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Class Information
Number: 137/87.04
Name: Fluid handling > Self-proportioning or correlating systems > Flow rate responsive > Pressure differential
Description: Subject matter wherein the sensor is detecting the variation of the fluid pressures at two distinct points along one of the flow lines and in response thereto the sensor controls the flow in the other flow line.










Patents under this class:

Patent Number Title Of Patent Date Issued
8584691 Additive dispensing system and method Nov. 19, 2013
8584693 Device for monitoring gas concentration and method using the device Nov. 19, 2013
8453647 Device for pressure equalization on a medical gas delivery means Jun. 4, 2013
8267108 Additive dispensing system and method Sep. 18, 2012
7921867 Elbow plug external sleeve valve Apr. 12, 2011
6504474 Method and apparatus for detecting a restricted or bypassed transmission oil filter Jan. 7, 2003
6422009 Pump capacity control device and valve device Jul. 23, 2002
6333689 Apparatus and method for water flow fire alarm Dec. 25, 2001
5979480 Semiconductor production device, method of adjusting its internal pressure and method of processing an object of processing Nov. 9, 1999
5732729 Safety valve Mar. 31, 1998
5727587 Mixer control valve Mar. 17, 1998
5433237 Dedrooped bypass valve Jul. 18, 1995
5277215 Method for supplying and discharging gas to and from semiconductor manufacturing equipment and system for executing the same Jan. 11, 1994
5261437 Method and apparatus for monitoring and analyzing recirculation control system performance Nov. 16, 1993
5261452 Critical orifice dilution system and method Nov. 16, 1993
5259474 Steering force control apparatus for power steering system Nov. 9, 1993
5244358 Load sensed variable output gear pump Sep. 14, 1993
4955350 Fuel injection Sep. 11, 1990
4770094 Control valve for regulating a pressure ratio between two pressure systems Sep. 13, 1988
4530371 Control of fluid pressure circuits Jul. 23, 1985
RE31785 Breathing valve assembly with diaphragm control of the exhaust ports Jan. 1, 1985
4431019 Fluid flow control device Feb. 14, 1984
4321939 Multi-liquid flow proportioning device Mar. 30, 1982
4319628 Two liquid heat exchange system and safety valve to prevent contamination Mar. 16, 1982
4232699 Hydro-mechanical failure detection and latching apparatus Nov. 11, 1980
4184505 Fuel flow rate measuring device Jan. 22, 1980
4078475 Flow regulator Mar. 14, 1978
4071039 Fluid pressure controlled valve assembly Jan. 31, 1978
4027923 Pressure reducer device Jun. 7, 1977
4019525 Tractor protection valve Apr. 26, 1977
3973578 Tandem control valve Aug. 10, 1976
3961640 Dental handpiece control Jun. 8, 1976
3938369 Arrangement for controlling the viscosity of a fluid Feb. 17, 1976











 
 
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