Patent ID: 8448392

Claim:
A disk shaped modular plastic floor tile comprising: three sets of a first projection ( 13 ), a second projection ( 14 A), and a third projection ( 14 B) arranged clockwise on an edge wherein the second projection ( 14 A) and the third projection ( 14 B) of the same set are spaced apart; and a plurality of notches ( 12 ) each formed between any adjacent first projection ( 13 ) and second projection ( 14 A), any adjacent second projection ( 14 A) and third projection ( 14 B), or any adjacent third projection ( 14 B) and first projection ( 13 ); wherein the first projection ( 13 ) has a convex edge ( 131 ) formed continuously between two adjacent notches ( 12 ); wherein each respective notch ( 12 ) of the plurality of notches ( 12 ) has a concave edge ( 121 ) formed continuously with the convex edge ( 131 ); wherein each of the second projection ( 14 A) and the third projection ( 14 B) comprises a convex edge ( 141 ) formed continuously with a first of the respective concave edges ( 121 ), a first straight edge ( 142 ) formed continuously with the convex edge ( 141 ), and a second straight edge ( 143 ) formed continuously between the first straight edge ( 142 ) and a second of the respective concave edges ( 121 ); wherein the second straight edge ( 143 ) is at an obtuse angle (θ) with respect to the first straight edge ( 142 ); and wherein the convex edge ( 141 ) of the second projection ( 14 A) and the convex edge ( 141 ) of the third projection ( 14 B) face each other.