Hydraulic lock for a flexible tool bar
US4825958A · kind A · utility
Inventor
Key dates
| Filing date | Jan 29, 1988 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Jan 29, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B73/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A flexible tool bar apparatus including a first tool bar adapted to have earth working implements attached thereto and a second tool bar also adapted to have earth working implements attached thereto. Two tool bars are pivotally attached at the inner ends thereof. A hydraulic cylinder mechanism is operatively attached at one end thereof to the first tool bar and is operatively attached at the other end thereof to the second tool bar. A fluid device is provided for selectively supplying fluid under pressure to a hydraulic cylinder mechanism for causing the hydraulic cylinder mechanism to hold the tool bar from flexing. The tool bar can flex when the fluid pressure is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.