Tow-behind grading tool and operation thereof
US10039222B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2016 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Jan 13, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/7663
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
One embodiment is a tow-behind grading tool structured for attachment to a work machine. The tool includes a frame, ground contacting members rotatably coupled with the frame, a comb coupled with the frame and extending from a first end of the frame, a tow coupling member coupled with the frame and located proximate a second end of the frame, the second end of the frame being opposite the first end of the frame, a drag bar assembly including a plurality of arms rotatably coupled with the frame and drag bar rotatably coupled with the plurality of arms, and at least one spring coupled with the frame and the drag bar assembly such that the spring resists upward rotation of the drag bar and provides force urging the drag bar to rotate downward after upward rotation of the drag bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.