Patent US5159225A successfully refreshed from Google Patents.
US5159225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric actuator
Assignee: Aura Systems Inc
•
Filing: 1991-10-18
•
Granted: 1992-10-27
•
Expires: 2011-10-18
Abstract
Abstract A piezoelectric actuator includes a pair of piezoelectric members which are oriented to shear laterally toward each other in the presence of an applied voltage. A hinge having translational members (which act similarly to a rack) and a rotating member (which acts similarly to a pinion) is attached to the top of the piezoelectric members with one translational attached to a respective one of the piezoelectric members. A driven member attached radially outward from the rotating member will then move through an arc when the piezoelectric members laterally shear. An object, such as a mirror, when carried by the distal end of the driven member, will then be actuated.
Inventors
- 👤 Gregory Um
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:05
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; G; G02; G02B; G02B26/00; G02B26/08; G02B26/0816; G02B26/0833; G02B26/0858; G02B7/00; G02B7/18; G02B7/182; G02B7/1822; G02B7/1827; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/372; H02; H02N; H02N2/00; H02N2/02; H02N2/04; H02N2/043; H02N2/046; H02N2/10; H10N30/01; H10N30/07; H10N30/072; H10N30/073; H10N30/20; H10N30/208; H10N30/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
312 words
An apparatus for tilting the plane of an object comprising: a substrate; a pair of spaced apart piezoelectric members, each of said members having a top surface, a bottom surface, a first side surface and a second side surface, said bottom surface being mounted to said substrate, said members further having a polarization selected so that a voltage applied between said first side surface and said second side surface thereof causes said top surface to laterally shear in a direction determined by the polarity of said applied voltage, said first side surface of each of said members being in a facing relationship so that said applied voltage at each of said members causes said top surface of each of said members to shear toward each other when said voltage has a first polarity and to shear away from each other when said voltage has a second polarity opposite said first polarity; and a hinge having a pair of mounting members, a pair of translational members, a rotating member, and a driven member, each of said mounting members being mounted to said top surface of a respective one of said piezoelectric members, said rotating member being disposed between said mounting members and attached thereto by said translational members wherein a first one of said translational members extends from a first one of said mounting members to an upper portion of said rotating member and a second one of said translational members extends from a second one of said mounting members to a lower portion of said rotating member, said driven member being attached to said rotating member and extended radially outward from an axis of rotation thereof, said driven member further including a platform to which said object is mounted, whereby shearing of said piezoelectric members imparts a tilting motion to said object when carried by a distal end of said driven member.
Claim 2
Independent Claim
312 words
An apparatus for tilting the plane of an object comprising: a substrate; a pair of spaced apart piezoelectric members, each of said members having a top surface, a bottom surface, a first side surface and a second side surface, said bottom surface being mounted to said substrate, said members further having a polarization selected so that a voltage applied between said first side surface and said second side surface thereof causes said top surface to laterally shear in a direction determined by the polarity of said applied voltage, said first side surface of each of said members being in a facing relationship so that said applied voltage at each of said members causes said top surface of each of said members to shear toward each other when said voltage has a first polarity and to shear away from each other when said voltage has a second polarity opposite said first polarity; and a hinge having a pair of mounting members, a pair of translational members, a rotating member, and a driven member, each of said mounting members being mounted to said top surface of a respective one of said piezoelectric members, said rotating member being disposed between said mounting members and attached thereto by said translational members wherein a first one of said translational members extends from a first one of said mounting members to an upper portion of said rotating member and a second one of said translational members extends from a second one of said mounting members to a lower portion of said rotating member, said driven member being attached to said rotating member and extended radially outward from an axis of rotation thereof, said driven member further including a platform to which said object is mounted, whereby shearing of said piezoelectric members imparts a tilting motion to said object when carried by a distal end of said driven member.
Claim 3
Dependent Claim
14 words
An apparatus as set forth in claim 1 wherein said platform is substantially planar.
Claim 4
Dependent Claim
21 words
An apparatus as set forth in claim 2 wherein said platform is normal to the radius of said axis of rotation.
Claim 5
Dependent Claim
30 words
An apparatus as set forth in claim 1 wherein said first side surface has a first metalization applied thereto and said second side surface has a second metalization applied thereto.
