Mechanism for moving circular plate-shaped member
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United States of America Patent
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Oct 4, 2016
Issued Date -
N/A
app pub date -
Sep 29, 2010
filing date -
Jul 28, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A butterfly valve has a circular plate-shaped valve element, a pair of support shafts, a pair of support shaft moving units, and a drive shaft. The valve element is seated on and removed from the valve seat from below. The drive shaft drives and rotates the support shafts. As the support shafts are rotated by the drive shaft, the valve element is rotated and inverted. The support shaft moving units include decentered shafts that are rotatably supported by casings and in which the support shafts are respectively inserted in a decentered state, and air cylinders configured to apply a force to the support shafts in the upward and downward direction. When the valve element is seated on or removed from the valve seat, the valve element is moved in the upward and downward direction in a horizontal posture as the air cylinders operate.
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