Shape memory alloy based linear actuator assembly
US9267494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2012 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03G7/066
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A linear motion device includes a rod extending along a longitudinal axis, and a plurality of actuator units. Each of the plurality of actuator units includes at least one Shape Memory Alloy (SMA) element that is attached to a coupling mechanism. The at least one SMA element of each if the plurality of actuator units moves the coupling mechanism along the longitudinal axis, and into grasping engagement with the rod. Each actuator unit moves the rod a unit movement distance along the longitudinal axis in response to a control signal. The plurality of actuator units are actuated repeatedly in a cyclic order to move the rod in a continuous linear motion a distance greater than the unit movement distance of each of the plurality of actuator units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.