Variable timing valves for gas compressors and expanders
US6443717B1 · kind B1 · utility
13Cited by
8References
18Claims
0Family size
Inventor
Key dates
| Filing date | Oct 12, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Oct 12, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/22
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Variable valve timing is provided to control compressors and expanders in a fuel cell powering system in order to provide for matching the displaced volume of the compressor and expander over a range of pressure delivery requirements. A movable timing edge is positioned adjacent inlet and/or discharge ports to cooperate with a movable valve element with inlet and outlet slots to adjust the time and time period of open and close operations. Several embodiments are presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.