Dipper door retarding mechanism

  • US 8,732,994 B2
  • Filed: 03/29/2011
  • Issued: 05/27/2014
  • Est. Priority Date: 04/01/2010
  • Status: Active Grant
First Claim
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1. A mechanism for continuously retarding movements of a door of a dipper with respect to a body of the dipper, the mechanism comprising:

  • a) a base configured to be secured to the body;

    b) at least one hydraulic piston mounted to the base, the at least one piston being fluidly connected to a hydraulic pressure source;

    c) a shaft mounted to the at least one piston;

    d) at least one braking plate mounted to the shaft;

    e) at least one braking arm having a first end and a second end, the first end of the braking arm being pivotally mounted to the shaft;

    f) at least one linking member having a first end and a second end, the first end of the linking member being pivotally connected to the second end of the at least one braking arm, and the second end of the linking member being configured to be pivotally connected to the door;

    whereby when hydraulic fluid is provided to the at least one piston, the at least one piston presses the at least one braking plate and the first end of the at least one braking arm against each other, effectively retarding a pivotal movement of the at least braking arm and effectively retarding a pivotal movement of the door with respect to the body.

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