Rock extractor apparatus and method
US4313502A · kind A · utility
Inventor
Key dates
| Filing date | Jan 24, 1980 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Jan 24, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B43/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a rock extractor apparatus and method of using the rock extractor for removing rocks embedded in the ground and/or for removing rocks partially embedded in the ground. The invention is particularly directed to removing rocks from soil suitable for farming. The rock extractor consists essentially of a digger unit, a grate unit and a conveyor unit, all of which cooperate to efficiently and effectively extract rocks from the soil and to render the soil suitable for cultivation. The rock extractor is attached to a draft machine such as a tractor and pulled through the soil. The tractor pulling the extractor through the soil causes rock and soil to be dug up and moved over the digger unit. The grate unit and conveyor unit cooperate to forcefully drive the conveyor unit downwardly and forwardly into the pile of rock and soil that is moved from the digger unit onto the grate unit and to rapidly move the rock and soil rearwardly along the grate unit. The conveyor unit is operably connected to the grate unit by parallel connecting lever arms which allow the conveyor unit to move vertically upwardly relative to the grate unit to accommodate the handling of la…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.