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:
Jul. 07, 2015
Filed:
Dec. 26, 2012
Seiko Epson Corporation, Tokyo, JP;
Hiroki Miyajima, Matsumoto, JP;
Koji Morikoshi, Shiojiri, JP;
Seiko Epson Corporation, , JP;
Abstract
A pressure chamber in which an opening of a groove-shaped flow paths configuring a portion of a liquid flow path is formed by sealing with a film, a valve body which opens and closes a communication path communicating with the pressure chamber, and a pressure receiving member which is pressed by the film displaced to the pressure chamber side by negative pressure of the pressure chamber and is able to press the valve body in a direction where the valve body is valve opening state are included, and the valve body includes a flange section, a shaft section connected to the flange section and a seal member, and the seal member is formed in a shape of an annulus surrounding the shaft section.