Soil spreading scraper device including deflecting paddles
US10358790B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2016 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Apr 14, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/656
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A soil spreading scraper device has a cutting blade to cut soil from the ground and a rotating impeller member for spreading the cut soil as the frame is displaced forwardly. The impeller member includes a main disc body and a plurality of impeller blades on the main disc body which are pivotal relative to the body between a working position in which the blade body extends in a direction of the impeller axis away from the main disc body and a deflected position in which the blade body extends in a circumferential direction of the disc body in a trailing relationship relative to the pivot axis of the blade body. An actuating assembly resists displacement of the blade body into the deflected position until pressure on the paddle exceeds a prescribed holding force. A spring biases the body to return to the working position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.