Cryo-rotary joint
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United States of America Patent
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-
Dec 31, 2013
Grant Date -
May 31, 2012
app pub date -
Jun 2, 2010
filing date -
Jun 2, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A joint includes a housing and a refrigerant tube connected to a refrigerant source and communicated with a target part in a rotating machine. A rotating member is loosely fitted inside with the refrigerant tube and fixed to a rotary part of the rotating machine. A relatively rotating member has a fixed-side member and rotating-side member. The fixed-side member is connected to the refrigerant tube via a refrigerant tube extension section. The rotating-side member is connected to the rotating member via a rotating member extension section. A refrigerant zone is formed by spaces defined between the refrigerant tube and the rotating member, and between the refrigerant tube and rotating member extension sections. A sealing member is installed between the fixed-side and rotating-side members. A vacuum chamber and pressure chamber are defined within the housing.
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