Hydraulic control device for at least one lifting valve
US6167853A · kind A · utility
10Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2000 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Mar 22, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L9/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a hydraulic control device for a lifting valve, the said device comprising a valve stem capable of being moved by two spring means acting in opposition to one another, the valve stem being capable of being activated hydraulically in the region of its end positions. According to the invention, the hydraulic control device contains a hydraulically regulatable spring means which is assigned a hydraulically acting auxiliary control member, by means of which the working fluid of the hydraulically regulatable spring means can be relieved of pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.