Asphalt paver with compaction compensating system

Details Asphalt paver with compaction compensating system Asphalt paver with compaction compensating system

1995-09-15

1997-02-04

Lisehora, James A.

Road structure, process, or apparatus

Apparatus

Automatic control

404 842, 404 845, E01C 1948

Patent

active

055991343

ABSTRACT:
An improved asphalt paver with a compaction compensating system includes a nominal reference, such as an elongate averaging ski, for determining the general profile of the underlying terrain on which a mat of asphalt material is being placed by the paver. The improved system also includes a compensating ski for determining localized irregularities of the subgrade and a control system for responsively altering the thickness of the mat being placed by the paver to compensate for differential compaction of the asphalt material such that a generally planar asphalt paving surface is obtained after compaction thereof. Modified embodiments of the improved compaction compensating system include a stringline for the reference and two non-contacting sensors for communicating the general profile and localized irregularity determinations to the control system.

REFERENCES:
patent: 3749504 (1973-07-01), Smith
patent: 3846035 (1974-11-01), Davin
patent: 5201604 (1993-04-01), Ferguson et al.

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