US4999536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrator-type actuator
Assignee: Individual
•
Filing: 1989-05-26
•
Granted: 1991-03-12
•
Expires: 2009-05-26
Abstract
Abstract An actuator includes a pillar shaped ceramic piezoelectric body, a pair of electrodes formed on both base surfaces of the piezoelectric body, and a moving element made to contact with the side surface of the piezoelectric body in the longitudinal direction. A sheet provided in the longitudinal direction between two piezoelectric bodies is moved by driving the piezoelectric bodies. A roller is made to contact with the side of the piezoelectric body and a paper is pressed against the roller for feeding the paper. The side surface in the longitudinal direction of the foregoing piezoelectric body can alternatively be made to contact with the surface of a rail which guides the piezoelectric body movement.
Inventors
- 👤 Kohzi Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/20; H02; H02N; H02N2/00; H02N2/0005; H02N2/001; H02N2/002; H02N2/02; H02N2/026; H02N2/10; H02N2/103; H10N30/206
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
86 words
A vibrator-type actuator comprising: a pillar shaped ceramic piezoelectric body having a base surface at each end and a plurality of plane surfaces along the longitudinal direction formed at the symmetrical positions with regard to the axis direction of said piezoelectric body, said pillar shaped ceramic piezoelectric body being polarized in the longitudinal direction; a pair of electrodes formed on both base surfaces of said piezoelectric body; and a moving element made to contact with a side surface of said piezoelectric body in the longitudinal direction.
Claim 2
Dependent Claim
86 words
A vibrator-type actuator comprising: a pillar shaped ceramic piezoelectric body having a base surface at each end and a plurality of plane surfaces along the longitudinal direction formed at the symmetrical positions with regard to the axis direction of said piezoelectric body, said pillar shaped ceramic piezoelectric body being polarized in the longitudinal direction; a pair of electrodes formed on both base surfaces of said piezoelectric body; and a moving element made to contact with a side surface of said piezoelectric body in the longitudinal direction.
Claim 3
Dependent Claim
22 words
An actuator according to claim 1, the lengths of said piezoelectric body in the radial and longitudinal direction being substantially the same.
Claim 4
Dependent Claim
20 words
An actuator according to claim 1, further comprising driving circuit means for supplying a driving signal to said piezoelectric body.
Claim 5
Dependent Claim
12 words
An actuator according to claim 1, said piezoelectric body being substantially cylindrical.
Claim 6
Dependent Claim
26 words
An actuator according to claim 3, said driving signal being an alternative signal having almost the same frequency as the resonance frequency of said piezoelectric body.
Claim 7
Dependent Claim
26 words
An actuator according to claim 3, said driving signal being a pulse signal of substantially the same frequency as the resonance frequency of said piezoelectric body.
Claim 8
Dependent Claim
19 words
An actuator according to claim 1, further comprising pressing means for pressing said piezoelectric body against said moving element.
Claim 9
Dependent Claim
43 words
An actuator according to claim 1, one electrode of said paired electrodes being electrically separated into two electrodes and said driving signal being alternatively supplied between one of said separated electrodes through a switch means and the other electrode of said pair electrodes.
Claim 10
Dependent Claim
27 words
An actuator according to claim 1, further comprising a roller provided between said piezoelectric body and said moving element for transmitting driving force to said moving element.
Claim 11
Dependent Claim
29 words
An actuator according to claim 9, further comprising means for maintaining the contact pressure between said roller and said piezoelectric body and between said roller and said moving element.
Claim 12
Dependent Claim
30 words
An actuator according to claim 9, having a metal layer formed on the surface of said piezoelectric body and said piezoelectric body contacting with said roller at said metal layer.
Claim 13
Dependent Claim
100 words
A paper feed apparatus comprising: a pillar shaped piezoelectric vibrator having two base surfaces on which a pair of electrodes are formed; a first roller made to contact with a side surface of said piezoelectric vibrator in the longitudinal direction and rotated by a circumference direction force due to the driving of said piezoelectric vibrator; a supporting means for maintaining the distance between the rotational axis of said first roller and said piezoelectric vibrator to stably apply a contact pressure between said first roller and said piezoelectric vibrator; and a pressing means for pressing said first roller against a paper.
