Piezoelectric actuator
US4958101A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Jul 28, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/886
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piezoactuator comprising a housing having a piston bore formed therein. The tip portion of a piston is slidably inserted into the cylinder bore and defines a variable volume chamber therein, and a piezoelectric element is supported between the piston and the housing. A hollow cylindrical resilient member is fitted onto the outer wall of the piston and inserted between the piston and the housing to apply a compression load to the piezoelectric element via the piston. The hollow cylindrical resilient member has a plurality of circumferentially extending slots arranged in a point of symmetry about the axis of the hollow cylindrical resilient member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.