Reverse operating nonlinear spring
US8402951B2 · kind B2 · utility
4Cited by
13References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2010 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Feb 23, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/50
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides an apparatus for enabling operation of a piezoelectric actuator, comprising a spring configured to provide a compressive force to a piezoelectric element of a piezoelectric actuator, wherein the compressive force varies with displacement of the piezoelectric element such that the compressive force is less at a first displacement than at a second displacement, and wherein the first displacement is greater than the second displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.