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:
May. 29, 2012
Filed:
Jul. 22, 2009
Hideya Yokouchi, Okaya, JP;
Hideya Yokouchi, Okaya, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid supply device includes a liquid supply passage which supplies a liquid from an upstream side where it is supplied from a liquid supply source to a downstream side where it is consumed. A passage forming member has a shape in which the liquid supply passage is formed. A flexible diaphragm forming member has a diaphragm forming part of a wall surface of a pump chamber in the liquid supply passage and is displaceable to change the volume of the pump chamber. A lamination structure is formed by laminating the diaphragm forming member and the passage forming member to form the pump chamber between facing surfaces thereof. A portion corresponding to the outer circumference of the diaphragm forming member has an outer circumference sealing portion preventing liquid, which has leaked from the liquid supply passage to a space between the facing surfaces, from flowing outside the lamination structure.