04530405 is referenced by 51 patents and cites 10 patents.

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.

Title
Planter row marker
Application Number
6/592521
Publication Number
4530405
Application Date
March 23, 1984
Publication Date
July 23, 1985
Inventor
Gregory S White
Moline
IL, US
Agent
Henderson & Sturm
Assignee
Deere & Co
IL, US
IPC
A01B 69/02
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