Rotating field plot row marker

US4237984A · kind A · utility

Assignee

• The United States of America, as represented by the Secretary of Agriculture · US

Inventors

• David L. Cobb · Lansing, US
• Brian Doyle · Conroe, US
• James A. Webster · New York, US
• David H. Smith · Hickory, US

Key dates

• Filing date: May 30, 1979
• Grant date: Dec 9, 1980
• Expiry date: May 30, 1999

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01C5/06
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A rotating row marker equipped with both transverse and longitudinal imprinting projections impresses a grid-type pattern into the soil for precise placement of seeds or seedlings in a subsequent planting operation. One of the transverse projections houses an eccentric weight for gravitationally returning the row marker to a predetermined position when the row marker is raised above the earth.