Directional control valve
US4254798A · kind A · utility
2Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1979 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Jan 9, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86702
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The direction control valve comprises a housing having a stepped central boring for accommodating a sliding control piston having a section of larger diameter and a section of smaller diameter. The housing defines two load ports each communicating with an assigned boring section through an annular gap. One load port is directly connectable through its annular gap with a pressure releasing or venting port and the other load port is connectable to the same venting port through a central passage in the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.