Road structure – process – or apparatus – Apparatus – With means for profile shaping – e.g. – crown
Patent
1984-10-22
1986-12-23
Novosad, Stephen J.
Road structure, process, or apparatus
Apparatus
With means for profile shaping, e.g., crown
404119, 37108A, 1727013, E01C 1915
Patent
active
046309640
ABSTRACT:
A subgrading machine precisely levels and contours the subgrade within an area having first and second parallel oriented forms including parallel upper surfaces vertically spaced above the subgrade and defining a form surface plane. A grading blade extends along the front of a triangular truss frame terminated by first and second end sections and having a length less than the spacing between the forms. The front and rear edges of the frame define a frame base plane. An adjustable end bracket is coupled to each frame end section and includes a form contact element for maintaining a parallel alignment between the frame base plane and the form surface plane. The form contact element is coupled at a selectable vertical position to each end bracket to vary the spacing between the frame base plane and the form surface plane to thereby determine the grading depth of the grading blade. A winch system provides a traction force having an effective horizontal force vector at approximately the same elevation as the grading blade and the subgrade.
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patent: 985214 (1911-02-01), Shroyer
patent: 1532841 (1925-04-01), Stayton et al.
patent: 1768663 (1930-07-01), Carr
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patent: 3680451 (1972-08-01), Birtchet
patent: 4249327 (1981-02-01), Allen
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patent: 4314773 (1982-02-01), Allen
patent: 4316715 (1982-02-01), Allen
patent: 4335976 (1982-06-01), Morrison
patent: 4412803 (1983-11-01), Allen
patent: 4544346 (1985-10-01), Allen
Allen Engineering Corporation
Letchford John F.
Novosad Stephen J.
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