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Class Information
Number: 137/500
Name: Fluid handling > Line condition change responsive valves > With separate connected fluid reactor surface > Responsive to change in rate of fluid flow > Expansible chamber subject to differential pressures
Description: Apparatus in which the valve is operated by a movable reaction member such as a piston or diaphragm working in an expansible chamber under the influence of two pressures taken at spaced points in the flow line which vary as a function of the rate of fluid flow through the line.










Sub-classes under this class:

Class Number Class Name Patents
137/501 Pressures across fixed choke 177
137/503 Pressures across flow line valve 83
137/502 With venturi tube having a connection to throat 8


Patents under this class:

Patent Number Title Of Patent Date Issued
7921867 Elbow plug external sleeve valve Apr. 12, 2011
7506662 One-way fluid valve Mar. 24, 2009
7128086 Flow control valves Oct. 31, 2006
7066200 Insert for dynamic flow control Jun. 27, 2006
6354319 Low differential, pilot operated fluid pressure regulation apparatus and method Mar. 12, 2002
6182688 Autonomous device for limiting the rate of flow of a fluid through a pipe, and fuel circuit for an aircraft comprising such a device Feb. 6, 2001
6179020 Fluid level controlled automatic shutoff valve Jan. 30, 2001
5983926 Flow control valve Nov. 16, 1999
5842502 System for controlling flow through a process region Dec. 1, 1998
5797418 Differential pressure detector with reduced reaction forces Aug. 25, 1998
5678602 Gas control and dispensing assembly and gas storage device equipped with such an assembly Oct. 21, 1997
5642752 Controllable constant flow regulating lift valve Jul. 1, 1997
5282490 Flow metering injection controller Feb. 1, 1994
5220940 Flow control valve with venturi Jun. 22, 1993
4821625 Valve device for controlling the delivery of pressurized liquid to two separate hydrostatic motors Apr. 18, 1989
4570667 Demand responsive flow regulator valve Feb. 18, 1986
4549566 Flow volume control device for power steering system Oct. 29, 1985
4545403 Flow regulating device Oct. 8, 1985
4435151 Fuel supply control system Mar. 6, 1984
4336904 Delivery stabilizer for ventilation shaft Jun. 29, 1982
4251027 Variable volume control assembly Feb. 17, 1981
3978883 Device for regulating the combustion air of a furnace, especially with oil- or gasburner and blower for heating installations Sep. 7, 1976
3940928 Air diverter valve Mar. 2, 1976











 
 
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