Vibratory screed including a spreading device for leveling and distributing plastic concrete in front of the screed
US4466757A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1983 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Jan 13, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/405
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A vibratory concrete screed includes a frame having first and second ends and a length equal to or greater than the width of plastic concrete to be finished. A screed blade is coupled to the screed frame and engages the full width of the plastic concrete. Vibration generating structure is coupled to the screed for vibrating the screed blade. A concrete spreading device is coupled to the screed frame to level the surface of the plastic concrete and to evenly distribute excess plastic concrete in front of the screed blade. The concrete spreading device includes a grading device having either an auger or a grading blade or both an auger and a grading blade. A carriage maintains the grading device at a desired relative elevation to the screed blade and translates the grading device back and forth along the length of the screed frame. The side to side translation of the grading device along the screed frame laterally distributes the excess concrete and displaces the concrete forward and away from the screed blade. Forward translation of the screed along the concrete forms together with the side to side translations of the carriage along the length of the screed frame levels and finishes…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.