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Center pivot hitch assembly

  • US 4,681,335 A
  • Filed: 03/06/1986
  • Issued: 07/21/1987
  • Est. Priority Date: 03/06/1986
  • Status: Expired due to Term
First Claim
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1. An agricultural implement hitch assembly and stabilization arrangement, comprising:

  • a tool bar adapted to receive associated ground-working tools, said tool bar being provided with means for effecting vertical movement of the tool bar between raised and lowered positions;

    a wheeled implement including a pair of laterally spaced wheels defining a transverse wheel axis;

    frame means rigidly connected to and extending forwardly of said tool bar;

    means pivotally connecting a forward end portion of said frame means to a backside of said wheeled implement whereby said tool bar is laterally pivotable relative to said wheeled implement, said frame means including first lower linking means and second upper linking means arranged in non-parallel relation, said second upper linking means being positioned to direct an overhung load created on said tool bar in said raised position thereof substantially along said transverse axis of said sheeled implement; and

    hydraulic stabilization means extending between and connected with said wheeled implement and said frame means, said stabilization means comprising extensible hydraulic fluid actuator means, and means for controlling fluid flow into and from said actuator means for selectively (1) fixing the effective length of said actuator means to maintain said tool bar in a fixed, generally perpendicular disposition relative to the longitudinal axis of said wheeled implement, and (2) controlling said actuator means to stabilize movement of said tool bar relative to said wheeled implement;

    wherein in said raised position of said tool bar, said upper and lower linking means of said frame means are arranged in forwardly converging relation to each other, with the upper and lower linking means respectively defining lines of action which intersect generally at said transverse wheel axis of said wheeled implement.

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