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System for joining building boards

DC CAFC
  • US 6,516,579 B1
  • Filed: 03/24/2000
  • Issued: 02/11/2003
  • Est. Priority Date: 05/10/1993
  • Status: Expired due to Fees
First Claim
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1. A mechanical locking system for locking a first edge of a first panel to a second edge of an identical second panel that are arranged on a subfloor, the mechanical locking system comprising:

  • means on the first edge and the second edge for forming a first mechanical connection locking the first and second edges to each other in a first direction at right angles to a principal plane of the panels;

    a locking device arranged on an underside of the first and the second edges, the locking device forming a second mechanical connection locking the first and the second edges to each other in a second direction parallel to the principal plane and at right angles to the edges;

    the locking device including a locking groove which extends parallel to and spaced from the second edge, the locking groove being open at the underside of the second edge and including an internal surface;

    the locking device further including a strip extending from the first edge, the strip extending throughout substantially an entire length of the first edge and being provided with a locking element projecting from the strip;

    the strip, the locking element, and the locking groove being configured such that when the second edge is pressed against an upper part of the first edge and is then angled down against the subfloor, the locking element can enter the locking groove;

    the locking element has a locking surface which faces the first edge and is configured so that it can contact the internal surface of the locking groove when the first and second edges are joined together to prevent substantial separation of the joined first and second edges; and

    the locking element further including an outer portion which is most distant to the joined edges and is not in contact with the locking groove when the first and second edges are joined together.

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