Method and apparatus for heating an asphalt paving screed

Details Method and apparatus for heating an asphalt paving screed Method and apparatus for heating an asphalt paving screed

1992-03-06

1993-11-09

Dorner, Kenneth J.

Road structure, process, or apparatus

Apparatus

With means for heating a road base, surface, or material

404118, E01C 2314, E01C 1922

Patent

active

052596931

ABSTRACT:
Heat exchange tubes are mounted on the upper face of the sole plates of the main screed and screed extenders on an asphalt paving machine. Hot oil is circulated through the heat exchange tubes to preheat the sole plates. The heating system for the oil includes a pressure drop across a flow restrictor. The heating oil is pressurized by a pump driven by a hydraulic motor supplied with pressurized oil in a second hydraulic circuit from the tractor of the paver. This second circuit is also used to operated the vibratory mechanisms on the screeds after the screeds are preheated.

REFERENCES:
patent: 3557672 (1971-01-01), Shurtz
patent: 3864858 (1975-02-01), Rochfort
patent: 3997276 (1976-12-01), Jackson, Sr.
patent: 4018540 (1977-04-01), Jackson, Sr.
patent: 4319856 (1982-03-01), Jeppson
patent: 4714374 (1987-12-01), Mihara

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