VALVE MECHANISM AND ENGINE GAS-EXHAUSTION DEVICE PROVIDED WITH VALVE MECHANISM
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United States of America Patent
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Issued Date -
Apr 16, 2020
app pub date -
Jan 8, 2016
filing date -
Jan 8, 2016
priority date (Note) -
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Abstract
A valve mechanism includes a valve (a butterfly valve 30) arranged in a path in which gas flows, a drive shaft (32) coupled to the valve, and a lever member (33) attached to a lever attachment portion (321) provided at the drive shaft. The lever attachment portion of the drive shaft has a non-circular cross-sectional shape. The lever member has a through-hole (331) in a shape corresponding to a non-circular cross section of the lever attachment portion, and is fitted onto the lever attachment portion. The lever member is fixed to the drive shaft in such a manner that a first contact portion (a first contact member 34) and a second contact portion (323) sandwich the lever member in an axial direction of the drive shaft.
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