Grading tool compatible with light duty work machine
US10501912B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2017 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Mar 23, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/8157
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A grading tool comprises a frame extending between a hitch and a ground contacting member. A first adjustment mechanism and a lever are coupled with the frame. A suspension assembly including a spring is coupled with the lever. A grading box assembly is coupled with the frame and with the suspension assembly. The spring is compressible to accommodate motion between the lever and the grading box assembly. A second adjustment mechanism is coupled with the frame and the grading box assembly and is adjustable to selectably increase and decrease in length. A fixation member is coupled with the grading box assembly and is selectably coupleable with the frame to fix a first side of the grading box assembly vertically relative to the frame while allowing vertical movement of a second side of the of the grading box assembly relative to the frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.