Implement with laterally movable frame structure
US4463811A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jun 21, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B69/004
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A guidance system for use with tractor-mounted row crop cultivators and similar implements includes a pair of independent furrow followers mounted one behind the other on the implement for sensing implement position relative to a preestablished guidance furrow. Series-connected switches are controlled by furrow sensor arms to activate a solenoid valve-controlled hydraulic cylinder on a laterally movable parallel linkage hitch which replaces the standard three-point hitch on the implement. When the implement is raised from the ground, V-shaped stops under the sensor arms automatically position the sensors at the null point. Switches and an actuator on the hydraulic cylinder operate in response to movement of the tractor rockshaft to return the implement to center position in preparation for alignment with the next set of rows to be cultivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.