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:
Feb. 18, 2003
Filed:
Apr. 03, 2002
Tamotsu Todo, Kanagawa, JP;
Unisia Jecs Corporation, Atsugi, JP;
Abstract
A valve timing control system of an internal combustion engine has: a drive force conveyer; a cam shaft; a housing rotating integrally with one of the drive force conveyer and the cam shaft; a vane rotor housed in the housing, the vane rotor rotating integrally with the other of the drive force conveyer and the cam shaft; an advanced angle chamber and a retarded angle chamber housed in the housing, and turning the vane rotor with an oil pressure; an oil pressure supply-drain measure; a lock gear; and an unlock gear. A large diameter section of a lock pin and an inner periphery of a pin hole define a first clearance while a small diameter section of the lock pin and the inner periphery of the pin hole define a second clearance, such that the first clearance is larger than the second clearance.