Three-point suspension for bituminous pavers
US4801218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jan 20, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2300/09
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved "3-point" suspension for a bituminous paver disposes two of the suspension "points" at the front of the tractor unit and the third "point" at the rear. Preferably the third suspension "point" is achieved by suspending the rear of the tractor unit via laterally spaced hydraulic cylinders interconnected such that upward or downward movement of one rear wheel or track results in corresponding downward or upward movement of the other rear wheel or track. The hydraulic suspension also allows the height of the rear of the tractor unit, and thus the height of the spreader screws relative to the ground, to be adjusted on the run by conjoint upward or downward movement of both rear wheels or tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.