US4777398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric motor
Assignee: Juki Corp
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Filing: 1987-05-08
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Granted: 1988-10-11
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Expires: 2007-05-08
Abstract
Abstract A displacement transmitting apparatus comprising a shaft hole which throttles by piezoelectric effect, and a shaft slidably inserted into the shaft hole engaged with a driving means which advances steppingly by mechanically amplified piezoelectric effect. On-off controlling of electric voltage for the displacement transmitting apparatus and the driving means causes the shaft to advance or conversely causes the driving means to advance where the shaft is fixed.
Inventors
- 👤 Tsuyoshi Shibuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:13
CPC Classifications
H; H02; H02N; H02N2/00; H02N2/10; H02N2/101; H02N2/02; H02N2/021; H02N2/023
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A piezoelectric motor, comprising: a shaft; displacement transmitting means, including a first piezoelectric element, a shaft holding member having a bearing hole therein for throttling and releasing the shaft in response to displacement of the first piezoelectric element, and a stopper pin; driving means, including a base plate, a second piezoelectric element fixed to the base plate, projection means fixed to the base plate and adapted to engage with the stopper pin and mechanically amplify the displacement of the second piezoelectric element; means for intermittently applying electric voltage to the first and second piezoelectric elements there effecting movement of the shaft.
Claim 2
Dependent Claim
101 words
A piezoelectric motor, comprising: a shaft; displacement transmitting means, including a first piezoelectric element, a shaft holding member having a bearing hole therein for throttling and releasing the shaft in response to displacement of the first piezoelectric element, and a stopper pin; driving means, including a base plate, a second piezoelectric element fixed to the base plate, projection means fixed to the base plate and adapted to engage with the stopper pin and mechanically amplify the displacement of the second piezoelectric element; means for intermittently applying electric voltage to the first and second piezoelectric elements there effecting movement of the shaft.
Claim 3
Dependent Claim
12 words
An apparatus as recited in claim 1, wherein said shaft is curved.
Claim 4
Dependent Claim
17 words
An apparatus as recited in claim 1, wherein said shaft is fixed and said driving section moves.
Claim 5
Dependent Claim
17 words
An apparatus as recited in claim 2, wherein said shaft is fixed and said driving section moves.
Claim 6
Dependent Claim
24 words
An apparatus as recited in claim 1, wherein wherein said displacement transmitting means and said driving means are fixedly attached to a holding plate.
Claim 7
Dependent Claim
12 words
An apparatus as recited in claim 5, wherein said shaft is curved.
Claim 8
Dependent Claim
17 words
An apparatus as recited in claim 5, wherein said shaft is fixed and said driving section moves.
Claim 9
Dependent Claim
17 words
An apparatus as recited in claim 6, wherein said shaft is fixed and said driving section moves.
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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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |