Control device for three-point hitch
US4268057A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Sep 21, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B59/041
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sway limiting apparatus is disclosed for three-point hitches which has both sway and non-sway settings to either permit limited lateral movement of the draft arms or maintain a constant dimension between the draft arms while the hitch is being lowered or raised. The sway limiting apparatus includes a contoured sliding block which abuts and slides on a complementary bar bracket adjustably mounted to the tractor frame. The sliding block is slotted for adjustment fore and aft along the draft arm, and it includes both inclined surface portions and a tapered surface portion. In the non-sway setting, the inclined surface portions of the sliding block bear against the bar bracket to restrict any side sway while the hitch is being raised or lowered and to maintain the distance between the hitch connection points at a constant dimension. The bar bracket is selectively moved to a second position for the sway setting wherein the tapered surface portion of the sliding block bears against the bar bracket when controlled or restricted sway movement is desirable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.