Rotation table device
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United States of America Patent
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Dec 27, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 25, 2015
filing date -
Feb 26, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A rotation table device includes a casing, a rotation member, a braking member, a brake disk, and a target braking member, and a pressure adjustment unit that maintains the pressure inside the casing so as to be higher than the atmospheric pressure by air supplied from a purge air supply port, wherein the braking member includes a communication portion formed as a groove or a hole causing an inner space of a contact surface of the brake disk to communicate with an outer space thereof.
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