Hydraulic suspension for harvesting machines
US4247126A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1979 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Sep 27, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G17/01925
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A generally rectangular frame having a vertical support column at each corner thereof mounted for vertical movement relative to the frame. Four hydraulic rams, all of the same diameter and one for each support columns, are used are used to connect the frame to the columns, with the two rams at one end causng raising or lowering of the frames by contraction or extension of the rams while corresponding movement of the other end of the frame is caused by opposite movement of the rams thereat. A hydraulic control system selectively: raises or lowers the frame relative to all four columns, raises or lowers the frame relative to one side only of the frame, or or raises one side of the frame while lowering the other. Additionally, the system allows the columns at one end of the frame to move freely, in equal and opposite directions relative to the frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.