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Class Information
Number: 137/88
Name: Fluid handling > Self-proportioning or correlating systems > Mixture condition maintaining or sensing
Description: Systems in which a condition of a fluid mixture is maintained by controlling the flow of at least one of the fluids mixed in response to a means which sense the condition of the mixture.

Sub-classes under this class:

Class Number Class Name Patents
137/93 By optical or chemical property 183
137/91 By specific gravity 40
137/92 By viscosity or consistency 69
137/89 Dividing and recombining flow 20

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8689895 Pilot valve, method of using, and fluid system equipped therewith Apr. 8, 2014
8613325 Compressed gas foam system Dec. 24, 2013
8600568 Fluid flow management system and associated methods Dec. 3, 2013
8594851 Wastewater collection flow management system and techniques Nov. 26, 2013
8584693 Device for monitoring gas concentration and method using the device Nov. 19, 2013
8568934 Mixing system for inerting a gas volume Oct. 29, 2013
8507382 Systems and methods for delivery of fluid-containing process material combinations Aug. 13, 2013
8444041 Brazing system and method May. 21, 2013
8251569 Automated solution maker apparatus Aug. 28, 2012
8245978 Multiple ASM OBIGGS with different permeability and selectivity membranes Aug. 21, 2012
8162068 Pilot valve, method of using, and fluid system equipped therewith Apr. 24, 2012
8147570 Systems and methods for producing fuel compositions Apr. 3, 2012
8091575 Valve system Jan. 10, 2012
8043556 Ablutionary installations Oct. 25, 2011
8020573 Microfluidic channels and reservoirs in portable electronic devices Sep. 20, 2011
7905245 Dosing control system and method Mar. 15, 2011
7810987 Automated solution maker apparatus Oct. 12, 2010
7793675 In-line gas purity monitoring and control system Sep. 14, 2010
7740181 Method and device for regulating the temperature of mixed water Jun. 22, 2010
7686499 Control system design for a mixing system with multiple inputs Mar. 30, 2010
7681803 Perfected device for taking showers at alternating temperatures Mar. 23, 2010
7611068 Temperature adjustment handle autorotation prevention device of automatic water mixing valve Nov. 3, 2009
7543645 Method for servicing a well bore using a mixing control system Jun. 9, 2009
7494263 Control system design for a mixing system with multiple inputs Feb. 24, 2009
7448102 Method for controlling mixtures especially for fabric processing Nov. 11, 2008
7438079 In-line gas purity monitoring and control system Oct. 21, 2008
7416903 Wavy interface mixer Aug. 26, 2008
7353874 Method for servicing a well bore using a mixing control system Apr. 8, 2008
7201179 Modular fluid supply system Apr. 10, 2007
7192559 Methods and devices for high throughput fluid delivery Mar. 20, 2007
7188637 Methods, systems, and articles for controlling a fluid blending system Mar. 13, 2007
7090017 Low cost method and apparatus for fracturing a subterranean formation with a sand suspension Aug. 15, 2006
6883957 On chip dilution system Apr. 26, 2005
6704617 Automated system for control and diagnostics for dispensing systems Mar. 9, 2004
6571817 Pressure proving gas valve Jun. 3, 2003
6561217 Rotary mixing solenoid valve for temperature-control May. 13, 2003
6439253 System for and method of monitoring the flow of semiconductor process gases from a gas delivery system Aug. 27, 2002
6415808 Apparatus and method for controllably delivering fluid to a second fluid stream Jul. 9, 2002
6394641 Preparation of standard gas mixtures May. 28, 2002
6395180 Method and apparatus for preparing liquid dialysate May. 28, 2002
6382227 Production of constant composition gas mixture streams May. 7, 2002
6303501 Gas mixing apparatus and method Oct. 16, 2001
6293634 Spring bar solenoid in ABS brake system Sep. 25, 2001
6253780 Method for preparing a welding fluid of constant physico-chemical characteristics with time, and a plant for its preparation Jul. 3, 2001
6253779 Blending system and method using an auxiliary measuring device Jul. 3, 2001
6224778 Method for manufacturing a system for mixing fluids May. 1, 2001
6220267 Apparatus and method for controllably delivering fluid to a second fluid stream Apr. 24, 2001
6208913 Chemical injection system Mar. 27, 2001
6086753 System for eliminating gases in a container Jul. 11, 2000
6068012 Performance-based control system May. 30, 2000

1 2 3 4

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