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:
Aug. 23, 2005
Filed:
Sep. 26, 2003
Masahiko Soshino, Hitachiohta, JP;
Takehiko Kowatari, Kashiwa, JP;
Yuzo Kadomukai, Ishioka, JP;
Yuki Ejiri, Hitachinaka, JP;
Kenji Ono, Mito, JP;
Yasuhiro Kamimura, Hitachinaka, JP;
Norihiro Isozaki, Hitachinaka, JP;
Eisuke Wayama, Hitachinaka, JP;
Hitoshi Andoh, Hitachinaka, JP;
Yutaka Takeuchi, Hitachinaka, JP;
Masahiko Soshino, Hitachiohta, JP;
Takehiko Kowatari, Kashiwa, JP;
Yuzo Kadomukai, Ishioka, JP;
Yuki Ejiri, Hitachinaka, JP;
Kenji Ono, Mito, JP;
Yasuhiro Kamimura, Hitachinaka, JP;
Norihiro Isozaki, Hitachinaka, JP;
Eisuke Wayama, Hitachinaka, JP;
Hitoshi Andoh, Hitachinaka, JP;
Yutaka Takeuchi, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention is intended to simplify a default mechanism of a throttle valve opening and closing device for the purpose of improving mountability of the device to a vehicle. When a motor generate no driving forces, a throttle valve is held in a position () by a return spring. In this position, gaps are formed between the throttle valve and a wall surface of an intake passage. Spherical recesses are formed in parts of the wall surface of the intake passage. In a position () where the throttle valve is opposed to the spherical recesses, the gaps are minimized in an operating range of the throttle valve.