The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2003
Filed:
Oct. 03, 1997
Isamu Tsubono, Ibaraki-ken, JP;
Masahiro Takebayashi, Tsuchiura, JP;
Isao Hayase, Tsuchiura, JP;
Koichi Inaba, Tochigi-ken, JP;
Koichi Sekiguchi, Tochigi-ken, JP;
Kenichi Oshima, Tochigi-ken, JP;
Atsushi Shimada, Tochigi, JP;
Takehiro Akizawa, Kanuma, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
There is provided a scroll compressor having high overall efficiency and reliability in a wide pressure operating range. A backside excess-suction-pressure region is provided such that pressure higher than suction pressure by a constant value is applied to a backside of scroll members to produce an attractive force to attract both scroll members. A control bypass is also provided for communicating compression chambers with a discharge system only when pressure in the compression chambers is high.