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:
Jun. 23, 2026
Filed:
Aug. 25, 2023
Aisin Corporation, Kariya, JP;
Yoshiaki Yamakawa, Kariya, JP;
Shoichi Yoshino, Kariya, JP;
Atsushi Nishigaki, Kariya, JP;
Kenji Ikeda, Kariya, JP;
Yuki Nishida, Kariya, JP;
AISIN CORPORATION, Kariya, JP;
Abstract
A valve open and close period control device includes: a driving-side rotor that rotates synchronously with a crankshaft of an internal combustion engine; a driven-side rotor that rotates integrally with a camshaft of the engine; and a phase adjustment mechanism that sets a relative rotation phase between the driving-side rotor and the driven-side rotor. The driven-side rotor has a support wall portion connected to an end portion of the camshaft, and the support wall portion has an oil supply passage through which lubricating oil can be supplied from an outside to an inside of the driven-side rotor. The device has an oil reservoir structure that reduces a discharge amount of the lubricating oil discharged from an inside of the driving-side rotor, as compared to a supply amount of the lubricating oil supplied from the oil supply passage to the inside of the driven-side rotor when the driving-side rotor is rotating.