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Pipeline padding machine

  • US 5,271,168 A
  • Filed: 07/17/1992
  • Issued: 12/21/1993
  • Est. Priority Date: 07/17/1992
  • Status: Expired due to Fees
First Claim
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1. A padding machine movable along a right-of-way including a trench disposed proximate a longitudinal edge portion of the right-of-way and a source of filling material, said padding machine comprising a framework, a screen, mounted on said framework and inclined downwardly in the direction of said right-of-way opposite to that of said trench, for selectively receiving and screening filling material, means for shaking said screen to produce shifted filling material, a conveyor, disposed beneath said screen for, in use, introducing the sifted filling material passing through said screen into the trench so as to selectively cover a pipeline disposed at the bottom of the trench, a boom means, extending from the front of said framework in the direction of movement of said padding machine, for attachment of the padding machine to a towing vehicle, and mounting means having a first end connected to the boom means and a second end connected to the framework for mounting said boom means on said framework in a manner tending to maintain a constant level of said padding machine irrespective of changes in terrain.

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