Rotary expansible chamber devices – Multistage – Sliding abutment
Reexamination Certificate
2008-02-08
2009-11-03
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Multistage
Sliding abutment
C418S060000, C418S249000, C418S270000
Reexamination Certificate
active
07611343
ABSTRACT:
An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.
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Matsumori Hiroyuki
Matsumoto Kenzo
Saito Takayasu
Sato Takashi
Kratz Quintos & Hanson, LLP
Sanyo Electric Co,. Ltd.
Trieu Theresa
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