Oscillating device for grain drills

Details Oscillating device for grain drills Oscillating device for grain drills

1981-02-20

1982-11-23

Johnson, Richard J.

Earth working

With earth marker

Multiple interconnected markers

172469, A01B 3532

Patent

active

043600662

ABSTRACT:
An automatically oscillating device is provided for permitting opposing alternate movement by two associated movable members from a common center point.

REFERENCES:
patent: 2546412 (1951-03-01), White
patent: 3139941 (1964-07-01), Graham
patent: 3146833 (1964-09-01), Friemel
patent: 3587750 (1971-06-01), Cantral
patent: 3774691 (1973-11-01), Oak
patent: 3948326 (1976-04-01), Harbert
patent: 3955627 (1976-05-01), Brown

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