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Class Information
Number: 137/87.03
Name: Fluid handling > Self-proportioning or correlating systems > Flow rate responsive
Description: Subject matter wherein the sensor is detecting the variation in the amount of fluid flowing in one of the flow lines in a set period of time or is detecting the variation in fluid pressure (i.e., pressure differential) along the flow line and in response thereto the sensor controls the flow in the other flow line.










Sub-classes under this class:

Class Number Class Name Patents
137/87.04 Pressure differential 33


Patents under this class:

Patent Number Title Of Patent Date Issued
8453647 Device for pressure equalization on a medical gas delivery means Jun. 4, 2013
8342199 Dispensing equipment utilizing coriolis flow meters Jan. 1, 2013
8043556 Ablutionary installations Oct. 25, 2011
7881829 Mass flow controller Feb. 1, 2011
7287540 Method for introducing drag reducers into hydrocarbon transportation systems Oct. 30, 2007
7156115 Method and apparatus for flow control Jan. 2, 2007
6609534 Multi-additive injection system for aviation fuel Aug. 26, 2003
6567710 Program-controlled fluid supply system and controller therefor May. 20, 2003
5829470 Differential volume sensing hydraulic control Nov. 3, 1998
5507309 Pressure differential regulator Apr. 16, 1996
5257640 Fine pressure control system for high pressure gas Nov. 2, 1993
5232010 Drain valve Aug. 3, 1993
5146943 Apparatus for controlling the flow of a process fluid into a process vessel Sep. 15, 1992
4979529 Valves Dec. 25, 1990
4979639 Beverage dispenser control valve and ratio control method therefor Dec. 25, 1990
4972873 Shuttle valve with spike-apply damping Nov. 27, 1990
4892114 Flow-sensing shutoff valve Jan. 9, 1990
4795129 Normally closed fluid switching logic element Jan. 3, 1989
4616806 Valve Oct. 14, 1986
4616480 Control system for the engagement and disengagement of an exhaust gas turbocharger Oct. 14, 1986
4561513 Steering device for a hydrostatic-drive vehicle, in particular a crawler-mounted earth-moving machine Dec. 31, 1985
4542627 Cooling apparatus for air conditioner and refrigeration systems Sep. 24, 1985
4535797 Automatic shut off valve Aug. 20, 1985
4381816 Self-draining heat exchanger May. 3, 1983
4361189 Automatic fire extinguishing and alarm system for mobile homes Nov. 30, 1982
4305669 Mixing apparatus Dec. 15, 1981
4263971 Fire and explosion suppression apparatus Apr. 28, 1981
4232748 Spray-assisted pneumatic stone-working apparatus Nov. 11, 1980
4196588 Margin valve Apr. 8, 1980
4184505 Fuel flow rate measuring device Jan. 22, 1980
4180088 Water shutoff system Dec. 25, 1979
4166084 Bubble maker Aug. 28, 1979
4159853 Pressure control unit for a vehicular hydraulic braking system Jul. 3, 1979
4109967 Brake-force distributor for dual-circuit brake systems Aug. 29, 1978
4029074 Fuel valves Jun. 14, 1977
4007754 Flow control system Feb. 15, 1977
4000856 Fog/spray system and apparatus Jan. 4, 1977
3974742 Lock valve assembly Aug. 17, 1976











 
 
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