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. 11, 2000
Filed:
Aug. 08, 1997
Kazutoshi Iwasaki, Nagoya, JP;
Yoshio Matsumoto, Inabe-gun, JP;
Denso Corporation, , JP;
Abstract
In a rotational phase adjusting apparatus used for adjusting opening/closing timings of an intake valve or an exhaust valve of an internal combustion engine, a shoe housing driven by a driving shaft has a circumferential wall and a front plate which are integrally formed by aluminum die-casting. Each shoe has a distortion-absorbing hole, and a fan-shaped chamber for accommodating a vane for driving a driven shaft is formed between adjacent two of the shoes. The outer circumferential wall of each shoe has a recess which has an arch shape in section and extends in an axial direction. A clamp seat is formed on a front plate side. When the clamp seat is pressed by a draw claw, a portion of each shoe on the outer circumferential side of the distortion-absorbing hole is resiliently deformed, but a portion of each shoe on the inner circumferential side of the distortion-absorbing hole is deformed less. Thus, this improves the machining accuracy of working surfaces of the shoe housing which affects on sealability and sliding wear between component parts.