US4488080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectrical control element
Assignee: Honeywell GmbH
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Filing: 1983-05-09
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Granted: 1984-12-11
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Expires: 2003-05-09
Abstract
Abstract A piezoelectrical control element consists of a package comprising a plurality of piezoceramic disks piled onto each other and of intermediately arranged electrodes whereat the package is loosely piled up and mechanically biased and held together by a resilient element.
Inventors
- 👤 Rainer Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:52
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/88; H10N30/886; H10N30/50; H10N30/503; H10N30/505
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A piezoelectrical control element comprising: a loosely piled stack of at least two piezoelectrical elements and intermediately arranged electrodes, said stack having a central passing through recess; base plate means; back-pressure plate means having a central portion extending through said central passing through recess; said stack sandwiched between said base plate means and said back-pressure plate means; resilient means for displaceably biasing said back-pressure plate means relative to said base means; and coupling means having a curved end portion abutting said resilient means for coupling said back-pressure plate means and said resilient means.
Claim 2
Dependent Claim
93 words
A piezoelectrical control element comprising: a loosely piled stack of at least two piezoelectrical elements and intermediately arranged electrodes, said stack having a central passing through recess; base plate means; back-pressure plate means having a central portion extending through said central passing through recess; said stack sandwiched between said base plate means and said back-pressure plate means; resilient means for displaceably biasing said back-pressure plate means relative to said base means; and coupling means having a curved end portion abutting said resilient means for coupling said back-pressure plate means and said resilient means.
Claim 3
Dependent Claim
20 words
The control element of claim 1 wherein said back-pressure plate is comprised of the same material as said piezoelectrical elements.
Claim 4
Dependent Claim
90 words
A piezoelectrical control element comprising: a loosely piled stack of at least two piezoelectrical elements and intermediately arranged electrodes, said stack having a central passing through recess; base plate means; back-pressure plate means having a central portion extending through said central passing through recess; and said stack sandwiched between said base plate means and said back-pressure plate means; resilient means having a double diaphragm means for displaceably biasing said back-pressure plate means relative to said base plate means; coupling means for coupling said back-pressure plate means and said double diaphragm.
Claim 5
Dependent Claim
90 words
A piezoelectrical control element comprising: a loosely piled stack of at least two piezoelectrical elements and intermediately arranged electrodes, said stack having a central passing through recess; base plate means; back-pressure plate means having a central portion extending through said central passing through recess; and said stack sandwiched between said base plate means and said back-pressure plate means; resilient means having a double diaphragm means for displaceably biasing said back-pressure plate means relative to said base plate means; coupling means for coupling said back-pressure plate means and said double diaphragm.
Claim 6
Dependent Claim
18 words
The apparatus of claim 3 wherein said coupling means includes a spherical end portion abutting said double diaphragm.
Claim 7
Dependent Claim
19 words
The apparatus of claim 3 wherein said back-pressure plate means is of the same material as said piezoelectrical elements.
Claim 8
Dependent Claim
35 words
The control element of claim 3 wherein said diaphragm means includes a first means having a diaphragm and a second means also having a diaphragm, said first and second means coupled to function in unison.
Claim 9
Dependent Claim
38 words
The control element of claim 6 wherein said diaphragm means consists of Zerodur and both of said first and second means are in optical contact or are connected with each other by means of a gold diffusion process.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |