Valve
US6799599B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2003 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Apr 27, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7792
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a valve that comprises at least one pump connection (10), one tank connection (14) and one consumer connection (18), and a valve piston (22) that is displaced within the valve box (12). Said valve piston separates the pump connection (10) from the tank connection (14) in at least one blocked position and interacts with an energy accumulator (24). A fluid stream that flows between the consumer connection (18) and the tank connection (14) is controlled by means of a control device (26). The control device (26) is configured as a fluid stream control that is integrated in the valve piston (22) and that allows, contrary to known valves which use a diaphragm construction, reduction, by a constant value, of the volume flow to the consumer in a load-independent manner, thereby allowing for a proportional load-independent control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.