Piezoelectric bimorph type actuator
US5382864A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1993 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Feb 8, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2042
Abstract
A piezoelectric bimorph type actuator which, given a constant applied voltage, is capable of greater displacement without suffering from the problem of generating a smaller force of displacement or increasing the actuator size. The piezoelectric bimorph type actuator which is cantilevered, includes an electrode plate, a pair of piezoelectric plates provided on both sides of the electrode plate, and a voltage source for applying a voltage between each piezoelectric plate and the electrode plate so as to displace a free end thereof, wherein a ratio t.sub.2 /t.sub.1 between the thickness t.sub.2 of the electrode plate and the thickness t.sub.1 of each piezoelectric plate is set to be 0.42-1.11 times as much as a ratio E.sub.2 /E.sub.1 between the Young's modulus E.sub.2 of the electrode plate and the Young's modulus E.sub.1 of each piezoelectric plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.