Global Patent Index - EP 1097484 A1

EP 1097484 A1 2001-05-09 - PIEZOELECTRIC ELECTRO-MOTIONAL DEVICES

Title (en)

PIEZOELECTRIC ELECTRO-MOTIONAL DEVICES

Title (de)

PIEZOELEKTRISCHE ELEKTROBEWEGLICHE BAUELEMENTE

Title (fr)

DISPOSITIFS PIEZO-ELECTRIQUES ELECTROMOTEURS

Publication

EP 1097484 A1 (EN)

Application

EP 98937730 A

Priority

IB 9801321 W

Abstract (en)

[origin: WO9965088A1] The present invention is directed to electro-motional devices, especially piezoelectric pumps (50). More specifically, the present invention is directed to the method of fabrication of piezoelectric bender-elements; specifically, using multilayers of piezoelectric material by bonding the layers in a press and heating the layers to form a bender element with a mechanical bias or curve. A piezoelectric unit cell (40) of the present invention is fabricated using two mechanically biased bender-elements, each mechanically and electrically biased in opposite direction. Any number of piezoelectric unit cells of the present invention may be employed in making an electromotional device. A drive circuit of the present invention provides the electrical source to sequentially in an alternating mode activate the unit cells.

IPC 1-7 (main, further and additional classification)

H01L 41/08

IPC 8 full level (invention and additional information)

F04B 43/04 (2006.01); H01L 41/09 (2006.01)

CPC (invention and additional information)

F04B 43/046 (2013.01); H01L 41/042 (2013.01); H01L 41/0926 (2013.01); H01L 41/33 (2013.01)

Designated contracting state (EPC)

CH DE FR GB IT LI SE

EPO simple patent family

WO 9965088 A1 19991216; AU 8642998 A 19991230; EP 1097484 A1 20010509; EP 1097484 A4 20041201; JP 2002518620 A 20020625

INPADOC legal status


2006-09-27 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060404

2004-12-01 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20041013

2001-05-09 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010306

2001-05-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): CH DE FR GB IT LI SE