Road structure – process – or apparatus – Apparatus – Automatic control
Reexamination Certificate
2006-09-19
2006-09-19
Addie, Raymond W. (Department: 3671)
Road structure, process, or apparatus
Apparatus
Automatic control
C404S084050, C404S084100, C404S084800, C404S092000, C404S101000, C404S108000, C404S110000, C404S115000, C404S118000
Reexamination Certificate
active
07108450
ABSTRACT:
A drag box for use in applying cold mix asphalt paving material to a surface includes a pugmill for distributing the cold mix over the surface, a strike blade for shearing the asphalt mixture to a desired thickness, cylinders for raising and lowering the strike blade in response to elevational changes in the surface, at least one signal generator associated with each cylinder and adapted to produce a signal indicative of the elevation of the surface, and at least one signal receiver associated with each signal generator. The drag box is pulled behind a prime mover but preferably is not rigidly coupled with the prime mover. The blade is raised and lowered in response to signals emanating from the generator as the elevation of the surface changes, allowing surface level variations to be evened out while paving.
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Addie Raymond W.
SemMaterials, L.P.
Stinson Morrison & Hecker LLP
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