Seed and fertilizer drill with spring loaded coulters counter-mounted on vertically adjustable beam
US4149475A · kind A · utility
81Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1978 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Mar 16, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S111/927
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Seed drill has a row of coulters which are raised and lowered by a beam positioned above the coulters and connected to the coulters by spring assemblies. The beam is journalled for pivotal movement about its longitudinal axis and the spring assemblies are connected to the beam so that some exert reaction forces on the beam having clockwise moments about the beam's pivot axis, and others anticlockwise moments, whereby changes in loading of the coulters can be distributed between the coulters by angular movement of the beam about its pivot axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.