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Combined depth-control and wing-lift hydraulic circuit

  • US 4,700,784 A
  • Filed: 01/31/1986
  • Issued: 10/20/1987
  • Est. Priority Date: 01/31/1986
  • Status: Expired due to Term
First Claim
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1. In an implement having a tool bar spaced above the ground, the tool bar including at least one wing pivotally connected thereto and a wing wheel mounted on the wing for operationally supporting the wing on the ground, a combined depth-control, wing-lift and wing wheel tuck circuit comprising:

  • depth-control means for raising and lowering the tool bar relative to the ground;

    wing-lift means for causing the wing to be partially rotated about the tool-bar pivot between a substantially horizontally-disposed position and a substantially vertically-disposed position, relative to the ground; and

    wheel-tuck means for moving the wing wheel between an inwardly-drawn position proximate to the wing and second position spaced further from the wing than the inwardly-drawn position, and for causing the wing wheel to be disposed in one of these two wheel-spacing positions for a first preselected period of time.

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