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Class Information
Number: 137/2
Name: Fluid handling > Processes > With control of flow by a condition or characteristic of a fluid
Description: Processes in which one or more conditions or characteristics of a fluent material are determined and used to control the system in such a manner as to cause delivery of controlled quantities of a fluent material at a part of the system.

Sub-classes under this class:

Class Number Class Name Patents
137/12 By fluid pressure 224
137/10 By speed of fluid 48
137/9 For producing proportionate flow 75
137/8 For producing uniform flow 84
137/11 For regulating boiler feed water level 7
137/3 Mixing of plural fluids of diverse characteristics or conditions 251

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8684028 Fuel quality traceable and remote system Apr. 1, 2014
8651138 Tubular array for fluidic focusing with integrated optical access region Feb. 18, 2014
8651127 Method for operating a sanitary tank for a rail vehicle Feb. 18, 2014
8615329 Control system for regulating liquid flow Dec. 24, 2013
8594851 Wastewater collection flow management system and techniques Nov. 26, 2013
8592221 Manipulation of fluids, fluid components and reactions in microfluidic systems Nov. 26, 2013
8580198 Automatic analyzer Nov. 12, 2013
8554379 Irrigation system and method for operating thereof Oct. 8, 2013
8517039 Fluid pressure control assembly Aug. 27, 2013
8489244 Method, controller and system for controlling the slug flow of a multiphase fluid Jul. 16, 2013
8483884 Model airplane automatic fuel pump controller apparatus Jul. 9, 2013
8463446 Operating method for a cooling section having centralized detection of valve characteristics and objects corresponding thereto Jun. 11, 2013
8436219 Method of generating a non-plugging hydrate slurry May. 7, 2013
8430099 Apparatus, systems and method for collecting and reclaiming anaesthetic agents and for removing nitrous oxide from exhaust gases Apr. 30, 2013
8424551 Heat transfer apparatus and method Apr. 23, 2013
8404123 Fabrication of enclosed nanochannels using silica nanoparticles Mar. 26, 2013
8397739 N-channel flow ratio controller calibration Mar. 19, 2013
8360335 Valves and methods for regulating the flow rate of a liquid to a fixture Jan. 29, 2013
8337778 Method and apparatus for fluid dispersion Dec. 25, 2012
8306762 Systems and methods for analysis of downhole data Nov. 6, 2012
8290629 Airflow management Oct. 16, 2012
8271211 Method and apparatus for enhancing in-situ gas flow measurement performance Sep. 18, 2012
8271210 Method and apparatus for enhancing in-situ gas flow measurement performance Sep. 18, 2012
8265888 Method and apparatus for enhancing in-situ gas flow measurement performance Sep. 11, 2012
8265794 Knowledge based valve control method Sep. 11, 2012
8261776 Sound pressure level feedback control Sep. 11, 2012
8265795 Mass flow controller Sep. 11, 2012
8241034 Fuel selection valve assemblies Aug. 14, 2012
8205629 Real time lead-line characterization for MFC flow verification Jun. 26, 2012
8196596 Method for tracking pollution source in process water Jun. 12, 2012
8175754 Configuration of a multivariable process fluid flow device May. 8, 2012
8147774 Micro passage chip and fluid transferring method Apr. 3, 2012
8141847 Method for controlling or regulating a vacuum valve Mar. 27, 2012
8131400 Adaptive on-tool mass flow controller tuning Mar. 6, 2012
8091572 Method for tracking pollution source in process water Jan. 10, 2012
8091252 Method of controlling gas valve of dryer Jan. 10, 2012
8048226 Method and system for improving deposition uniformity in a vapor deposition system Nov. 1, 2011
8036780 Flow controller and test method therefor, and flow control method Oct. 11, 2011
7998115 Dialysis system having optical flowrate detection Aug. 16, 2011
7988813 Dynamic control of process chemistry for improved within-substrate process uniformity Aug. 2, 2011
7979165 Mass flow rate control apparatus, its calibration method and semiconductor-producing apparatus Jul. 12, 2011
7974741 Managing information related to industrial equipment Jul. 5, 2011
7957841 Method of calculating pump flow rates and an automated pump control system Jun. 7, 2011
7931817 Additive dispensing device and a thermally activated additive dispensing filter having the additive dispensing device Apr. 26, 2011
7905243 No-drip check valves Mar. 15, 2011
7849869 Method for water hammerless opening of fluid passage, and method for supplying chemical solutions and device for water hammerless opening for which the method is used Dec. 14, 2010
7849890 Apparatus for and methods of draining an enclosure Dec. 14, 2010
7814936 Sound pressure level feedback control Oct. 19, 2010
7806235 Environmental compressor protection assembly Oct. 5, 2010
7743783 Method and apparatus for recycling process fluids Jun. 29, 2010

1 2 3 4 5 6

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