Shape memory alloy actuator
US4700541A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Oct 16, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2061/0122
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electrically controlled shape memory alloy actuator capable of being miniaturized for use in robotics and other fields. The actuator is made of a shape memory alloy wire which is torsioned end along its longitudinal axis and with its ends constrained against movement. A lever or other suitable element is attached to the wire at a desired point other than at a wire end. A plurality of electrical connections spaced along the wire define a plurality of different sections of the wire. The wire and attached control element is made to rotate by selectively applying voltages to the different sections of the wire to heat the individual sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.