| 摘要 |
A screed assembly (10) for use with a prime mover (12) adapted to be moved over a surface (18) to distribute material on the surface. The assembly (10) of the present invention comprises a prime mover (12), a screed platform (14) having a screed plate (26) forming a bottom surface thereof and first and second sets of tow arms (16) operably coupled between the prime mover (12) and the screed platform (14). The tow arms of each set (16) are pivotally coupled with the prime mover (12) and the screed platform (14) and the pivotal coupling of one arm (22) is vertically spaced from the pivotal coupling of the other arm (24) of the same set. Depending upon the dynamics of the paving operation being performed, the tow arms of each set (16) may be in a crossed or a non-crossed orientation to provide positive control of the angle of attack of the screed plate (26) relative to the tow angle. A method of maintaining a substantially uniform depth of a material being spread over a surface by a screed is also contemplated by the invention.
|
