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:
May. 14, 2024
Filed:
Mar. 18, 2021
Kitz Corporation, Chiba, JP;
Yukihiro Miyashita, Nagano, JP;
Chokkaku Yokozawa, Nagano, JP;
KITZ CORPORATION, Tokyo, JP;
Abstract
An eccentric butterfly valve, suitable for high-pressure fluids, in which: even if a dimensional error among components is large, the seat ring is aligned with the disk while sealability between the seat ring and the body is ensured; for either pressure, positive pressure or counter pressure, the seal surface pressure between the disk and the seat ring is ensured to achieve sealability; and a continuous seal portion is ensured between the body and the seat ring, thereby reliably inhibiting fluid leakage, and a method of manufacturing the eccentric butterfly valve. A tapered surfaceformed on a seat ringand a step portionformed on a bodyare opposed to each other. With a corner portionof the step portionon a tapered surfaceside digging into the tapered surfacean annular seal portionis formed on an opposed plane between the bodyand a seat ring