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:
Nov. 23, 2021
Filed:
Jan. 08, 2021
Ckd Corporation, Komaki, JP;
Yasunori Nishimura, Komaki, JP;
CKD CORPORATION, Komaki, JP;
Abstract
In a non-sealed butterfly valve, a butterfly valve element includes a downstream end face that faces a downstream side of a flow passage during valve closing and a maximum outer diameter portion that makes a gap with a minimum distance. The butterfly valve element includes a first chamfered portion that reduces the diameter of the butterfly valve element from the maximum outer diameter portion to the downstream end face over the entire circumference. The first chamfered portion has a taper angle of 5° or less relative to the thickness direction of the butterfly valve element. The first chamfered portion and the downstream end face intersect each other at a ridge line that falls within an imaginary circle that is centered on the central axis of the butterfly valve element and passes the maximum outer diameter portion.