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Frame work

  • US 4,869,380 A
  • Filed: 09/25/1987
  • Issued: 09/26/1989
  • Est. Priority Date: 09/26/1986
  • Status: Expired due to Fees
First Claim
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1. A rectangular prismatic frame having eight corners and composed of horizontal members and vertical members, united at each of its eight corners by a corner block of unitary construction having three channel-shaped wings at right angles to one another, each wing being shaped and dimensioned to engage telescopically the ends of the frame members at the corners of the frame and the top and bottom corner blocks having holes therein, means to secure the frame members and blocks against separation, and at each corner of the frame a vertical rod passing through the holes in the top and bottom corner blocks and fast with the frame, and adapted to be engaged by lifting means, the members being hollow with their cavities open to the cavities in the wings.

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