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US5780958A
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Piezoelectric vibrating device
Assignee: Aura Systems Inc
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Filing: 1995-11-03
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Granted: 1998-07-14
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Expires: 2015-11-03
Abstract
Abstract A piezoelectric vibrating device is disclosed. The device includes a case having a first compartment with a first compartment height. A bender element, fabricated from an piezoelectric material, is disposed within the first compartment. A motion limiter is disposed within the case for preventing damage to the bender. The motion limiter has a first portion that abuts against the case to prevent the first compartment height from compressing beyond a predetermined first compartment minimal height. The device further includes electronic controls for providing a signal to the bender element. The electronic controls further include an optimal wave form signal generator. The wave form may also be a square wave, pulse train, truncated wave or other type of wave depending on each particular application.
Inventors
- 👤 Michael G. Strugach
- 👤 Andrei Szilagyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:50
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/12; G10K9/122; G10K9/18; G10K9/22; H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2047
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A piezoelectric vibrating device comprising: a case having a first compartment and a second compartment, said first compartment defining a vertical axis and having a first compartment height along said vertical axis, said second compartment having a second compartment height; a bender element fabricated from an electroactive material, said bender element disposed within said first compartment and further wherein at least a portion of said bender element being axially moveable within said first compartment; and a motion limiter disposed within said case for preventing damage to said bender element, said motion limiter having a first portion that abuts against said case to prevent said first compartment height from axially compressing beyond a predetermined first compartment minimal height, said motion limiter further having a second portion that abuts against said case to prevent said second compartment height from compressing beyond a predetermined second compartment minimal height.
Claim 2
Dependent Claim
145 words
A piezoelectric vibrating device comprising: a case having a first compartment and a second compartment, said first compartment defining a vertical axis and having a first compartment height along said vertical axis, said second compartment having a second compartment height; a bender element fabricated from an electroactive material, said bender element disposed within said first compartment and further wherein at least a portion of said bender element being axially moveable within said first compartment; and a motion limiter disposed within said case for preventing damage to said bender element, said motion limiter having a first portion that abuts against said case to prevent said first compartment height from axially compressing beyond a predetermined first compartment minimal height, said motion limiter further having a second portion that abuts against said case to prevent said second compartment height from compressing beyond a predetermined second compartment minimal height.
Claim 3
Dependent Claim
115 words
A piezoelectric vibrating device comprising: a case having a first compartment, said first compartment defining a vertical axis and having a first compartment height along said vertical axis; a bender element fabricated from an electroactive material, said bender element disposed within said first compartment and further wherein at least a portion of said bender element being axially moveable within said first compartment; a motion limiter disposed within said case for preventing damage to said bender element, said motion limiter having a first portion that abuts against said case to prevent said first compartment height from axially compressing beyond a predetermined first compartment minimal height; and a spring disposed intermediate said motion limiter and said case.
Claim 4
Dependent Claim
115 words
A piezoelectric vibrating device comprising: a case having a first compartment, said first compartment defining a vertical axis and having a first compartment height along said vertical axis; a bender element fabricated from an electroactive material, said bender element disposed within said first compartment and further wherein at least a portion of said bender element being axially moveable within said first compartment; a motion limiter disposed within said case for preventing damage to said bender element, said motion limiter having a first portion that abuts against said case to prevent said first compartment height from axially compressing beyond a predetermined first compartment minimal height; and a spring disposed intermediate said motion limiter and said case.
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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) | 2001-07-13 | 2002-01-12 | 2002-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-13 | 2006-01-12 | 2006-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-13 | 2010-01-12 | 2010-07-14 | $7700.00 | Window Closed / Lapsed |