US4857791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear motor
Assignee: Nissan Motor Co Ltd
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Filing: 1988-06-03
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Granted: 1989-08-15
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Expires: 2008-06-03
Abstract
Abstract A linear motor is arranged to have two legs each of which have a different resonance frequency, when one of the legs is induced to resonate by applying a vibration having a frequency which corresponds to the resonance frequency of one of the legs, to the chassis of the motor, the motor proceeds in a first direction, while when a vibration having a second frequency which corresponds to the resonance frequency of the other leg is applied, the motor is propelled linearly in the other direction.
Inventors
- 👤 Kenji Uchino
- 👤 Kazumasa Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/02; H02N2/026; H02N2/0005; H02N2/001; H02N2/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
A linear motor comprising: a chassis, said chassis having first and second leg portions, said first leg portion having a first resonance frequency, said second leg portion having a second resonance frequency which is different from the first one; a vibrator, said vibration being secured to said chassis in a manner to induce said chassis to vibrate when energized, said vibrator being connected to a control circuit and arranged to selectively vibrate said member at first and second frequencies which correspond to said first and second resonance frequencies.
Claim 2
Dependent Claim
88 words
A linear motor comprising: a chassis, said chassis having first and second leg portions, said first leg portion having a first resonance frequency, said second leg portion having a second resonance frequency which is different from the first one; a vibrator, said vibration being secured to said chassis in a manner to induce said chassis to vibrate when energized, said vibrator being connected to a control circuit and arranged to selectively vibrate said member at first and second frequencies which correspond to said first and second resonance frequencies.
Claim 3
Dependent Claim
53 words
A linear motor as claimed in claim 1 wherein said chassis has an essentially H-shape and comprises: two upright members which extends essentially normally to a surface on which the motor is arranged, and a cross-member which interconnects said two upright members, said vibrator being connected between said upright members above said cross-member.
Claim 4
Dependent Claim
63 words
A linear motor as claimed in claim 1 wherein said chassis has an essentially inverted U-shape and comprises: two upright members which extend essentially normally to a surface on which the motor is arranged, and a cross-member which merges with the upper ends of the two upright members, said vibrator being disposed between said upright members at a level lower than said cross-member.
Claim 5
Dependent Claim
55 words
A linear motor as claimed in claim 1 wherein said chassis has an essentially inverted U-shape and comprises: two upright members which extend essentially normally to a surface on which the motor is arranged, and a cross-member which merges with the upper ends of the two upright members, said vibrator being disposed on said cross-member.
Claim 6
Dependent Claim
25 words
A linear motor as claimed in claim 1 wherein said vibrator comprises: a multi-plate piezo device which is compiled by suitably arranging single plate elements.
Claim 7
Dependent Claim
24 words
A linear motor as claimed in claim 1 wherein said vibrator comprises: an electrostrictive device which is compiled by suitably arranging single plate elements.
Claim 8
Dependent Claim
88 words
In a method of producing linear motion arranging a first leg of a motor to have a first resonance frequency; arranging a second leg of the motor to have a second resonance frequency which is different from said first resonance frequency; inducing the motor to produce linear motion in a first direction by applying a vibration having a frequency which coincides with said first resonance; and inducing the motor to produce linear motion in second direction by applying vibration having frequency which coincides with said second resonance frequency.
Claim 9
Dependent Claim
88 words
In a method of producing linear motion arranging a first leg of a motor to have a first resonance frequency; arranging a second leg of the motor to have a second resonance frequency which is different from said first resonance frequency; inducing the motor to produce linear motion in a first direction by applying a vibration having a frequency which coincides with said first resonance; and inducing the motor to produce linear motion in second direction by applying vibration having frequency which coincides with said second resonance frequency.
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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |