Shape memory alloy actuators and control methods
US6574958B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Aug 11, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG12B1/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This invention provides stroke-multiplying shape memory alloy actuators and other actuators using electromechanically active materials [collectively referred to in this application as SMA actuators] providing stroke multiplication without significant force reduction, that are readily miniaturizable and fast acting, and their design and use; economical and efficient control and sensing mechanisms for shape memory alloy actuators (including conventional shape memory alloy actuators as well as the stroke-multiplying SMA actuators of this invention) for low power consumption, resistance/obstacle/load sensing, and accurate positional control; and devices containing these actuators and control and sensing mechanisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.