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Class Information
Number: 137/101.19
Name: Fluid handling > Self-proportioning or correlating systems > Self-proportioning flow systems > Flow comparison or differential response > With electrical controller
Description: Subject matter comprising an electrical controller responsive to the sensing means.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8600568 Fluid flow management system and associated methods Dec. 3, 2013
8594851 Wastewater collection flow management system and techniques Nov. 26, 2013
8496022 Device and method for supplying gas while dividing to chamber from gas supplying facility equipped with flow controller Jul. 30, 2013
8475550 Self-optimizing odorant injection system Jul. 2, 2013
8464741 Flow control method for multizone gas distribution Jun. 18, 2013
8397739 N-channel flow ratio controller calibration Mar. 19, 2013
8349038 Self optimizing odorant injection system Jan. 8, 2013
8313701 Liquid vacuum chemical feeder system Nov. 20, 2012
8281796 Slurry catalyst flow splitters and methods of using the same Oct. 9, 2012
8220660 Systems and methods for supplying and/or dispensing fluid Jul. 17, 2012
8091575 Valve system Jan. 10, 2012
7980264 Slurry catalyst flow splitters and methods of using the same Jul. 19, 2011
7776275 Chemical feeder system and method Aug. 17, 2010
7740031 System for blending and compressing gases Jun. 22, 2010
7156115 Method and apparatus for flow control Jan. 2, 2007
7007707 Mass flow ratio system and method Mar. 7, 2006
6955535 Array for an automatic firing device for a gas or oil burner Oct. 18, 2005
6857443 Electronic gas blender and gas flow control mechanism therefor Feb. 22, 2005
6662817 Gas-line system for semiconductor-manufacturing apparatus Dec. 16, 2003
6662818 Programmable tracking pressure regulator for control of higher pressures in microfluidic circuits Dec. 16, 2003
6591850 Method and apparatus for fluid flow control Jul. 15, 2003
6571817 Pressure proving gas valve Jun. 3, 2003
6543469 System for continuously manufacturing a composite preform Apr. 8, 2003
6418954 System and method for dividing flow Jul. 16, 2002
6253779 Blending system and method using an auxiliary measuring device Jul. 3, 2001
6227227 Single meter blending fuel dispensing system May. 8, 2001
6148839 Apparatus and method for injecting liquid additives into agricultural and industrial water supplies Nov. 21, 2000
6142162 System and method for odorizing natural gas Nov. 7, 2000
6129106 Proportioning valve and control means therefor Oct. 10, 2000
6116259 Method and apparatus for measuring and adjustably controlling vapor-liquid mixing ratio at pipe junctions Sep. 12, 2000
6098646 Dispensing system with multi-port valve for distributing use dilution to a plurality of utilization points and position sensor for use thereon Aug. 8, 2000
6006775 Fuel dispensing system using a common meter and octane sensing Dec. 28, 1999
5887611 Gas blender Mar. 30, 1999
5746238 Liquid chemical dilution and dosing system May. 5, 1998
5722449 Arrangement in connection with a gas mixer Mar. 3, 1998
5647391 Sensing arrangement for sensing the addition of reactants to a solution Jul. 15, 1997
5641006 Liquid supply apparatus and method of operation Jun. 24, 1997
5609180 Liquid alkali system for fiber reactive dyeing Mar. 11, 1997
5537914 Beverage blending and proportioning Jul. 23, 1996
5481968 Apparatus for continuous multiple stream density or ratio control Jan. 9, 1996
5479957 Sludge pipeline lubrication system Jan. 2, 1996
5476115 Automatic gas blending system Dec. 19, 1995
5464283 Method and apparatus for forming and dispensing coating material containing multiple components Nov. 7, 1995
5407267 Method and apparatus for forming and dispensing coating material containing multiple components Apr. 18, 1995
5361797 Sludge pipeline lubrication system Nov. 8, 1994
5325852 Method and apparatus for adjusting the density of a liquid Jul. 5, 1994
5299594 Liquid flow rate detector Apr. 5, 1994
5293892 Solar powered injection device and method Mar. 15, 1994
5246026 Fluid measuring, dilution and delivery system Sep. 21, 1993
5033671 Hot-water and cold-water mixing device Jul. 23, 1991

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