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Gauge wheel mounting

  • US 5,538,085 A
  • Filed: 04/17/1995
  • Issued: 07/23/1996
  • Est. Priority Date: 04/17/1995
  • Status: Expired due to Term
First Claim
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1. In an agricultural implement with tool support tube rockably connected to an implement tool bar for movement vertically with respect thereto, the tube having upright side walls, an earth engaging tool supported from the tube and moveable therewith, a tube height control system for maintaining the tube a preselected distance above the ground, the height control system including:

  • a pivot bushing located in the tube;

    a control arm pivotally connected to the pivot bushing for rocking about an axis, the arm having an upper end extending above the tube and a lower end extending below the tube;

    a ground-contacting gauge wheel supported from the lower end of the arm;

    an adjustable length assembly supported above the tube and connected to the upper end of the control arm for pivoting the control arm and moving the gauge wheel vertically relative to the tube; and

    wherein the tube side walls include first and second opposed apertured portions, and the bushing comprises first and second members, the first member having an outer portion with a bearing surface, a side wall engaging portion providing a friction fit in the first apertured portion, and an axially inward portion projecting towards the second apertured portion, the second member supported in the second apertured portion and projecting inwardly therefrom into contact with the first member to provide a rigid joint, and a bolt member extending through the first and second members and apertured portions, and urging the members into contact with each other, the rigid joint preventing inward deformation of the tube side walls.

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