Self-recovering grade control feeler

Details Self-recovering grade control feeler Self-recovering grade control feeler

1997-04-02

1999-03-02

Graysay, Tamara L.

Road structure, process, or apparatus

Apparatus

Automatic control

404 8405, E01C 2307

Patent

active

058761500

ABSTRACT:
A grade control feeler assembly provides a pair of spaced apart control line feelers mounted on a rotational hub such that when an obstacle such as a line stake is encountered a first feeler running in contact with the line is rotated by the obstacle. This results in the rotation, as well, of the second of the feelers into contact with the line. When the obstacle has been negotiated, a spring causes the feelers to rotate to their original positions without even a momentary loss of contact between the feeler assembly and the line.

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patent: 3890055 (1975-06-01), Rochfort
patent: 4197032 (1980-04-01), Miller
patent: 4319859 (1982-03-01), Wise
patent: 5354189 (1994-10-01), McKinnon

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