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Class Information
Number: 137/601.11
Name: Fluid handling > Systems > Dividing into parallel flow paths with recombining > With common operator > Rotary valve > Axes of rotation parallel > Adjacent plate valves counter rotate

Patents under this class:

Patent Number Title Of Patent Date Issued
8684033 Two-shutter valve Apr. 1, 2014
8196604 Deployable automated vent cover device Jun. 12, 2012
7814748 Exhaust bypass valve remote linkage Oct. 19, 2010
7712312 Pressure balanced swing valve for engine system May. 11, 2010
7089958 Damper vane Aug. 15, 2006
7011292 Bi-leaved valve apparatus Mar. 14, 2006
6568417 Throttle valve assembly May. 27, 2003
6564819 Fluid flow control damper assembly May. 20, 2003
6557826 Low leakage butterfly damper May. 6, 2003
6499310 Flow control device for a gas stream Dec. 31, 2002
6418964 Bearing-supported damper assembly Jul. 16, 2002
5944506 Burner assembly with tight shut-off opposed louver air damper Aug. 31, 1999
5842919 Damper actuator assembly Dec. 1, 1998
5765592 Valve Jun. 16, 1998
5007456 Closing arrangement for ducts having large cross-sectional areas, particularly flue gas ducts Apr. 16, 1991
4844120 Motorized control damper Jul. 4, 1989
4658857 Control valve with split disc Apr. 21, 1987
4541328 Damper seal apparatus Sep. 17, 1985
4506828 Reversible damper means Mar. 26, 1985
RE31471 Multiple blade damper assembly Dec. 27, 1983
4304248 Damper blade operating mechanism Dec. 8, 1981
4275762 Control damper Jun. 30, 1981
4241647 Air damper valve Dec. 30, 1980
4207864 Damper Jun. 17, 1980
4191212 Multiple blade damper assembly Mar. 4, 1980
4076035 Valve construction Feb. 28, 1978

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