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Row unit for agricultural implement

  • US 9,192,089 B2
  • Filed: 02/20/2013
  • Issued: 11/24/2015
  • Est. Priority Date: 09/15/2010
  • Status: Active Grant
First Claim
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1. A pressure control unit for an agricultural implement pivotably attached via a parallel-bar linkage assembly to a towing frame of an agricultural machine, the parallel-bar linkage assembly including a crossbar attached to the linkage bar and having a crossbar hole, the linkage bar being attached to the agricultural implement, the pressure control unit comprising:

  • a support bracket configured to operatively attach to one of the towing frame and the agricultural implement; and

    a hydraulic actuator assembly including;

    a housing operatively attached to the support bracket, the housing forming therein a fluid cavity configured to receive pressurized fluid, the housing having a rounded surface operatively engaging the support bracket such that the housing can tilt with respect to the support bracket, anda movable ram extending out of the housing and having a ram stem configured to operatively attach to the crossbar, the ram stem projecting through the crossbar hole to connect the movable ram to the crossbar, the movable ram being movable in response to pressurized fluid received in the fluid cavity to thereby pivot the linkage bar, the ram stem having a curved flange configured to slidingly mate with another component such that the movable ram can tilt with respect to the linkage bar.

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