Method and apparatus for controlling the depth of an agricultural work unit mounted to a frame that can be raised and lowered by a cylinder assembly
US8235130B2 · kind B2 · utility
35Cited by
17References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2008 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Jun 5, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B63/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An agricultural implement has a depth control system in which a position sensor directly measures linear translation of a hydraulic cylinder that lifts and lowers the implement frame to set and adjust the depth of the implement frame. The position sensor may be positioned adjacent to or integrally formed with the hydraulic cylinder, and provides a voltage to a controller remote from the implement. The controller automatically adjusts the flow of hydraulic fluid to and from the hydraulic cylinder to maintain the depth of the implement frame at an operator-selected level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.