Multi-stable actuation apparatus and methods for making and using the same
US8540206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2009 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Apr 12, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/002
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Actuator apparatus having a multi-stable element actuated by memory alloy actuating elements. In one embodiment, the multi-stable actuator comprises a bistable (two-state) diaphragm element adapted to alternate between two stable configurations via forces exerted on the diaphragm by more than one memory alloy filaments in response to thermal activation. In another embodiment, the bistable diaphragm of the multi-stable actuator transitions from a first to a second stable configuration via forces exerted by a single filament in response to direct or indirect thermal activation. A portion of the assembly is displaced when the assembly is in the second configuration. The bistable diaphragm transitions back to the first stable configuration via application of mechanical force on a portion of the assembly which was displaced. Methods for making and using the bistable actuator apparatus are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.