Patent attributes
A vertical joint system for a surface covering panel having an upper and lower surfaces, and a plurality of sides located between the upper and lower surfaces. The joint system has a male part along at least one side and a female part along an opposite side. The female part has a protrusion that extends from the lower surface and an outer most female surface on the protrusion. The male part has a recess that opens onto the lower surface with a portion of the recess forming an inner most male surface. The outer most female surface and the inner most male surface arranged so that when the male part of one surface covering panel is engaged with a female part of a second surface covering panel the outer most female surface overlies the inner most male locking surface at a first location and a second location.
