IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0711249
(1996-09-10)
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발명자
/ 주소 |
- Lazarus Kenneth B. (Boston MA) Lundstrom Mark E. (Cambridge MA) Moore Jeffrey W. (Concord MA) Crawley Edward F. (Cambridge MA)
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| 출원인 / 주소 |
- Active Control Experts, Inc. (Cambridge MA 02)
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| 인용정보 |
피인용 횟수 :
57 인용 특허 :
0 |
초록
▼
A modular actuator assembly includes one or more plates or elements of electro-active material bonded to an electroded sheet, preferably by a structural polymer to form a card. The card is sealed, and may itself constitute a practical device, such as a vane, shaker, stirrer, lever, pusher or sonicat
A modular actuator assembly includes one or more plates or elements of electro-active material bonded to an electroded sheet, preferably by a structural polymer to form a card. The card is sealed, and may itself constitute a practical device, such as a vane, shaker, stirrer, lever, pusher or sonicator for direct contact with a solid or immersion in a fluid, or may be bonded by a stiff adhesive to make a surface-to-surface mechanical coupling with a solid workpiece, device, substrate, machine or sample. The structural polymer provides a bending stiffness such that the thin plate does not deform to its breaking point, and a mechanical stiffness such that shear forces are efficiently coupled from the plate to the workpiece. In further embodiments, the card may include active circuit elements for switching, powering or processing signals, and/or passive circuit elements for filtering, matching or damping signals, so that few or no connections to outside circuitry are required. The actuator assembly can be manufactured in quantity, to provide a versatile actuator with uniform mechanical and actuation characteristics, that introduces negligible mass loading to the workpiece. The cards themselves may be arranged as independent mechanical actuators, rather than strain-transfer actuators, in which the induced strain changes the position of the card. Various arrangements of pinned or cantilevered cards may act as a pusher, bender or other motive actuator, and structures such as powered bellows may be formed directly by folding one or more suitably patterned cards.
대표청구항
▼
A piezoceramic package comprising a plurality of layers laminated about a sheet of piezoceramic material, and including said sheet of piezoceramic material having a first surface and a second surface opposite to said first surface a flexible circuit, covering all of an active surface selected from a
A piezoceramic package comprising a plurality of layers laminated about a sheet of piezoceramic material, and including said sheet of piezoceramic material having a first surface and a second surface opposite to said first surface a flexible circuit, covering all of an active surface selected from among said first surface and said second surface of said piezoceramic material, the flexible circuit including a non-conductive polymer film layer and a conductive lead layer, said polymer film layer having a first surface attached to said conductive lead layer and a second surface opposite to said first surface and said lead layer including at pattern of lead segments extending in a path across said film layer and protruding thereabove, a bonding layer of curable material bonding said flexible circuit to said active surface of said sheet such that said sheet of piezoceramic material is strengthened and protected by said bonding layer, and said bonding layer together with said flexible circuit forms a protective skin covering said active surface of said piezoceramic sheet, said lead segments of said lead layer protruding into said bonding layer and contacting said active surface of said piezoceramic material through microvoids created in said bonding layer under said lead segments to establish direct electrical contact with said active surface while being bonded thereto, and said curable material of said bonding layer filling between said lead segments of said lead layer to firmly bond the first side of said polymer film layer to said active surface of said sheet of piezoceramic material such that in-plane strain in said sheet of piezoceramic material is effectively shear coupled between said piezoceramic material and said second surface of said polymer film layer.
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