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:
Jan. 18, 2022
Filed:
Nov. 14, 2019
Okenseiko Co., Ltd., Tokyo, JP;
Akira Inoue, Tokyo, JP;
Kazuki Itahara, Tokyo, JP;
OKENSEIKO CO., LTD., Tokyo, JP;
Abstract
A diaphragm pump includes a suction valve configured to open and close a suction passage to a pump chamber. The suction valve is made of an elastic material and includes a shaft and a valve element. The upper end portion of the shaft includes a projection. A diaphragm holder includes a shaft hole in which the lower end portion of the shaft is inserted, and a seat surface to which part of the suction passage opens. A diaphragm housing presses the upper end portion of the shaft toward the lower end portion and holds the shaft together with the diaphragm holder. The valve element thus comes into tight contact with the seat surface.