Three-point hitch having flotation
US6830110B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2004 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B63/1006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A three-point hitch suitable for operation with wide implements is constructed by substituting a pair of flotation actuators for the usual drop links that are normally coupled between a pair of rocker arms and a pair of lower draft links. These drop links are coupled to a hydraulic circuit including, according to one embodiment, individual accumulators for each flotation actuator, and according to a second embodiment, both actuators are coupled to a single accumulator. The accumulator(s) act to cause a pre-selected lifting force to be exerted by the flotation actuators so that a predetermined amount of the weight of an implement mounted to the draft links is counterbalanced, leaving a desired ground pressure being exerted by the implement during operation. When using individual accumulators, a side-to-side weight balance can be achieved since different accumulator settings may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.