Vehicle with hinged attachment implement
US4667744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1984 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Dec 10, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D49/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A vehicle, such as a tractor, has an attachment implement, such as a plow. An automatic controller acts upon a power lift of the plow, which moves the plow during operation in trenching position. In a first control, this motion of the plow ensues relative to the tractor, so that the vertical absolute velocity component of the plow becomes approximately zero. The plow is so moved relative to the vehicle that it moves upward during a downward motion of the plow-tractor joint and downward during an upward motion of such joint. The tractor is this completely disconnected dynamically from the plow, so that the pitching vibration behavior of the tractor is not subjected to a negative change due to the moments resulting from the forces of acceleration of the plow and affecting the plow, as is the case with a vehicle having a rigidly connected attachment implement. In a second control, the plow is moved in opposite phase to the tractor to counteract a change of its pitching angle coordinate. This results in a pitching angle behavior having an amplitude which is less than that of a tractor without an attachment implement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.