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Class Information
Number: 251/305
Name: Valves and valve actuation > Rotary valves > Butterfly
Description: Devices wherein the pivot is centrally located in the valve member, providing oppositely directed radial wings.










Sub-classes under this class:

Class Number Class Name Patents
251/308 Head and stem connections 184
251/306 Head and/or seat packing 347


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8671683 Butterfly valve for turbocharger systems Mar. 18, 2014
8662099 Valve shaft apparatus for use with rotary valves Mar. 4, 2014
8662474 Combination bearings having improved load capacities and lifespan and valve assemblies including the same Mar. 4, 2014
8628057 Locking mechanism for valve device Jan. 14, 2014
8616242 Pipe of circular overall cross section, fitted with an airflow rate regulating device Dec. 31, 2013
8561652 Method for safe filling with carbon nanotubes, filling system and industrial plant employing this method Oct. 22, 2013
8540210 Low friction and gradually opening butterfly valve vane Sep. 24, 2013
8517333 Fluid actuated valve with hall position sensor Aug. 27, 2013
8479714 Valve with bypass duct incorporating a heating member and combustion engine intake circuit with preheating of the air Jul. 9, 2013
8480054 Tortionally stiff, thermally isolating shaft coupling with multiple degrees of freedom to accommodate misalignment Jul. 9, 2013
8464688 Throttle body for internal combustion engine Jun. 18, 2013
8464689 Throttle body to intake manifold mounting Jun. 18, 2013
8459895 Power transmission device and assembling method thereof Jun. 11, 2013
8434506 Flow control valve and method for manufacturing the same May. 7, 2013
8430079 Throttle valve Apr. 30, 2013
8430113 Method of manufacturing valve, and valve produced by the method Apr. 30, 2013
8376311 Valve adjustment assembly Feb. 19, 2013
8371328 Back pressure valve with inductively heated flap Feb. 12, 2013
8356795 Shaft retaining assemblies for use with fluid valves Jan. 22, 2013
8356796 Unitary shaft extender apparatus Jan. 22, 2013
8347908 Lightweight titanium aluminide valves and methods for the manufacture thereof Jan. 8, 2013
8342148 Throttle valve for internal combustion engine Jan. 1, 2013
8235025 Throttle apparatus Aug. 7, 2012
8205633 Collets for use with valves Jun. 26, 2012
8201401 Passive valve assembly with negative start angle Jun. 19, 2012
8172201 Exhaust throttling valve using a general purpose actuator May. 8, 2012
8172202 Butterfly valve assembly including a bearing assembly for serrated spline constraint May. 8, 2012
8162288 Composite valve Apr. 24, 2012
8157241 Methods and apparatus for regulating gas turbine engine fluid flow Apr. 17, 2012
8136793 Valve arrangement Mar. 20, 2012
8128057 Methods and apparatus for regulating gas turbine engine fluid flow Mar. 6, 2012
8113230 Simple axial locking of a valve shaft Feb. 14, 2012
8113229 Gear operated shut valve for a ventilation system Feb. 14, 2012
8096524 Seal retainer/line centering clips with multiple flange capability Jan. 17, 2012
8082900 Method for producing a support plate for valve bodies and a support plate Dec. 27, 2011
8069837 Intake control device for internal combustion engine Dec. 6, 2011
8070130 Apparatus to bias valve closure members Dec. 6, 2011
8061684 Anti-twist device for an actuating motor Nov. 22, 2011
RE42940 Air flow rate control apparatus Nov. 22, 2011
8042515 Throttle device Oct. 25, 2011
8028677 Assembly and method for controlling an air intake runner Oct. 4, 2011
8015958 Active intake manifold flap cartridge and method Sep. 13, 2011
8011347 Apparatus and method for pressure relief in an exhaust brake Sep. 6, 2011
7984892 Low friction butterfly ring Jul. 26, 2011
7963501 Butterfly valve Jun. 21, 2011
7963503 Metal seal with flexible insert Jun. 21, 2011
7950623 Valve opening and closing control apparatus May. 31, 2011
7946270 Valve apparatus May. 24, 2011
7913389 Method of making a flapper valve assembly Mar. 29, 2011
7895989 Butterfly-type throttle valve Mar. 1, 2011

1 2 3 4 5 6 7 8 9 10 11










 
 
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