Cushion mounted disc with interconnecting spool assembly
US4577699A · kind A · utility
Inventor
Key dates
| Filing date | Mar 13, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Mar 13, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B61/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a disc harrow implement, each of a plurality of disc blades is provided with a conical hub having a center aperture through which an arbor bolt is inserted along the length of the implement. First and second sections of a spool, or hub, positioned on the arbor bolt include respective facing, complementary, conical end portions positioned immediately adjacent opposite faces of the conical hub of the disc. The end portion of the first spool section is provided with a plurality of spool spacer pins around the periphery thereof. Similarly, the hub portion of the disc is provided with a plurality of peripheral apertures around the center aperture through which the spacer pins are inserted so as to abut the end portion of the second spool section when the disc is positioned between the respective spool sections. First and second resilient spacer members are respectively positioned between the respective conical portions of the disc and the first and second spool sections. The interconnecting spool assembly substantially increases the axial strength of the disc harrow and permits the disc blade to flex laterally and vertically relative to its axial support members. Each of the first an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.