Thermally isolated actuator with temporary contacting linkage for an exhaust valve
US7581710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2006 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Mar 27, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D9/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An exhaust valve assembly includes a valve body, a valve supported by a shaft within the valve body, and an actuator that moves the valve relative to the valve body to control exhaust flow. The actuator is thermally isolated from the valve by a linkage mechanism that cooperates with exhaust flow to move the valve between open and closed positions. The actuator temporarily contacts the linkage mechanism to initiate opening and closing movement but then moves out of contact with the linkage mechanism as the exhaust flow exerts a force against the valve to move the valve to a fully open or fully closed position. This temporary contact between the linkage mechanism and the actuator reduces heat transfer from the valve to the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.