Subsurface root crop harvesting blade assembly
US3993140A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | May 27, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D21/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved blade assembly for moving beneath the surface of the ground to engage and lift a subsurface root crop upwardly and rearwardly when moved along a forward path by a harvesting implement. The assembly includes an elongated blade that is held transverse to the forward direction of harvester travel. The blade is mounted to a framework for oscillational movement about a first horizontal axis and a second axis perpendicular to the horizontal axis. A power source operates the blade to oscillate about these axes in continuous cycles. Each cycle of blade movement includes a forward and downward stroke and an upward and rearward stroke. This movement occurs rearward of and below the horizontal pivot axis for the blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.