Rotary joint
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United States of America Patent
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May 19, 2020
Grant Date -
Mar 1, 2018
app pub date -
Jul 21, 2017
filing date -
Aug 24, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A rotary joint includes a tubular case body, an outer cylinder body provided to be relatively rotatable inside the case body, an inner shaft body provided to be relatively rotatable inside the outer cylinder body, a first mechanical seal for forming flow passages that connect a first flow passage of the case body and a second flow passage of the outer cylinder body to each other by dividing a first annular space formed between the case body and the outer cylinder body, and a second mechanical seal for forming flow passages that connect a third flow passage of the outer cylinder body and a fourth flow passage of the inner shaft body to each other by dividing a second annular space formed between the outer cylinder body and the inner shaft body.
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