Flue control device

Stoves and furnaces – Dampers – Stovepipe

Patent

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Details

126307A, 138 37, 138 39, F23L 300

Patent

active

RE0326712

ABSTRACT:
A flue control device for slowing the rate at which heated exhaust gases rise through an exhaust stack comprises a cylindrical housing enclosed by end caps, with an offset inlet and outlet being positioned in opposite end caps. The interior of the housing defines a baffle chamber, and a baffle mechanism is positioned in the baffle chamber between the inlet and outlet. The baffle mechanism comprises two overlapping plates, each plate having a prominent flange extending in an upstream direction relative to the flow of gases through the baffle chamber. The flanges interrupt and slow the swirling circular flow of gases as they pass through the baffle chamber. The baffle and housing are of a size such that the cross-sectional area of the restricted portion of the housing adjacent the baffle is at least as large as the cross-sectional area of the exhaust stack. Thus, the flue control device changes the direction of the gases and disrupts laminar or smooth flow of the gases to slow the flow of exhaust gases through the exhaust stack, without necessarily restricting such flow.

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