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:
Dec. 27, 2016
Filed:
Feb. 22, 2011
Hideki Kojima, Matsumoto, JP;
Hideki Kojima, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid injection device includes: a chamber to which the liquid to be injected is supplied and the injection nozzle is connected; a pump that pumps the liquid into the chamber; a volume varying unit that varies the volume of the chamber by being deformed according to a drive voltage applied thereto; and a drive voltage applying unit that applies the drive voltage having a predetermined voltage waveform to the volume varying unit in a state in which the liquid is supplied to the chamber, wherein the pump is a unit that pumps the liquid to the chamber in a state involving the pressure variations, and the drive voltage applying unit is a unit that applies the drive voltage to the volume varying unit while compensating the influence applied by the pressure variations of the pumped to the chamber on injection by varying the voltage waveform of the drive voltage.