Title: Self-propelled disk harrow machine

Abstract: A self propelled disk harrow having four gangs of disc members attached thereto which are rotated to propel the disk harrow and to thereby till the soil. Wheels are provided for allowing the disk harrow to travel on public roads and to aid in propelling the disk harrow. When the disc members extend too far into the soil or otherwise become ineffective in propelling the disk harrow, such as because of wet or sandy soil, the weight of the disk harrow transfers to the wheels and the wheels tend to primarily propel the disk harrow.

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Inventors: De Haai, Kermit M. (Monroe, IA, US)

Application Number: 892675
Filing Date: 1978-04-03
Publication_date: 1979-11-20
Assignee:
Primary Class(es): 172/55 172/56, 172/114, 172/116, 172/587, 384/147
Other Classes:
US Patent Ref:

1040890	Oct, 1912	Cook	172/55.
1302295	Apr, 1919	Botsford	172/116.
2675750	Apr, 1954	Boyer	172/55.
3213946	Oct, 1965	Carrick	172/587.

Other Refs: 2023623101 of

May, 1930	AU
�, 1900	GB

Primary Examiner: Shapiro, Paul E.
Assistant Examiner:
Attorney: Henderson & Sturm