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Locking joint for joining structural members

  • US 8,864,407 B1
  • Filed: 03/17/2011
  • Issued: 10/21/2014
  • Est. Priority Date: 03/17/2011
  • Status: Expired due to Fees
First Claim
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1. An interlocking joint in a furniture interconnection system for reversibly connecting a furniture frame board element having at least one end perpendicularly to a furniture frame upright element, comprising:

  • an irregular quadrilateral mortise, the mortise a cavity cut into the upright element, wherein the mortise has a top portion and a bottom portion that form one continuous cavity including a front opening at the bottom portion, the bottom portion having a square shape that includes the front opening and abuts the top portion such that the top portion forms an isosceles right triangle shape with the bottom portion; and

    an irregular substantially hexagonal tenon on the end of the board element, the tenon has a top right angle, and four angles each of approximately one hundred thirty-five degrees, the tenon for inserting into the mortise with the board element substantially parallel to the upright frame element and pivoting inside the mortise until the board element is perpendicular to the upright frame element, forming a reversible interlocking joint for connecting the board element to the frame element;

    wherein, when the tenon is interlocked into the mortise, the tenon and the mortise define a pair of spaced apart gaps between the tenon and the mortise, each gap having the shape of a smaller isosceles right triangle.

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