Shape memory alloy actuated HVAC outlet airflow baffle controllers
US8876579B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 5, 2011 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Jan 3, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H2001/3471
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A baffle controller for moving a baffle disposed within an HVAC outlet housing between an open position and a closed position to control airflow through an HVAC outlet in a vehicle includes a Shape Memory Alloy (SMA) actuator that is controlled and actuated by an electrical signal. The SMA actuator rotates a main lever that rotates a valve plate. The valve plate is attached to the baffle such that the baffle rotates with the valve plate. The baffle controller may include a position biasing device that increases a position holding ability of the baffle controller, and a cut-off switch that interrupts the electrical signal to the SMA actuator to prevent over-rotating the baffle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.