves Dec. 2, 2003
6623338 Method of abrading silicon substrate Sep. 23, 2003
6623335 Method of forming ink fill slot of ink-jet printhead Sep. 23, 2003
6609697 Vacuum control valve Aug. 26, 2003
6607007 Cylinder valve and bayonet check-filter with excess-flow protection feature Aug. 19, 2003

1 2 3 4 5










 
 
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