Patent US5229744A successfully refreshed from Google Patents.
US5229744A
Expired / Lapsed
US
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Piezoelectric type pager
Assignee: Niterra Co Ltd
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Filing: 1991-11-25
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Granted: 1993-07-20
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Expires: 2011-11-25
Abstract
Abstract A piezoelectric type pager comprises at least one piezoelectric vibrator which has one end fixed on a portion of a casing and the other end fixed on another portion of the casing and can generate a vibration which has a frequency suitable to attract a user's attention without causing any trouble for those around one carrying the pager.
Inventors
- 👤 Kohji Ogura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:41
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/10; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0603; G; G08; G08B; G08B6/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A piezoelectric type pager comprising at least one flexible piezoelectric vibrator, a driver circuit unit for actuating said at least one piezoelectric vibrator, an electric source for energizing said at least one piezoelectric vibrator and said driver circuit unit, a casing separated into first and second casing portions for containing said at least one piezoelectric vibrator and said electric source, said at least one piezoelectric vibrator having first and second ends, the first end of said at least one piezoelectric vibrator being affixed to said first casing portion such that said first casing portion is caused to vibrate when said at least one piezoelectric vibrator is actuated and the second end of said at least one piezoelectric vibrator being affixed to said second casing portion such that said second casing portion is caused to vibrate when said at least one piezoelectric vibrator is actuated, said first and second casing portions being assembled with a small spacing therebetween.
Claim 2
Dependent Claim
157 words
A piezoelectric type pager comprising at least one flexible piezoelectric vibrator, a driver circuit unit for actuating said at least one piezoelectric vibrator, an electric source for energizing said at least one piezoelectric vibrator and said driver circuit unit, a casing separated into first and second casing portions for containing said at least one piezoelectric vibrator and said electric source, said at least one piezoelectric vibrator having first and second ends, the first end of said at least one piezoelectric vibrator being affixed to said first casing portion such that said first casing portion is caused to vibrate when said at least one piezoelectric vibrator is actuated and the second end of said at least one piezoelectric vibrator being affixed to said second casing portion such that said second casing portion is caused to vibrate when said at least one piezoelectric vibrator is actuated, said first and second casing portions being assembled with a small spacing therebetween.
Claim 3
Dependent Claim
43 words
A piezoelectric type pager as claimed in claim 1, wherein the first casing portion of said casing is provided with a chamber for containing said driver circuit unit, and the second casing portion is provided with a chamber for containing said electric source.
Claim 4
Dependent Claim
31 words
A piezoelectric type pager as claimed in claim 1, wherein at least one each piezoelectric vibrator comprises a sheet spring member and piezoelectric elements fixed on upper and bottom surfaces thereof.
Claim 5
Dependent Claim
58 words
A piezoelectric type pager as claimed in claim 1, wherein two piezoelectric vibrators are juxtaposingly arranged between said first and second casing portions, a first end of each of the two piezoelectric vibrators being affixed to the first casing portion and a second end of each of the two piezoelectric vibrators being affixed to the second casing portion.
Claim 6
Dependent Claim
26 words
A piezoelectric type pager as claimed in claim 1, wherein said first and second casing portions function as weights for said at least one piezoelectric vibrator.
References Cited (Backward Citations)
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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) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |