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. 27, 2002
Filed:
Jan. 17, 2002
Denso Corporation, Kariya, JP;
Abstract
An effective range of urging force of an assist spring is between a maximum retarded phase and a predetermined phase of a camshaft, a vane rotor and vanes. The predetermined phase is equal to an intermediate locking phase of the camshaft, the rotor and the vanes+10 degree CA. Even when oil pressure supplied to each advancing chamber is reduced at the time of engine stop, the camshaft, the rotor and the vanes can be advanced to or beyond the intermediate phase by the spring. Furthermore, at the time of engine start, the rotor and the vanes are positioned near the intermediate phase, so that reaction force of the spring is very small, allowing easy movement of the rotor with drive torque of the camshaft toward a retard side. Thus, the rotor can be locked at the intermediate phase by a lock pin.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile