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. 14, 2025
Filed:
Mar. 02, 2023
Naoko Kitaoka, Kanagawa, JP;
Makoto Tanaka, Tokyo, JP;
Naoko Kitaoka, Kanagawa, JP;
Makoto Tanaka, Tokyo, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A liquid discharge head includes a nozzle from which a liquid is to be discharged; a pressure chamber communicating with the nozzle; a substrate defining a side wall the pressure chamber; a diaphragm having a surface on the substrate, the diaphragm defining a part of a wall of the pressure chamber and a part of the nozzle; and a piezoelectric element on another surface of the diaphragm opposite to the surface of the diaphragm on the substrate, the piezoelectric element including: a piezoelectric portion configured to vibrate; and a pair of electrodes sandwiching the piezoelectric portion between the pair of electrodes, and an area of at least one of the pair of electrodes of the piezoelectric element is larger than an area of the pressure chamber in a plane of the diaphragm.