Piezoelectric pump
US4842493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/1609
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.