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Bonded panel interlock device

DC
  • US 4,769,963 A
  • Filed: 07/09/1987
  • Issued: 09/13/1988
  • Est. Priority Date: 07/09/1987
  • Status: Expired due to Term
First Claim
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1. In a rigid building panel with substantially parallel planar front and rear metal sheets separated by an insulating rigid foam core bonded to the sheets and having a first pair of opposite parallel and substantially straight end edges, the improvements comprisinga second pair of opposite longitudinal edges having complimentary first and second interlocking elements forming the longitudinal edge of each metal sheet,the first interlocking element forming a U-shaped projection along matching edges of the front and rear metal sheets with a first core edge between the first interlocking elements having an inwardly projecting dish-shaped geometric configuration,the second interlocking element forming a ramp and a groove behind the ramp along matching edges of the front and rear metal sheets with a second core edge between the second interlocking elements having an outwardly projecting geometric shape conforming to the dish-shaped geometric configuration of the first core edge,the first interlocking U-shaped projections on the second pair of edges of the metal sheets capable of sliding over the ramp of the second interlocking elements and snapping in place in the groove behind the ramp forming a tight interlock fit and forming an edge to edge insulating fit between the first and second core edges.

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