Changeover valve for controlling the throughflow of a pressure medium
US4664150A · kind A · utility
7Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1984 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Mar 20, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86895
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The valve seats and the valve stem of the changeover valve have different diameters from one another so that the pressure medium applied a drive force to actuate the valve. The control system is a simple and purely passive retention system without external drive, the retention being triggered by a pulse-like electric signal. The signal energy produced and transmitted within electronic control systems suffices to actuate the valve, no additional drives being necessary for such actuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.