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Agricultural implement with raisable lift frame rotatable about vertical axis

DC
  • US 4,721,168 A
  • Filed: 09/23/1985
  • Issued: 01/26/1988
  • Est. Priority Date: 09/23/1985
  • Status: Expired due to Term
First Claim
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1. An agricultural implement adapted to be pulled by a tractor with a hitch and convertible between a use position and a transport position without unhitching from the tractor hitch, comprising:

  • a carrier frame including a plurality of ground support wheels;

    draft tongue means connecting said carrier frame to the tractor hitch for permitting pivotal movement between said tractor and said implement about a first vertical hitch axis;

    lift frame means including a lift frame and plurality of work units spaced along said lift frame, said lift frame including at least an integral center frame section extending to either side of the centerline of the implement in the use position;

    mounting means for mounting said lift frame such that said center frame section thereof is rotatable about a second vertical axis of rotation;

    powered lift linkage means connecting said lift frame to said carrier frame for lifting said lift frame and said work units above said carrier frame to a raised position wherein all of said units are elevated above said support wheels; and

    power swing means for rotating said lift frame in said raised position about said second vertical axis between said use position and said transport position in which said lift frame is elongated in the direction of travel; and

    characterized in that the said second vertical axis of rotation is located such that the weight of said lift frame means is substantially uniformly distributed to either side thereof in the direction of elongation of said lift frame means.

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