BUTTERFLY VALVE
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Jan 19, 2023
filing date -
Jan 19, 2023
priority date (Note) -
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status (Latency Note)
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Abstract
Proposed is a butterfly valve for minimizing leak of exhaust gas from an exhaust pipe even under high back pressure. The butterfly valve may include a valve plate provided in the exhaust pipe, a valve shaft crossing the exhaust pipe and holding the valve plate, and a bearing unit slidably supporting the valve shaft and including an annular sealing bush and an annular support bush into which the valve shaft 120 is inserted. The valve may also include a housing attached to the exhaust pipe and accommodating the bearing unit. The support bush is arranged between the housing and the sealing bush and contacts the housing on an outer peripheral surface of the support bush. The sealing bush contacts the housing on an outer peripheral surface of the sealing bush and contacts a flange of the valve shaft on a valve shaft opposing surface of the sealing bush.
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