Patent ID: 7380383
Filing Date: 2008-06-03
Classification: E04B,E04F,F16B,Y10T

Abstract:
1. A joint formed at a junction between adjacent boards, the joint comprising: a first board, comprising an upper surface, a lower surface and a groove; a second board joined to the first board, and comprising an upper surface, a lower surface and a tongue, said upper surface of said first board and said upper surface of said second board abutting each other; a first equalizing cavity located adjacent to an upper end of a proximal end of the tongue below said abutting surfaces; wherein a distal end of the tongue is smaller than a proximal end of the groove; a second equalizing cavity, formed by a gap between the proximal end of the groove and the distal end of the tongue; and further comprising glue disposed in at least one of the first equalizing cavity and the second equalizing cavity.