Patent ID: 7003925
Filing Date: 2006-02-28
Classification: E04F

Abstract:
1. A locking system for mechanical joining of floorboards having a core and a first joint edge portion and an opposite second joint edge portion, adjoining floorboards in the mechanically joined position having the first joint edge portion and the second joint edge portion joined at a vertical joint plane, said locking system comprising: a) for vertical joining of the first joint edge portion of a first floorboard and the second joint edge portion, of an adjoining second floorboard, a first mechanical cooperating locking device, and b) for horizontal joining of the first joint edge portion and the second joint edge portion, a second mechanical cooperating locking device which comprise wherein: there is an intermediate surface between the upper side of the locking strip and the lower part of the locking surface of the locking element, and there is a space between the lower groove part and the intermediate surface.