Grade averaging apparatus
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United States of America Patent
Stats
-
Jul 22, 1980
Issued Date -
N/A
app pub date -
Sep 28, 1978
filing date -
Sep 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved portable grade averaging apparatus comprising an averaging bar assembly that serves as an elevation control reference for a track supported road working machine. One end of an averaging bar member is pivotally supported by a forward steering drive track assembly that serves as a forward walking beam, and the other end of the averaging bar member is pivotally supported by a rear track assembly that serves as a rear walking beam. A grade sensor assembly supported on one side by the road working machine contactingly engages the averaging bar member for directing the elevation of one side of the road working machine to establish the elevation of a working tool supported by the road working machine.
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