Patent ID: 6694688
Filing Date: 2004-02-24
Classification: E04F

Abstract:
A surface covering system, comprising:a plurality of substantially rectangular covering units, each covering unit having a top surface, a bottom surface, and four sides, the four sides comprising a first pair of opposing sides and a second pair of opposing sides, each of the four sides having a groove; and a plurality of L-keys, the L-keys having a first portion and a second portion joined to the first portion to form a substantially 90 degree angle, the first portion having an inner edge, and an outer edge, the second portion having an inner edge and an outer edge, the first portion length being substantially equal to the length of the covering unit first pair of sides, the second portion length being substantially equal to the length of the covering unit second pair of sides, the L-key first portion width being approximately twice the width of the covering unit grooves, the L-key second portion width being approximately twice the width of the covering unit groove, the L-key first and second portion inner and outer edges being insertable in the covering unit grooves.