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:
Jun. 27, 1989
Filed:
Nov. 16, 1987
Kenth Nilsson, Akersberga, SE;
Qenico AB, , SE;
Abstract
In order to significantly intensify the pump action in a piezoelectric pump without long-term, negative consequences, and in order to be able to employ a great variety of fluids, the pump of the invention is formed of piezoceramic parts arranged essentially parallel to and at a distance from one another. They are provided with electrical contacts at both sides, and are covered at both sides with closure means. The cavity between the piezoceramic parts and the closure means forms the pump channel. The electrical contacts lie essentially perpendicular relative to the closure means. The polarization direction in the piezoceramic parts lies parallel to the electrical field strength. A multi-channel pump, particularly for an ink-jet matrix printer means, can be manufactured in an especially simple way by use of known semiconductor manufacturing techniques.