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:
Mar. 21, 2023
Filed:
Jun. 11, 2021
Denso Corporation, Kariya, JP;
Naohito Seko, Kariya, JP;
Yoshiaki Yamamoto, Kariya, JP;
Shinichi Yokoyama, Kariya, JP;
Yuuji Nakano, Kariya, JP;
Ryo Sano, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening Φis smaller than a diameter of the valve opening Φ. A curvature radius of the ball face Ris smaller than or equal to a curvature radius of the seat face is R