Screed assembly with improved sensitivity and response to varying surface conditions
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United States of America Patent
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Apr 8, 2003
Grant Date -
Oct 3, 2002
app pub date -
Mar 29, 2001
filing date -
Mar 29, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A screed assembly for use with a prime mover adapted to be moved over a surface to distribute material on the surface. The assembly comprises a prime mover, a screed platform having a screed plate forming a bottom surface thereof and first and second sets of tow arms operably coupled between the prime mover and the screed platform. The tow arms of each set are pivotally coupled with the prime mover and the screed platform and the pivotal coupling of one arm is vertically spaced from the pivotal coupling of the other arm of the same set. Depending upon the dynamics of the paving operation being performed, the tow arms of each set may be in a crossed or a non-crossed orientation to provide positive control of the angle of attack of the screed plate 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.
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