Global Patent Index - EP 1080504 A1

EP 1080504 A1 2001-03-07 - PIEZOELECTRIC ACTUATOR

Title (en)

PIEZOELECTRIC ACTUATOR

Title (de)

PIEZOELEKTRISCHER AKTOR

Title (fr)

ACTIONNEUR PIEZO-ELECTRIQUE

Publication

EP 1080504 A1 (DE)

Application

EP 00914040 A

Priority

  • DE 0000511 W
  • DE 19909482 A

Abstract (en)

[origin: DE19909482A1] The invention relates to a piezoelectric actuator, notably for actuating control valves or injectors of internal combustion engines of motor vehicles. Said actuator comprises a cylindrical piezoelectric actuator body (1) in the shape of a multilayer laminate made of superimposed layers of a piezoelectric material between which metallic or electrically conductive alternating first and second electrode layers (10, 11) are inserted which serve as electrodes. Said first and second electrode layers (10, 11) are alternately contacted by a first and second electrically conductive shared electrode terminal (12, 13). The piezoelectric actuator body (1) either has an internal longitudinal hole (2) and at least the first shared electrode terminal (12) is mounted on the inner wall (3) of the actuator body (1) embodied by the internal longitudinal hole (2) and there contacts the first electrode layer (10) or, alternatively, the actuator body (1) does not have an internal longitudinal hole and the first and second electrode layers (10, 11) are bare on the outer cylinder wall (4) of the actuator body (1) in angle-displaced points where they contact the first and second electrode terminals (12, 13).

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

H01L 41/083

IPC 8 full level (invention and additional information)

H01L 41/047 (2006.01); F02M 51/06 (2006.01); F02M 59/46 (2006.01); H01L 41/083 (2006.01); H02N 2/04 (2006.01)

CPC (invention and additional information)

F02M 51/0603 (2013.01); H01L 41/0471 (2013.01); H01L 41/0833 (2013.01); H01L 41/0835 (2013.01); F02M 51/005 (2013.01); F02M 63/0026 (2013.01)

Citation (search report)

See references of WO 0052770A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19909482 A1 20000907; CN 1183609 C 20050105; CN 1296644 A 20010523; EP 1080504 A1 20010307; JP 2002538629 A 20021112; US 6940213 B1 20050906; WO 0052770 A1 20000908

INPADOC legal status


2010-03-24 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20091001

2009-06-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: H01L 41/047 20060101AFI20090506BHEP

2009-06-10 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: H01L 41/083 20060101ALI20090506BHEP

2009-06-03 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: H01L 41/047 20060101AFI20090429BHEP

2007-11-21 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20071022

2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE FR GB IT

2001-05-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010308

2001-03-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE