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:
Oct. 27, 2015
Filed:
Jan. 10, 2012
Ryuichiro Yonemoto, Shizuoka, JP;
Eisuke Kato, Shizuoka, JP;
Masayuki Urashin, Shizuoka, JP;
Shinichiro Yamada, Yaizu, JP;
Ryuichiro Yonemoto, Shizuoka, JP;
Eisuke Kato, Shizuoka, JP;
Masayuki Urashin, Shizuoka, JP;
Shinichiro Yamada, Yaizu, JP;
Hitachi Appliances, Inc., Tokyo, JP;
Abstract
A screw compressor includes a valve hole formed at a discharge side end surface of a discharge casing and at a position opening to a compression work chamber; a bypass flow path having the valve hole and a discharge chamber communicate with each other; and a valve body arranged in the valve hole. The screw compressor also includes cylinder chambers provided on a rear surface side of the valve body; a piston reciprocally moving in the cylinder chambers; a rod connecting the piston and the valve body; communication paths for introducing a fluid on a discharge side into the cylinder chamber on a side opposite to a valve body side of the piston and on the valve body side; a pressure discharge path; a plurality of valve means; and a controller controlling the plurality of valves means.