Planter row marker

Details Planter row marker Planter row marker

1984-03-23

1985-07-23

Johnson, Richard J.

Earth working

With earth marker

172501, A01B 6902

Patent

active

045304050

ABSTRACT:
A row marker for a planting implement having a floatation slot formed in an extendable marker link arm. The link arm slot is generally longitudinal to the link arm and has a transverse hooked portion at the outer end. Engagement of the end pin of an activating hydraulic cylinder in the hook portion results in a smooth even motion of the marker as it moves from the vertical position to the normal working position. Use of a spring tensioned cable simultaneously provides for full marker arm extension prior to reaching the working position and clear marking through the full range of floatation.

REFERENCES:
patent: 895507 (1908-08-01), Smith
patent: 3072200 (1963-01-01), Yerkes
patent: 3650333 (1972-03-01), Fueslein
patent: 3666019 (1972-05-01), Yeske
patent: 3766987 (1973-10-01), Orthman
patent: 4047575 (1977-09-01), Wagner
patent: 4074766 (1978-02-01), Orthman
patent: 4207950 (1980-06-01), Kinzenbaw
patent: 4232747 (1980-11-01), Pfenninger
Avco New Idea, Single Frame Planters, Form No. 8330-1, undated.

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