(under subclass 361) Subject matter wherein the air permitting or preventing inner body is an air engaging and controlling plate which may be swung about a fixed axis region which is parallel to or within the plane of the plate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5, for pivoted chimney or stacktop cap closures.
30, for a pivoted outlet air current regulator used in a
chimney or stacktop.
325+, for pivoted blades used as an internal damper in an inlet airway having a specific air distributor.
327, for an internal valve which pivots in an upstream direction included in an inlet airway having a specific air distributor.
335+, for other pivoted damper panels used in an inlet airway
