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Class Information
Number: 137/601.09
Name: Fluid handling > Systems > Dividing into parallel flow paths with recombining > With common operator > Rotary valve > Axes of rotation parallel > Adjacent plate valves always parallel
Description:










Patents under this class:
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Patent Number Title Of Patent Date Issued
7712312 Pressure balanced swing valve for engine system May. 11, 2010
7458390 Breath controlled air inlet for blower Dec. 2, 2008
7392826 Valve device and multiport regulating assembly comprising a plurality of such devices Jul. 1, 2008
7198062 Fluid control valve Apr. 3, 2007
6817378 Fluid flow control damper assembly Nov. 16, 2004
6557583 Electric power modulated lead screw actuated dampers and methods of modulating their operation May. 6, 2003
6499310 Flow control device for a gas stream Dec. 31, 2002
6418964 Bearing-supported damper assembly Jul. 16, 2002
6293306 Throttle gate valve Sep. 25, 2001
6099405 Damper blade system Aug. 8, 2000
5938524 Damper blade system Aug. 17, 1999
5580307 Shutter for air or smoke conduits Dec. 3, 1996
5425673 Fire closure shutter Jun. 20, 1995
5238453 Integral pivot damper blade Aug. 24, 1993
5141026 Pivoting shutter device for regulating an air flow passing through a heat exchanger Aug. 25, 1992
5103867 Active reed valve Apr. 14, 1992
5007456 Closing arrangement for ducts having large cross-sectional areas, particularly flue gas ducts Apr. 16, 1991
4887641 Modified parallel blade damper for an air handling system Dec. 19, 1989
4823836 Dampers with leaf spring seals Apr. 25, 1989
4610197 Damper blade construction Sep. 9, 1986
4518012 Air damper assembly with movable blades May. 21, 1985
4506829 Variable speed damper means Mar. 26, 1985
4506825 Solenoid operated damper blades Mar. 26, 1985
4493342 Double louver damper Jan. 15, 1985
4487214 Damper blade actuating mechanism Dec. 11, 1984
4442862 Link bar operator for rotating blade dampers Apr. 17, 1984
RE31471 Multiple blade damper assembly Dec. 27, 1983
4404990 Economy, angle-blade damper kit Sep. 20, 1983
4377350 Pivot for damper assembly Mar. 22, 1983
4375183 Insulated shutter assembly Mar. 1, 1983
4372342 Balancing damper with quick set adjustment bracket Feb. 8, 1983
4338967 Universal link bar operator and actuator for rotating blade air, smoke, and fire dampers Jul. 13, 1982
4305427 Damper assembly Dec. 15, 1981
4294283 Wedge sealed damper Oct. 13, 1981
4274439 Control valve having a disc shaped throttle Jun. 23, 1981
4273156 Shutoff device Jun. 16, 1981
4259987 Linear damper system Apr. 7, 1981
4256143 Shut-off damper Mar. 17, 1981
4254795 Airflow control mechanism insertable into an air duct Mar. 10, 1981
4253492 System for controlling the flow of gaseous fluids Mar. 3, 1981
4249571 Air control mechanism having noise suppression means Feb. 10, 1981
4244397 Shut-off damper Jan. 13, 1981
4191212 Multiple blade damper assembly Mar. 4, 1980
4187878 Valve having internally pressurized sealing elements Feb. 12, 1980
RE30204 Control damper Feb. 5, 1980
4185657 Economy, angle-blade damper kit Jan. 29, 1980
4185658 Rotating blade damper Jan. 29, 1980
4184288 Smoke and fire shield damper Jan. 22, 1980
4114646 Rotating blade fire damper Sep. 19, 1978
4113232 Smoke, fire and air control damper with stamped blade Sep. 12, 1978

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