Tillage and seeding implement with trailing opener and press wheel gangs
US4528920A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1983 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Oct 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S111/926
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disk openers and corresponding pivoting press wheels are mounted in gangs on the rear frame portion of a tillage implement such as a field cultivator. Individual press wheel gangs are pivotally connected to the frame by standards which are biased downwardly by spring bracket assemblies. Each gang of openers is connected to the corresponding press wheel drawbars rearwardly of the pivot so that the pivot center of each opener is dependent on press wheel position. Opener down pressure springs act through an effective moment arm which decreases as the press wheel gang pivots upwardly to provide uniform opener depth penetration on uneven ground such as where terraces exist. An air distribution system delivers seed from a tank mounted on the cultivator to the disk openers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.