Milling machine with re-entering back wheels

CAFC
  • US 7,140,693 B2
  • Filed: 04/26/2002
  • Issued: 11/28/2006
  • Est. Priority Date: 04/27/2001
  • Status: Active Grant
First Claim
Patent Images

1. A work machine comprising:

  • a frame supported by a pair of front wheels or tracks and a pair of rear wheels or tracks, at least one of the wheels or tracks being associated with a respective lifting column adapted to raise and lower said frame relative to the respective wheel or track;

    a work tool supported by said frame;

    a drive mechanism adapted to rotate said work tool and at least one of said wheels or tracks;

    an articulation apparatus adapted to pivotally move said one of said wheels or tracks associated with said lifting column between a projecting position and a retracted position relative to said frame, said articulation apparatus including;

    a support arm pivotally connecting said frame to the lifting column associated with said one wheel or track;

    a first actuator connected to said support arm and operable to pivot said support arm relative to said frame;

    a second actuator adapted to rotate said at least one wheel or track about a vertical axis.

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