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:
Jan. 27, 1998
Filed:
Jan. 26, 1996
Hidenori Ozawa, Wako, JP;
Kazuhiro Tsuda, Wako, JP;
Isao Hirokawa, Kitsuregawa-machi, JP;
Katsunori Muramatsu, Kitsuregawa-machi, JP;
Ryoichi Matsushima, Kitsuregawa-machi, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Yutaka Giken Co., Ltd., Shizuoka, JP;
Abstract
An exhaust system in an internal combustion engine includes a flow rate regulating valve which is positioned in an intermediate portion of an exhaust gas flow passage. The flow rate regulating valve has a rotary shaft rotatably supported in a valve housing, and a rotationally biasing spring mounted between the rotary shaft and the valve housing which provides a spring force to rotationally bias the rotary shaft. In the exhaust system, an axially biasing spring is mounted separately from the rotationally biasing spring between the valve housing and the rotary shaft for biasing the rotary shaft in an axial direction. The rotary shaft is provided with an abutment surface which faces in the one axial direction, and the valve housing is provided with a limiting portion which abuts against the abutment surface to limit the axial movement of the rotary shaft. Thus, the rotary shaft is biased in the one axial direction by the axially biasing spring, and the abutment surface of the rotary shaft is urged against the limiting portion of the valve housing, thereby avoiding the axially chattering of the rotary shaft.