Patent US3178227A successfully refreshed from Google Patents.
Patent US5121025A successfully refreshed from Google Patents.
US5121025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrator-type actuator
Assignee: Individual
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Filing: 1990-08-28
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Granted: 1992-06-09
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Expires: 2010-08-28
Abstract
Abstract A pair of electrodes are formed on both end surfaces of a pillar-shaped piezoelectric body polarized in a longitudinal axial direction thereof. A cover is formed on at least a part of a side surface of the piezoelectric body. The cover is made of material having high wear resistant and large heat conductivity characteristics. The electrode is formed on a part of the end surface. A moving element is pressed against the cover of the piezoelectric body. The cover is secured to supporting means at a portion of the side surface of the cover where a small vibration displacement is caused. Each of the paired electrodes are formed at essentially symmetrical portions with respect to a center point of the piezoelectric body or at asymmetrical portions with respect to a plane perpendicular to the longitudinal direction.
Inventors
- 👤 Kohji Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:59
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; H10N30/80; H10N30/88; H10N30/883
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
83 words
A piezoelectric vibrator comprising: a pillar shaped piezoelectric body having two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; and a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics.
Claim 2
Dependent Claim
83 words
A piezoelectric vibrator comprising: a pillar shaped piezoelectric body having two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; and a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics.
Claim 3
Dependent Claim
17 words
A piezoelectric vibrator as set forth in claim 1, said cover being made from a metal material.
Claim 4
Dependent Claim
26 words
A piezoelectric vibrator as set forth in claim 1, said second electrode formed nearly completely on said other end surface being electrically separated into two electrodes.
Claim 5
Dependent Claim
100 words
A vibrator-type actuator comprising: a pillar shaped piezoelectric body having two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; a cover covering at least a part of a side surface of said piezoelectric body, said cover being made from a material having high wear resistant and large hat conductive characteristics; and a moving element disposed to contact with said cover in the longitudinal direction of said piezoelectric body.
Claim 6
Dependent Claim
100 words
A vibrator-type actuator comprising: a pillar shaped piezoelectric body having two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; a cover covering at least a part of a side surface of said piezoelectric body, said cover being made from a material having high wear resistant and large hat conductive characteristics; and a moving element disposed to contact with said cover in the longitudinal direction of said piezoelectric body.
Claim 7
Dependent Claim
25 words
A vibrator-type actuator as set forth in claim 4, said moving element being rotated by vibration displacement caused on the side surface of said cover.
Claim 8
Dependent Claim
26 words
A vibrator-type actuator as set forth in claim 4, said moving element being linearly moved by vibration displacement caused on the side surface of said cover.
Claim 9
Dependent Claim
25 words
A vibrator-type actuator as set forth in claim 4, further comprising pressing means for pressing said moving element against the side surface of said cover.
Claim 10
Dependent Claim
107 words
A vibrator-type actuator comprising: a pillar shaped piezoelectric body having two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; and a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics, said cover being secured to supporting means at a portion of the side surface of said cover where a small vibration displacement is caused.
Claim 11
Dependent Claim
107 words
A vibrator-type actuator comprising: a pillar shaped piezoelectric body having two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; and a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics, said cover being secured to supporting means at a portion of the side surface of said cover where a small vibration displacement is caused.
Claim 12
Dependent Claim
26 words
A vibrator-type actuator as set forth in claim 8, said cover and said supporting means being made of metal materials and being welded to each other.
Claim 13
Dependent Claim
20 words
A vibrator-type actuator as set forth is claim 8, said cover including a projection portion secured by said supporting means.
Claim 14
Dependent Claim
65 words
A piezoelectric vibrator comprising: a rectangular pillar shaped piezoelectric body polarized in a longitudinal direction; and two electrodes each one formed on a part of respective opposite end surfaces of said piezoelectric body, said electrodes on both end surfaces being formed symmetrically with respect to a central point of said piezoelectric body and asymmetrically with respect to a plane essentially perpendicular to said longitudinal direction.
Claim 15
Dependent Claim
65 words
A piezoelectric vibrator comprising: a rectangular pillar shaped piezoelectric body polarized in a longitudinal direction; and two electrodes each one formed on a part of respective opposite end surfaces of said piezoelectric body, said electrodes on both end surfaces being formed symmetrically with respect to a central point of said piezoelectric body and asymmetrically with respect to a plane essentially perpendicular to said longitudinal direction.
Claim 16
Dependent Claim
30 words
A piezoelectric vibrator as set forth in claim 11, said electrodes being formed on both end surfaces being in symmetry with respect to a center position of said piezoelectric body.
Claim 17
Dependent Claim
17 words
A piezoelectric vibrator as set forth in claim 11, said rectangular pillar shape being a square shape.
Claim 18
Dependent Claim
26 words
A piezoelectric vibrator as set forth in claim 11, a ratio of the height and width of said rectangular pillar shaped piezoelectric body being about 0.73.
Claim 19
Dependent Claim
42 words
A piezoelectric vibrator as set forth in claim 11, further comprising a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics.
Claim 20
Dependent Claim
96 words
A piezoelectric vibrator comprising: a cylindrical piezoelectric body having a flat side surface along the longitudinal direction of said cylindrical piezoelectric body and two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; and a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics.
Claim 21
Dependent Claim
96 words
A piezoelectric vibrator comprising: a cylindrical piezoelectric body having a flat side surface along the longitudinal direction of said cylindrical piezoelectric body and two end surfaces essentially perpendicular to a polarization axis of said piezoelectric body; a first electrode formed completely on one end surface of said piezoelectric body; a second electrode formed nearly completely on the other end surface of said piezoelectric body; and a cover covering at least a part of a side surface of said piezoelectric body, said cover being formed from a material having high wear resistant and large heat conductivity characteristics.
References Cited (Backward Citations)
US5008581A
Cited
US4999536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |