Valves and valve actuation – Mechanical movement actuator – Gear
Reexamination Certificate
2004-04-30
2008-08-19
Hepperle, Stephen M. (Department: 3753)
Valves and valve actuation
Mechanical movement actuator
Gear
C251S326000, C454S334000, C074S422000
Reexamination Certificate
active
07413163
ABSTRACT:
This invention discloses improvements to a damper of the type used in industrial applications to open and close ducts carrying noxious or corrosive materials, such as combustion by-products. The improvements include a linear rack and wheeled pinion system to raise and lower a damper blade plate and improvements to the seal cartridge to prolong the life of the seal membrane and to prevent galling between the blade plate and the seal cartridge or damper frame.
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Maxwell Ronald K.
McGrath David F.
Perkins Gregory Allyn
Greenberg & Traurig, LLP
Hepperle Stephen M.
Rost Andrew J
Senior Investments AG
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