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Patent US4950931A successfully refreshed from Google Patents.
US4950931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrator
Assignee: Motorola Solutions Inc
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Filing: 1989-01-17
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Granted: 1990-08-21
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Expires: 2009-01-17
Abstract
Abstract A vibrator (2) comprising: a massive, magnetic member (16) arranged for movement about a reference position; and electromagnetic actuator means (12) for causing said member to move; and magnetic suspension means (8, 10) arranged on either side of said member for suspending said member therebetween.
Inventors
- 👤 Michael Goldenberg
- 👤 John M. McKee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:14
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/18; H02K33/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A vibrator comprising: a massive, magnetic member arranged for movement about a reference position, said member comprising a first permanent magnet; electromagnetic actuator means for causing said member to move, said actuator means comprising an electromagnetic coil; and magnetic means arranged on either side of said member for suspending said member therebetween, said magnetic means comprising second and third permanent magnets arranged respectively on either side of said first permanent magnet.
Claim 2
Dependent Claim
71 words
A vibrator comprising: a massive, magnetic member arranged for movement about a reference position, said member comprising a first permanent magnet; electromagnetic actuator means for causing said member to move, said actuator means comprising an electromagnetic coil; and magnetic means arranged on either side of said member for suspending said member therebetween, said magnetic means comprising second and third permanent magnets arranged respectively on either side of said first permanent magnet.
Claim 3
Dependent Claim
22 words
A vibrator according to claim 1 further comprising pivot means arranged for restraining said member for pivotal movement about said reference position.
Claim 4
Dependent Claim
24 words
A vibrator according to claim 1 wherein said member, said actuator means and said magnetic suspension means are arranged in substantially the same plane.
Claim 5
Dependent Claim
20 words
A vibrator according to claim 1 wherein said vibrator is housed in the resonant cavity of a piezoelectric acoustic transducer.
Claim 6
Dependent Claim
33 words
A vibrator according to claim 1 further comprising protection means between said member and said suspension means for reducing impact damage therebetween in the event of said vibrator being subjected to mechanical shock.
Claim 7
Dependent Claim
19 words
A vibrator according to claim 1 wherein said first, second and third permanent magnets are made of samarium cobalt.
Claim 8
Dependent Claim
42 words
A vibrator comprising: a magnetic member arranged for movement about an equilibrium position; electromagnetic actuator means for causing said member to move; and magnetic means arranged on either side of said member for magnetically positioning said member therebetween in the equilibrium position.
Claim 9
Dependent Claim
42 words
A vibrator comprising: a magnetic member arranged for movement about an equilibrium position; electromagnetic actuator means for causing said member to move; and magnetic means arranged on either side of said member for magnetically positioning said member therebetween in the equilibrium position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |