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. 18, 2011
Filed:
Dec. 17, 2007
Yasunori Ono, Gunma-ken, JP;
Keiichi Kai, Gunma-ken, JP;
Kenichi Fujiki, Gunma-ken, JP;
Kosuke Yamane, Gunma-ken, JP;
Yasunori Ono, Gunma-ken, JP;
Keiichi Kai, Gunma-ken, JP;
Kenichi Fujiki, Gunma-ken, JP;
Kosuke Yamane, Gunma-ken, JP;
Yamada Manufacturing Co., Ltd., Kiryu-shi, Gunma-ken, JP;
Abstract
A device including a first discharge passage from a first rotor assembly to an engine, a first return passage that returns to an intake side of the first rotor assembly, a second discharge passage from a second rotor assembly to the engine, a second return passage that returns to an intake side of the second rotor assembly, and a pressure control valve whose valve main body is provided between a discharge port from the second rotor assembly and the first discharge passage. The first discharge passage and the second discharge passage are coupled, and a flow passage control is executed in each of: a low revolution range; an intermediate revolution range; and a high revolution range.