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. 26, 2019
Filed:
Dec. 01, 2017
Roland Dg Corporation, Hamamatsu-shi, Shizuoka, JP;
Hidetoshi Atsumi, Hamamatsu, JP;
ROLAND DG CORPORATION, Shizuoka, JP;
Abstract
A diaphragm pump includes an inflow chamber and an outflow chamber. The inflow chamber is provided with an inflow valve seat. An inflow valve that prevents backflow of a liquid is disposed against the inflow valve seat. The outflow chamber is provided with an outflow valve seat. An outflow valve that prevents backflow of a liquid is disposed against the outflow valve seat. The diaphragm pump also includes an inflow-valve presser that presses the inflow valve against the inflow valve seat, and an outflow-valve presser that presses the outflow valve against the outflow valve seat. Each of the inflow valve and the outflow valve is defined by an elastically deformable member. Each of the inflow valve seat and the outflow valve seat includes a surface at least a portion of which is a curved surface.