Spool and poppet inlet metering valve
US6918409B1 · kind B1 · utility
22Cited by
14References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Jan 19, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87981
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Valve structures include a combination of spool valving and poppet valving. A spool function of the structure regulates the flow of a liquid, such as the flow of fuel to a diesel engine. A poppet function provides a low leakage in the valve in a closed or cut-off state. With this combination in a valve, spool clearance can be increased reducing the cost and precision machining/assembly of the components, because the poppet to seat closure provides the sealing function at cut-off. Included are an air-gap flux adjustment to adjust responsiveness to control current, and a force pre-load adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.