Steering valve with closed center
US6016837A · kind A · utility
0Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Nov 6, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86662
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In order to reduce the number of components required and increase the service life by preventing friction resulting from large-diameter seals, a steering valve (1) is provided which has a closed center for supplying hydraulic pressure to an actuator and which comprises an input shaft (2), an output shaft (3), a torsionally resilient element (11) which is connected at one end to the input shaft (2) and at the other end to the output shaft (3), a control pressure switching arrangement (4), and an axial force conversion unit (19-23), wherein at least one hydraulic line (15) guides reaction pressure in the input shaft (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.