Earth working apparatus
US4131162A · kind A · utility
Inventor
Key dates
| Filing date | Dec 11, 1975 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Dec 11, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B13/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An earth working apparatus comprising a main frame having a hitch for detachably connecting the apparatus to a prime mover, a first ground working implement mounted on the main frame, a pair of support arms operatively connected at forwardly disposed ends thereof to the main frame for pivotal movement about a first transverse axis, ground engaging wheels mounted on the support arm, a lift arm operatively connected to each of the support arms for pivotal movement about a second transverse axis, a second earthworking implement mounted on the lift arms, chains interconnecting each of the lift arms and the main frame, a ground engaging wheel mounted on one of the frames and hydraulic cylinders operatively interconnecting each of the support arms and the main frame for angularly displacing the support arms relative to the main frame whereby upon actuation of the hydraulic cylinders when the ground engaging wheel is not in engagement with the ground, the working implements will be caused to move into and out of engagement with the ground, and upon actuation of the hydraulic cylinders when the wheel is in engagement with the ground, which will be caused to move substantially vertically to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.