Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Reexamination Certificate
2008-04-15
2009-08-11
Davis, Mary A (Department: 3748)
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
C418S023000, C418S024000, C418S011000
Reexamination Certificate
active
07572116
ABSTRACT:
An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane.
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Hara Masayuki
Hashimoto Akira
Nishikawa Takahiro
Ogasawara Hirotsugu
Sawabe Hiroyuki
Davis Mary A
Kratz Quintos & Hanson, LLP
Sanyo Electric Co,. Ltd.
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