Hybrid exhaust valve assembly
US7401592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2007 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Apr 2, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/041
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An exhaust valve assembly includes a flapper valve fixed to a valve shaft where the flapper valve is movable between a closed position, an intermediate position, and an open position. A resilient member biases the flapper valve toward the closed position. An electric actuator actively moves the flapper valve at least from the closed position to the intermediate position. A coupling mechanism couples the valve shaft to an electric actuator shaft and allows the flapper valve to move to the open position in response to exhaust flow sufficient to overcome a biasing force of the resilient member without requiring input from the electric actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.