Claim 14
Dependent Claim
100 words
A paper feed apparatus comprising: a pillar shaped piezoelectric vibrator having two base surfaces on which a pair of electrodes are formed; a first roller made to contact with a side surface of said piezoelectric vibrator in the longitudinal direction and rotated by a circumference direction force due to the driving of said piezoelectric vibrator; a supporting means for maintaining the distance between the rotational axis of said first roller and said piezoelectric vibrator to stably apply a contact pressure between said first roller and said piezoelectric vibrator; and a pressing means for pressing said first roller against a paper.
Claim 15
Dependent Claim
45 words
An apparatus according to claim 12, wherein said pressing means includes a second roller for rotating around the axis parallel to the axis of said first roller and a holding means for holding the paper between said first and second rollers with a predetermined pressure.
Claim 16
Dependent Claim
35 words
An apparatus according to claim 12, one electrode of the pair of electrodes being electrically separated into two electrodes and said driving signal being supplied to one of said separated electrodes through a switch means.
Claim 17
Dependent Claim
17 words
An apparatus according to claim 12, said pillar shaped piezoelectric vibrator being square shaped in cross section.
Claim 18
Dependent Claim
22 words
An apparatus according to claim 12, at lease a part of a side surface of said piezoelectric vibrator being a flat plane.
Claim 19
Dependent Claim
33 words
An apparatus according to claim 12, a metal layer being formed on a part of a surface of said piezoelectric vibrator and said first roller being made to contact with said metal layer.
Claim 20
Dependent Claim
131 words
A moving apparatus comprising: a pillar shaped piezoelectric body having two base surfaces perpendicular to the poling axis on which a pair of electrodes are formed and two flat surfaces provided at symmetrical positions; a driving circuit means for supplying a driving signal to said pair of electrodes; a rail at least a part of which being made to contact with the side surface, in the longitudinal direction, of said piezoelectric body and which guides the movement of said piezoelectric body, the sectional shape of said rail being U-shaped and the base portion of said U-shaped rail being made to contact with the side surface in the longitudinal direction of said piezoelectric body with a predetermined contact pressure; and a slide frame fixed with said piezoelectric body at said flat surfaces.
Claim 21
Dependent Claim
131 words
A moving apparatus comprising: a pillar shaped piezoelectric body having two base surfaces perpendicular to the poling axis on which a pair of electrodes are formed and two flat surfaces provided at symmetrical positions; a driving circuit means for supplying a driving signal to said pair of electrodes; a rail at least a part of which being made to contact with the side surface, in the longitudinal direction, of said piezoelectric body and which guides the movement of said piezoelectric body, the sectional shape of said rail being U-shaped and the base portion of said U-shaped rail being made to contact with the side surface in the longitudinal direction of said piezoelectric body with a predetermined contact pressure; and a slide frame fixed with said piezoelectric body at said flat surfaces.
Claim 22
Dependent Claim
16 words
An apparatus according to claim 18, said pillar shaped piezoelectric body being a cylindrical piezoelectric body.
References Cited (Backward Citations)
US2870521A
Cited
US2838696A
Cited
US2838695A
Cited
US3171696A
Cited
US3211931A
Cited
SU197709A1
Cited
SU399036A1
Cited
US4019073A
Cited
SU851560A1
Cited
SU845198A1
Cited
SU817816A1
Cited
SU851563A1
Cited
SU987714A1
Cited
US4400641A
Cited
US4453103A
Cited
US4663556A
Cited
US4634916A
Cited
SU1287088A1
Cited
US4734610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-11 | 1994-09-10 | 1995-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-11 | 1998-09-10 | 1999-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-11 | 2002-09-10 | 2003-03-12 | $7700.00 | Window Closed / Lapsed |