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:
Oct. 05, 2010
Filed:
Sep. 11, 2008
Minoru Usui, Nagano, JP;
Kazuo Koshino, Nagano, JP;
Hitotoshi Kimura, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid sensing apparatus includes a liquid sensing chamberhaving a liquid inlet port that is in communication with an external liquid container in which a liquid is reserved, and a liquid outlet port that is in communication with a liquid consuming apparatus, a movable membermovable depending on a liquid level in the liquid sensing chamber, a recess portionfor cooperating with a wall surface of the movable memberto form a closed space when the movable memberis moved to a predetermined position depending the liquid level, and a piezoelectric sensing meansfor applying a vibration to the recess portion and sensing a state of a free vibration following upon the vibration.