Title: Slide gate damper

Abstract: A slide gate damper arrangement which works well in large ducts, which are conveying hot, dust laden gases, and which duct has an obstruction extending down through the middle of it, such as a concentric pipe. The slide gate arrangement comprises a pair of gates which traverse the large duct from opposite sides thereof, seating in the middle of the duct. The leading edges of the two gates have a configuration such that they match and seal around the inner pipe.

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Inventors: Rickard, Earl K. (East Granby, CT, US)

Application Number: 864416
Filing Date: 1977-12-27
Publication_date: 1980-01-08
Assignee: Combustion Engineering, Inc. (Windsor, CT)
Primary Class(es): 137/246.22 137/594, 241/186.2, 251/212
Other Classes:
US Patent Ref:

778591	Dec, 1904	Layne	251/1.
860287	Jul, 1907	Flewwelling	251/1.
1692302	Nov, 1928	Hessemer	251/1.
3547140	Dec, 1970	Hastings et al.	137/240.
4044988	Aug, 1977	Arzumanov et al.	251/1.
4090534	May, 1978	Martin et al.	251/212.

Other Refs:
Primary Examiner: Schwadron, Martin P.
Assistant Examiner: Gerard, Richard
Attorney: Olson; Robert L.