Patent ID: 6125944
Filing Date: 2000-10-03
Classification: A01B

Abstract:
A telescoping field marker which is compact when retracted, comprising:a bracket structure which is attachable to an implement frame;an inner arm having a lumen, wherein said inner arm is movably attached to said bracket structure;a hydraulic cylinder attached to said bracket structure and to said inner arm;said lumen includes a ceiling and a floor;an outer arm having a proximal end and a distal end, wherein said outer arm is slidably positioned within said lumen of said inner arm;an extending/retracting means attached within said inner arm and to said proximal end of said outer arm for extending and retracting said outer arm with respect to said inner arm; anda marking means attached to said distal end of said outer arm wherein said extending/retracting means comprises: a motor means adjacent said bracket structure; and a threaded shaft having a first end and second end, wherein said first end is attached to said motor means and wherein said threaded shaft is in threaded engagement with said outer arm for extending and retracting said outer arm depending upon a direction of rotation by said motor means.