Agricultural implements
US4291638A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Aug 28, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B63/32
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides in an agricultural ground treating device particularly but not exclusively a seed drill arranged to be towed over the ground and having a plurality of ground engaging implements, means for causing all of the implements to engage the ground with a substantially equal force. Preferably the means to equalizing the forces comprises a pivotal beam arrangement in which the implements are movably mounted on the chassis of the device and connected in pairs at each end of an associated balance beam, these balance beams are pivotally mounted at their mid points on respective ends of further balance beams which are mounted by their mid points at respective ends of yet further balance beams, and so on according to the number of implements on the device, the final balance beam or final pair of balance beams being connected to means on the chassis of the device for urging them, and the implements connected thereto towards the ground. Preferably the loading means is further arranged to raise the implements clear of the ground when required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.