Claim 6
Dependent Claim
388 words
An actuated mirror array for tilting the plane of mirror in such array comprising: a substrate having a plurality of openings therethrough; a plurality of pairs of spaced apart piezoelectric members, each of said pairs being disposed proximate a respective one of said openings, each of said members having a top surface, a bottom surface, a first side surface and a second side surface, said bottom surface being mounted to said substrate, said members further having a polarization selected so that a voltage applied between said first side surface and said second side surface thereof causes said top surface to laterally shear in a direction determined by the polarity of said applied voltage, said first side surface of each of said members of each of said pairs being in a facing relationship so that said applied voltage at each of said members of said pairs causes said top surface of each of said members in each of said pairs to shear toward each other when said voltage has a first polarity and to shear away from each other when said voltage has a second polarity opposite said first polarity, said first side surface of each of said members in each of said pairs being addressable through one of said openings proximate thereto, said second side surface of all of said members being electrically coupled in common; a plurality of hinges associated with each of said pairs, each of said hinges having a pair of mounting members, a pair of translational members, a rotating member, and a driven member, each of said mounting members being mounted to said top surface of a respective one of said piezoelectric members, said rotating member being disposed between said mounting members and attached thereto by said translational members wherein a first one of said translational members extends from a first one of said mounting members to an upper portion of said rotating member and a second one of said translational members extends form a second one of said mounting members to a lower portion of said rotating member, said driven member being attached to said rotating member and extended radially outward from an axis of rotation thereof, whereby shearing of said piezoelectric members in each pair imparts a tilting motion to each mirror when carried by a distal end of said driven member.
Claim 7
Dependent Claim
388 words
An actuated mirror array for tilting the plane of mirror in such array comprising: a substrate having a plurality of openings therethrough; a plurality of pairs of spaced apart piezoelectric members, each of said pairs being disposed proximate a respective one of said openings, each of said members having a top surface, a bottom surface, a first side surface and a second side surface, said bottom surface being mounted to said substrate, said members further having a polarization selected so that a voltage applied between said first side surface and said second side surface thereof causes said top surface to laterally shear in a direction determined by the polarity of said applied voltage, said first side surface of each of said members of each of said pairs being in a facing relationship so that said applied voltage at each of said members of said pairs causes said top surface of each of said members in each of said pairs to shear toward each other when said voltage has a first polarity and to shear away from each other when said voltage has a second polarity opposite said first polarity, said first side surface of each of said members in each of said pairs being addressable through one of said openings proximate thereto, said second side surface of all of said members being electrically coupled in common; a plurality of hinges associated with each of said pairs, each of said hinges having a pair of mounting members, a pair of translational members, a rotating member, and a driven member, each of said mounting members being mounted to said top surface of a respective one of said piezoelectric members, said rotating member being disposed between said mounting members and attached thereto by said translational members wherein a first one of said translational members extends from a first one of said mounting members to an upper portion of said rotating member and a second one of said translational members extends form a second one of said mounting members to a lower portion of said rotating member, said driven member being attached to said rotating member and extended radially outward from an axis of rotation thereof, whereby shearing of said piezoelectric members in each pair imparts a tilting motion to each mirror when carried by a distal end of said driven member.
Claim 8
Dependent Claim
22 words
An apparatus as set forth in claim 5 wherein said driven member has a planar platform to which one mirror is mounted.
Claim 9
Dependent Claim
21 words
An apparatus as set forth in claim 6 wherein said platform is normal to the radius of said axis of rotation.
Claim 10
Dependent Claim
85 words
An apparatus as set forth in claim 5 wherein said first side surface of each of said members for each of said pairs has a first metalization applied thereto and one of said openings proximate thereto has a metal therein in electrical contact with said first metalization so that each of said pairs may be addresses, and further wherein said second side surface of all of said members has a second metalization applied thereto and connected in common on the top surface of said substrate.
References Cited (Backward Citations)
US3510571A
Cited
US3507984A
Cited
US3748504A
Cited
US3760096A
Cited
US4441791A
Cited
US4571603A
Cited
US4680579A
Cited
US4638309A
Cited
US4633118A
Cited
US4553061A
Cited
US4566935A
Cited
US4710732A
Cited
US4615595A
Cited
US4705361A
Cited
US4859012A
Cited
US4736132A
Cited
US4956619A
Cited
US4856863A
Cited
US4944580A
Cited
US5028939A
Cited
US4933592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |