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:
Aug. 23, 2011
Filed:
Jun. 06, 2008
Koichiro Hara, Nagoya, JP;
Koichiro Hara, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Aichi-Ken, JP;
Abstract
A liquid jetting apparatus includes: a cavity unit having a plurality of nozzles and pressure chambers; and an actuator unit applying jetting pressures to the pressure chambers. The actuator unit has a plurality of stacked ceramics layers, individual electrodes corresponding to the pressure chambers, a common electrode common to all the pressure chambers, and a barrier layer preventing the liquid from being penetrated therethrough. The barrier layer is stacked on a position which is between a contact surface, of the actuator unit, making contact with the cavity unit and the individual electrodes closest to the contact surface, except a position on the contact surface. It is possible to prevent the individual electrodes and the common electrode from being electrically short-circuited due to the liquid even when the ceramics layer in contact with the cavity unit has a crack.