Road structure – process – or apparatus – Process – In situ treatment of earth or roadway
Reexamination Certificate
2008-08-14
2010-02-02
Addie, Raymond W (Department: 3671)
Road structure, process, or apparatus
Process
In situ treatment of earth or roadway
C404S084200, C404S118000, C299S001900
Reexamination Certificate
active
07654769
ABSTRACT:
According to a method for constructing a cover layer S on a planum M by using a paving screed B the elevation of the paving screed B above the planum M is measured using a reference RZ on the planum M by at least one elevation sensors H and/or the lateral inclination of the paving screed B with respect to the planum M is measured by at least one lateral inclination sensor N. Upon occurrence of a deviation from the target elevation pulling points P of pulling bars6of the paving screed B are displaced vertically at a road paver F by levelling cylinders Z. Each levelling cylinder Z is exclusively adjusted over an absolute stroke starting from a selected zero point NP. The absolute stroke is calculated from a measuring result of a reference measurement and by consideration of a construction ratio factor. A new adjustment position of the levelling cylinder Z resulting from the adjustment over the absolute stroke in a self-learning fashion automatically is selected as the new zero point NP for a subsequent regulation cycle.
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Addie Raymond W
Darby & Darby P.C.
Joseph Voegele AG
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