US6681462B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a piezoelectric structural unit
Assignee: Aumovio Germany GmbH
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Filing: 2000-02-07
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Granted: 2004-01-27
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Expires: 2020-02-07
Abstract
Abstract A method for producing a structural unit with a prestressed piezoelectric actuator includes the steps of inserting a front end of the actuator into a hollow body, form-lockingly or force-lockingly connecting the inserted front end of the actuator to the hollow body, pressing the actuator into the hollow body with a defined force establishing a prestress of the actuator, and force-lockingly or form-lockingly connecting the actuator to the hollow body in the vicinity of a rear end of the actuator, for fixing the prestress of the actuator.
Inventors
- 👤 Wilhelm Frank
- 👤 Günter Lewentz
- 👤 Andreas Voigt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:11
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/025; F16F1/028; H; H10; H10N; H10N30/00; H10N30/50; H10N30/80; H10N30/88; H10N30/886; Y; Y10; Y10T; Y10T29/00; Y10T29/42; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A method for producing a piezoelectric structural unit, which comprises: a) inserting a front end of a piezoelectric actuator into a hollow body having a longitudinal direction; b) force-lockingly or form-lockingly connecting the inserted front end of the actuator to the hollow body; c) pressing the actuator into the hollow body with a defined force in the longitudinal direction for prestressing and establishing a desired prestress of the actuator in the longitudinal direction; and then d) force-lockingly or form-lockingly connecting the actuator to the hollow body in the vicinity of a rear end of the actuator, for fixing the desired prestress of the actuator.
Claim 2
Independent Claim
104 words
A method for producing a piezoelectric structural unit, which comprises: a) inserting a front end of a piezoelectric actuator into a hollow body having a longitudinal direction; b) force-lockingly or form-lockingly connecting the inserted front end of the actuator to the hollow body; c) pressing the actuator into the hollow body with a defined force in the longitudinal direction for prestressing and establishing a desired prestress of the actuator in the longitudinal direction; and then d) force-lockingly or form-lockingly connecting the actuator to the hollow body in the vicinity of a rear end of the actuator, for fixing the desired prestress of the actuator.
Claim 3
Dependent Claim
92 words
The method according to claim 1 , which further comprises: force-lockingly or form-lockingly connecting an open end of the hollow body to a first cover plate for closing the open end, before the step of inserting the actuator; placing a second top plate on the inserted actuator and pressing the second top plate into the hollow body with a given force; and force-lockingly or form-lockingly connecting the second cover plate to the hollow body while maintaining the given force, for permanently prestressing the actuator with the hollow body in the longitudinal direction.
Claim 4
Dependent Claim
24 words
The method according to claim 1 , which comprises elastically elongating the hollow body in the longitudinal direction during the prestressing of the actuator.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-01-26 | 2007-07-28 | 2008-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-26 | 2011-07-28 | 2012-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-26 | 2015-07-28 | 2016-01-27 | $7700.00 | Window Closed / Lapsed |