US20040169445A1
Expired / Lapsed
US
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Device with a piezoelectric actuator
Assignee: Aumovio Germany GmbH
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Filing: 2004-03-05
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Granted: —
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Expires: 2024-03-05
Abstract
Abstract A device with a piezoelectric actuator ( 1 ) comprises two faces ( 2, 3 ) and two electroconductive contact paths ( 4, 5 ), each traversing the actuator ( 1 ) starting from at least one face ( 3 ). The actuator is clamped between two metallic plates ( 6, 7 ), each arranged against a face ( 2, 3 ). The piezoelectric actuator further comprises an electroinsulating layer ( 8 ) arranged between each face 92, 3 ) and the corresponding metallic plate ( 6, 7 ).
Inventors
- 👤 Hellmut Freudenberg
- 👤 Wendelin Klugl
- 👤 Marcus Unruh
- 👤 Andreas Voigt
- 👤 Claus Zumstrull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:14
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/88; H10N30/883; F; F02; F02M; F02M2200/00; F02M2200/21
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
56 words
1 . A device comprising a piezoelectric actuator, which a) has two faces and two electroconductive contact paths, each traversing said actuator starting from at least one face; and b) is clamped between two metallic plates, each arranged against a face; wherein an electroinsulating layer is arranged between each face and the plate arranged against it.
Claim 2
Dependent Claim
56 words
1 . A device comprising a piezoelectric actuator, which a) has two faces and two electroconductive contact paths, each traversing said actuator starting from at least one face; and b) is clamped between two metallic plates, each arranged against a face; wherein an electroinsulating layer is arranged between each face and the plate arranged against it.
Claim 3
Dependent Claim
19 words
2 . The device according to claim 1 , wherein the insulating layer is made of a ceramic material.
Claim 4
Dependent Claim
24 words
3 . The device according to claim 2 , wherein the insulating layer is connected in a material actuated manner to the corresponding plate.
Claim 5
Dependent Claim
24 words
4 . The device according to claim 3 , wherein the insulating layer is selected from the group comprising sprayed layers and enameled layers.
Claim 6
Dependent Claim
17 words
5 . The device according to claim 2 , wherein the insulating layer is a separate component.
Claim 7
Dependent Claim
17 words
6 . The device according to claim 1 , wherein the actuator is a ceramic multilayer actuator.
Claim 8
Dependent Claim
20 words
7 . The device according to claim 1 , wherein the actuator is enclosed by lateral insulation between the faces.
Claim 9
Dependent Claim
21 words
8 . The device according to claim 7 , wherein the lateral insulation is at a distance from each insulating layer.
Claim 10
Dependent Claim
22 words
9 . The device according to claim 1 , wherein each contact path is continued by an associated recess in a plate.
Claim 11
Dependent Claim
23 words
10 . The device according to claim 1 , wherein the plates are connected in a force actuated manner via a spring element.
Claim 12
Dependent Claim
21 words
11 . The device according to claim 10 , wherein the spring element is a tube spring, which encloses the actuator.
Claim 13
Dependent Claim
23 words
12 . The device according to claim 1 , which is a component of a fuel injection device for an internal combustion engine.
Claim 14
Dependent Claim
60 words
13 . A device comprising: a piezoelectric actuator having a top and a bottom face and two electroconductive contact paths, each traversing said actuator starting from at least one of said faces; two metallic plates each arranged against said top and bottom face, respectively; and—two electroinsulating layers each arranged between said top or bottom face and the respective metallic plate.
Claim 15
Dependent Claim
60 words
13 . A device comprising: a piezoelectric actuator having a top and a bottom face and two electroconductive contact paths, each traversing said actuator starting from at least one of said faces; two metallic plates each arranged against said top and bottom face, respectively; and—two electroinsulating layers each arranged between said top or bottom face and the respective metallic plate.
Claim 16
Dependent Claim
19 words
14 . The device according to claim 13 , wherein the insulating layers are made of a ceramic material.
Claim 17
Dependent Claim
24 words
15 . The device according to claim 14 , wherein the insulating layers are connected in a material actuated manner to the corresponding plate.
Claim 18
Dependent Claim
24 words
16 . The device according to claim 15 , wherein the insulating layer is selected from the group comprising sprayed layers and enameled layers.
Claim 19
Dependent Claim
22 words
17 . The device according to claim 13 , wherein each contact path is continued by an associated recess in a plate.
Claim 20
Dependent Claim
23 words
18 . The device according to claim 13 , wherein the plates are connected in a force actuated manner via a spring element.
Claim 21
Dependent Claim
21 words
19 . The device according to claim 18 , wherein the spring element is a tube spring, which encloses the actuator.
Claim 22
Dependent Claim
23 words
20 . The device according to claim 13 , which is a component of a fuel injection device for an internal combustion engine.
References Cited (Backward Citations)
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