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Class Information
Number: 137/877
Name: Fluid handling > Systems > With flow control means for branched passages > Biased valve
Description: System in which at least one of the flow passages is provided with a fluent material flow control means which is urged by a spring, gravity, or fluid pressure means either toward or away from its seat.










Sub-classes under this class:

Class Number Class Name Patents
137/878 Spring bias 30


Patents under this class:

Patent Number Title Of Patent Date Issued
7610936 Flow based pressure isolation mechanism for a fluid delivery system Nov. 3, 2009
7252117 Reusable stub-out cover Aug. 7, 2007
6766829 Valve assembly for gas cylinder Jul. 27, 2004
6341624 Valve for cryogenic fluid Jan. 29, 2002
5640997 Relief valve for gas flow rate regulator Jun. 24, 1997
5365975 Constant air pressure unit for air handling system Nov. 22, 1994
4998562 Flow control valve Mar. 12, 1991
4913260 Gas silencing system with controlling sound attenuation Apr. 3, 1990
4749005 Combined gas pressure regulator and shut off valve Jun. 7, 1988
4744391 Flow control valve May. 17, 1988
4700748 Pressure-referenced programmed flow control in a hydraulic valve Oct. 20, 1987
4692253 Method and apparatus for removing extraneous matters Sep. 8, 1987
4690171 Valve assembly for a sphygmomanometer Sep. 1, 1987
4664155 Apparatus for centralized pressurization and depressurization of aircraft hydraulic reservoirs May. 12, 1987
4585623 Device for performing quantitative chemical and immunochemical assays Apr. 29, 1986
4516594 Multi-part valve with a valve seat skeleton and cast valve body May. 14, 1985
4489757 Electrically actuated servocontrol system for a static pressure operated load Dec. 25, 1984
4391321 Heat exchanger in plants for ventilating rooms or buildings Jul. 5, 1983
4353243 Flexible diaphragm controlled valve Oct. 12, 1982
4272021 Pipeline drain apparatus Jun. 9, 1981
4195777 Hot water heating system Apr. 1, 1980
4172471 Valve unit Oct. 30, 1979
4134428 Non-drip valve Jan. 16, 1979
4100940 Trickle emitter for subterranean irrigation Jul. 18, 1978
4073312 Charge and relief valve Feb. 14, 1978
4011662 Automatic valve assembly and heater/humidifier converter for clothes dryer Mar. 15, 1977











 
 
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