Rotary servo valve and guidance system apparatus for controlling the same
US5524525A · kind A · utility
62Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | May 23, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86646
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A guidance control system for trailing implements attached to a tractor is disclosed. The system can function to steer the implement in a row crop, for example, and can also steer the tractor. A proportional servo valve having a rotatable spool is disclosed, which valve can be controlled to operate in an open center or closed center modes of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.