| 摘要 |
<p>This invention is an adjustable fume damper.</p><p><Paragraphs id="pa02" num="0002" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">The mechanism of this invention is divided in two functions. The first one is the automatic opening and closing of the damper, which is adjusted to the opening and the closing of the fireplace door. The second one is the adjustment of the damper tendency during the burning if the fuel with the fireplace door closed.</p><p><Paragraphs id="pa03" num="0003" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">The damper tendency of this invention ranges in an operating range of 90 degrees and its positions are the open position, the closed position and the intermediate ones.</p><p><Paragraphs id="pa04" num="0004" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">The place of the damper of this invention can be seen from the indication on the upper part of the door canvas.</p><p><Paragraphs id="pa05" num="0005" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">The rotation of the screw of this invention leads to the linear vertical movement of the nut. As a result, the quadrature axis transmits motion through the cross-traffic link to the stopper link and thus through the rotating shaft to the dumper.</p><p><Paragraphs id="pa06" num="0006" xmlns:base="http://www.sipo.gov.cn/XMLSchema/base">This invention can be used to any kind of fireplaces.
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