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Class Information
Number: 137/87.05
Name: Fluid handling > Self-proportioning or correlating systems > Plural sensors
Description: Subject matter including two or more sensors for detecting two distinct or similar conditions or characteristics of the fluid in one of the flow lines and in response thereto the sensors control the flow in the other flow line.

Sub-classes under this class:

Class Number Class Name Patents
137/87.06 For single valve 10

Patents under this class:

Patent Number Title Of Patent Date Issued
8459290 Material gas concentration control system Jun. 11, 2013
8459291 Source gas concentration control system Jun. 11, 2013
8443827 Controlling device for hydraulic consumers May. 21, 2013
8424554 Control valve for a reverse osmosis water purification system Apr. 23, 2013
8381755 Pressure type flow rate control reference and corrosion resistant pressure type flow rate controller used for the same Feb. 26, 2013
6953044 Drained water recovery system and method for operating the same Oct. 11, 2005
6932102 Device for regulating the flow rate and/or the pressure of a fluid Aug. 23, 2005
4979639 Beverage dispenser control valve and ratio control method therefor Dec. 25, 1990
4335736 Double piping type hydraulic pressure control device Jun. 22, 1982
4270613 Fire and explosion detection and suppression system Jun. 2, 1981
4263971 Fire and explosion suppression apparatus Apr. 28, 1981
3938369 Arrangement for controlling the viscosity of a fluid Feb. 17, 1976

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