Actuator
US8419345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Jun 14, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D17/26
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In one embodiment a system is disclosed that includes an actuation device coupled with a turbomachinery mechanism. The actuation device can include multiple fluid pathways and a valve to alternatively place each of these pathways in fluid communication with a supply port while another of the pathways is in fluid communication with a return port to selectively move an actuation member along a range of travel. A brake valve may also be included to provide pressurized fluid to the actuation member when the actuation device is in an on condition and divert at least a portion of the pressurized fluid away from the actuation member through another pathway when the actuation device is in an off condition. A fluid-powered brake is coupled to this further pathway to selectively apply braking force to the actuation member in response to the diverted pressurized fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.