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:
Apr. 09, 2019
Filed:
Apr. 07, 2016
Welco Co., Ltd., Tokyo, JP;
Yoji Minatodani, Fujisawa, JP;
WELCO CO., LTD, Tokyo, JP;
Abstract
To provide a pump whose elastic member has long life, a pump according to an embodiment of the invention comprises an inner wall surface having a cylindrical shape, an elastic ring disposed along the inner wall surface and forming an operation chamber extending in a circumferential direction of the elastic ring with respect to the inner wall surface, and a plurality of pressing members pressing a part of the elastic ring in the circumferential direction against the inner wall surface and thereby forming a blocking part in the operation chamber, wherein the plurality of pressing members cause fluid in the operation chamber to move by rotating along the inner wall surface and thereby moving the blocking part, and the elastic ring is disposed to maintain a circumference in a natural state of the elastic ring.