US7859169B2
Active / In Force
US
⏱️ 2.2 years remaining
Spring element for pretensioning a piezoelectric actuator and piezoelectric actuator with the spring element
Assignee: TDK Electronics AG
•
Filing: 2009-01-28
•
Granted: 2010-12-28
•
Expires: 2029-01-28
Abstract
Abstract A spring element for pretensioning a piezoelectric actuator is specified, wherein the spring element has a tubular body with recesses. The recesses are each made in the form of a polygon with rounded corners. A piezoelectric actuator with such a spring element is also specified.
Inventors
- 👤 Werner Stocker
- 👤 Franz Veronik
- 👤 Andreas Jakope
- 👤 Manfred Reinisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:28
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/88; H10N30/886; F; F16; F16F; F16F1/00; F16F1/02; F16F1/025; F16F1/028; F16F15/00; F16F15/005; F16F15/007; H10N30/50; F16F2228/00; F16F2228/08
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
33 words
A spring element for pretensioning a piezoelectric actuator, comprising a tubular body that has a plurality of recesses, wherein each recess has a shape in the form of a rhombus with rounded corners.
Claim 2
Dependent Claim
33 words
A spring element for pretensioning a piezoelectric actuator, comprising a tubular body that has a plurality of recesses, wherein each recess has a shape in the form of a rhombus with rounded corners.
Claim 3
Dependent Claim
18 words
The spring element as in claim 1 , wherein each and every corner of each recess is rounded.
Claim 4
Dependent Claim
17 words
The spring element as in claim 1 , wherein the recesses are arranged in a regular pattern.
Claim 5
Dependent Claim
37 words
The spring element as in claim 3 , wherein the recesses are arranged in rows, wherein each recess of a first row matches to a recess of a second row in the projection along the tubular axis.
Claim 6
Dependent Claim
23 words
The spring element as in claim 1 , wherein the tubular body has an outer contour in the form of a regular polygon.
Claim 7
Dependent Claim
21 words
The spring element as in claim 1 , wherein the tubular body has an outer contour with a continuously curved shape.
Claim 8
Dependent Claim
14 words
The spring element as in claim 1 , wherein the tubular body is seamless.
Claim 9
Dependent Claim
16 words
The spring element as in claim 1 , wherein the tubular body has a varying thickness.
Claim 10
Dependent Claim
14 words
The spring element as in claim 8 , wherein the tubular body is profiled.
Claim 11
Dependent Claim
59 words
A piezoelectric actuator comprising: a piezoelectric multilayer component with a plurality of stacked piezoelectric layers and electrode layers, and a spring element comprising a tubular body with a plurality of recesses, each recess having a shape in the form of a rhombus with rounded corners, wherein the piezoelectric multilayer element is arranged at least partially within the spring element.
Claim 12
Dependent Claim
59 words
A piezoelectric actuator comprising: a piezoelectric multilayer component with a plurality of stacked piezoelectric layers and electrode layers, and a spring element comprising a tubular body with a plurality of recesses, each recess having a shape in the form of a rhombus with rounded corners, wherein the piezoelectric multilayer element is arranged at least partially within the spring element.
Claim 13
Dependent Claim
20 words
The piezoelectric actuator as in claim 10 , wherein the spring element puts the piezoelectric multilayer element under pressure tensioning.
Claim 14
Dependent Claim
32 words
The piezoelectric actuator as in claim 10 , wherein the spring element is bonded at end sides with a bearing support that clamps the electric multilayer element at upper and lower sides.
Claim 15
Dependent Claim
18 words
The piezoelectric actuator as in claim 12 , wherein the spring element is welded to the bearing support.
Claim 16
Dependent Claim
19 words
The piezoelectric actuator as in claim 10 , wherein each electrode layer is connected to an electric connecting element.
Claim 17
Dependent Claim
28 words
The piezoelectric actuator as in claim 14 , wherein at least one of the electric connecting elements is brought out through at least one of the bearing supports.
Claim 18
Dependent Claim
25 words
The piezoelectric actuator as in claim 14 , wherein at least one of the electric connecting elements comprises an electric lead of the piezoelectric actuator.
Claim 19
Dependent Claim
40 words
The piezoelectric actuator as in claim 14 , wherein the at least one of the electric connecting elements comprises a contacting layer that is applied to a surface of the piezoelectric multilayer element and is connected to the electrode layers.
Claim 20
Dependent Claim
17 words
The piezoelectric actuator as in claim 10 , wherein the recesses are arranged in a regular pattern.
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