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. 25, 2020
Filed:
Nov. 13, 2018
Omron Healthcare Co., Ltd., Muko-shi, Kyoto, JP;
Yoshihiko Sano, Kyoto, JP;
Ryoichi Fukui, Kyoto, JP;
OMRON HEALTHCARE CO., LTD., Kyoto, JP;
Abstract
A flow rate control valve includes a bobbin and a plunger. On an inner circumferential surface of the bobbin, multiple protruding regions that extend in a direction parallel in an axial direction to the plunger, and a plurality of recessed grooves that form flow paths for a fluid when valve is open are provided side by side alternatingly in a circumferential direction. The multiple recessed grooves include a first recessed groove, second recessed groove, and third recessed groove that are arranged side by side sequentially in the circumferential direction. An interval in the circumferential direction between the first recessed groove and second recessed groove and an interval in the circumferential direction between the second recessed groove and third recessed groove are the same. Surfaces of the multiple protruding regions formed on the inner circumferential surface of the bobbin can be arranged at positions closer to those of one perfect circle.