Robust mine ventilation door with single actuation system

  • US 9,181,802 B2
  • Filed: 02/22/2013
  • Issued: 11/10/2015
  • Est. Priority Date: 07/20/2012
  • Status: Active Grant
First Claim
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1. A mine door assembly, comprising:

  • a frame including a cap frame portion, a sill frame portion, a first post frame portion and a second post frame portion, the cap frame portion and the sill frame portion coupled to respective top and bottom ends of the first post frame and second post frame portions;

    a major wing pivotally coupled to the cap frame portion via a major cap bearing and pivotally coupled to the sill frame portion via a major sill bearing, the major wing including a major hub located adjacent to the major cap bearing;

    a minor wing pivotally coupled to the cap frame portion via a minor cap bearing and pivotally coupled to the sill frame portion via a minor sill bearing, the minor wing including a minor hub located adjacent to the minor cap bearing;

    a connecting bar having a first end moveably coupled to the major hub and a second end moveably coupled to the minor hub; and

    a drive assembly operatively coupled to the connecting bar and configured to rotate the major and minor wings of the mine door assembly in a common rotational direction such that a majority of the major wing is disposed on one side of the frame when the major wing is in a fully open position and a majority of the minor wing is disposed on another side of the frame opposite the one side of the frame when the minor wing is in a fully open position;

    wherein the major hub includes a foot having an attachment portion moveably coupled to the first end of the connecting bar,a major hub arm including a first end and a second end, the first end of the major hub arm including a hub arm cap attached thereto,an arm top plate coupled to a top portion of the major hub arm, the arm top plate including a first hole and a second hole,a forearm, a first end of the forearm coupled to the foot, the forearm extending through the first hole of the arm top plate and extending through the major hub arm,a forearm cap coupled to a second end of the forearm opposite the first end of the forearm, anda major hub backing plate coupled to the second end of the major hub arm, the major hub backing plate coupled to the major wing.

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