US6984924B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric actuator unit
Assignee: Aumovio Germany GmbH
•
Filing: 1999-08-05
•
Granted: 2006-01-10
•
Expires: 2019-08-05
Abstract
Abstract An actuator unit has an elastically configured hollow body in which a piezoelectric actuator is biased, the hollow body being provided with holes which are of a dumb-bell shape and run transversely of the hollow body's axis.
Inventors
- 👤 Andreas Voigt
- 👤 Wilhelm Frank
- 👤 Günter Lewentz
- 👤 Claus Zumstrull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:54
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/025; F16F1/028; F02; F02M; F02M63/00; F02M63/0012; F02M63/0014; F02M63/0015; F02M63/0026; H; H02; H02N; H02N2/00; H02N2/02; H02N2/04; H02N2/043; F02M2200/00; F02M2200/50; F16F2224/00; F16F2224/02; F16F2224/0283
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
71 words
An actuator unit comprising: a piezoelectric actuator; contact pins arranged along the actuator conductive connection with said actuator; and a hollow body having the piezoelectric actuator disposed therein, said hollow body being elastic and biasing the actuator, wherein the hollow body is joined tensionally and/or positively to upper and lower ends of the actuator, said hollow body having holes therein of a dumb-bell shape running transversely of the hollow body's axis.
Claim 2
Dependent Claim
71 words
An actuator unit comprising: a piezoelectric actuator; contact pins arranged along the actuator conductive connection with said actuator; and a hollow body having the piezoelectric actuator disposed therein, said hollow body being elastic and biasing the actuator, wherein the hollow body is joined tensionally and/or positively to upper and lower ends of the actuator, said hollow body having holes therein of a dumb-bell shape running transversely of the hollow body's axis.
Claim 3
Dependent Claim
33 words
The actuator unit according to claim 1 , wherein the piezoelectric actuator is gripped in its direction of expansion between upper and lower cover plates tensionally and/or positively joined to the hollow body.
Claim 4
Dependent Claim
30 words
The actuator unit according to claim 1 , wherein the holes are arranged in rows one above the other, the holes of the rows being laterally offset from one another.
Claim 5
Dependent Claim
30 words
The actuator unit according to claim 3 , wherein the minimum distance between adjacent holes of two rows is one or three times the wall thickness of the hollow body.
Claim 6
Dependent Claim
21 words
The actuator unit according to claim 1 , wherein the holes are distributed uniformly over the circumference of the hollow body.
Claim 7
Dependent Claim
22 words
The actuator unit according to claim 1 , wherein the hollow body is made of steel and the holes are punched holes.
Claim 8
Dependent Claim
27 words
The actuator unit according to claim 1 , wherein the hollow body has at least one weld seam joining together two abutting edges of the hollow body.
Claim 9
Dependent Claim
29 words
The actuator unit according to claim 1 , wherein the hollow body has two abutment edges associated with one another extending and over the length of the hollow body.
Claim 10
Dependent Claim
21 words
The hollow body according to claim 1 , wherein the holes are distributed uniformly over the circumference of the hollow body.
Claim 11
Dependent Claim
22 words
The hollow body according to claim 1 , wherein the hollow body is made of spring steel and the holes are punched.
Claim 12
Dependent Claim
28 words
The hollow body according to claim 1 , wherein the hollow body has at least one weld seam which joins together two abutting edges of the hollow body.
Claim 13
Dependent Claim
32 words
The hollow body according to claim 1 , wherein the hollow body has two abutment edges which are associated with one another and extend over the entire length of the hollow body.
Claim 14
Dependent Claim
15 words
The actuator unit of claim 1 , wherein the hollow body comprises a tubular spring.
Claim 15
Dependent Claim
25 words
The actuator unit of claim 1 , wherein the holes of a dumb-bell shape each comprise two side-by-side circular holes joined together by a slot.
Claim 16
Dependent Claim
20 words
The actuator unit of claim 14 , wherein the circular holes range from about 0.8 to 1.6 mm in diameter.
Claim 17
Dependent Claim
31 words
The actuator unit of claim 14 , wherein the centers of two circular holes connected by a slot are separated by a distance in a range from 1.5 to 3.5 mm.
Claim 18
Dependent Claim
16 words
The actuator unit of claim 13 , wherein the hollow body is comprised of spring steel.
Claim 19
Dependent Claim
15 words
The actuator of claim 13 , wherein the hollow body is comprised of copper-beryllium alloy.
References Cited (Backward Citations)
DE693338C
Cited
US4174799A
Cited
GB2106001A
Cited
DE3602673A1
Cited
JPS631383A
Cited
DE3844134A1
Cited
DE3833109A1
Cited
US5166908A
Cited
US5410207A
Cited
US5557974A
Cited
US5675886A
Cited
US6135234A
Cited
US6274967B1
Cited
US6494288B1
Cited
US6265810B1
Cited
US6499471B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-01-09 | 2009-07-11 | 2010-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-09 | 2013-07-11 | 2014-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-09 | 2017-07-11 | 2018-01-10 | $7700.00 | Window Closed / Lapsed |