Control valve assembly for pumps and injectors
US6158419A · kind A · utility
8Cited by
77References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Mar 10, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/466
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Pumps and injectors utilize a control valve having a valve body with a valve stem having a step adjacent to the seating surface. The step extends a limited distance away from the seating surface to provide limited pressure relief when the valve body is at an intermediate position that is between the opened and closed positions. Step cross-section and axial length may be configured based on desired hydraulic behavior. In a preferred embodiment, the control valve step is configured for injection rate shaping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.