Interlocking rubber mat

Claim 1

A ventilated, interlocking floor tile, which comprises (a) a lower layer including a heavy, substantially solid edge region, the periphery of said edge region being provided with a plurality of interlocks to interconnect said tile with contiguous tiles whereby a floor surface covering can be constructed, (b) said interlocks comprising dovetail projecting elements extending from said edge region and alternating dovetail slots formed thereby, (c) said projecting elements interlocking with adjacently positioned dovetail slots of a contiguous tile, (d) said lower layer including an inner region formed by said heavy, substantially solid edge region and defining a cavity, (e) said heavy, substantially solid edge region including a plurality of ventilating grooves extending from the cavity to the edges of said floor tile to accommodate the flow of air to and from said cavity, and (f) an upper layer joined with said lower layer and forming an upper floor surface, (g) said upper floor surface including a unidirectional slip-resistant tread pattern, (h) said upper layer being secured to said lower layer such that said upper layer overlies the projecting elements of two predetermined sides of said substantially solid edge region of the lower layer, whereby the remaining exposed projecting elements may only interlock with the dovetail slots defined by the covered projecting elements of a contiguous tile thereby maintaining uniformity in the pattern defined by the unidirectional tread patterns of said upper layer throughout the floor surface covering constructed from said floor tiles, (i) said heavy edge region including at least one corner ventilating groove extending from said cavity to the tile corner, (j) said tile corners being rounded to define an open space between contiguous tiles to accommodate the flow of air to and from said cavity, (k) each of said projecting elements positioned adjacent the corners of each tile including a truncated side arranged and configured to lie closely adjacent the corner ventilating groove of a contiguous tile when said tiles are in an interlocked relationship, whereby the projecting element may be positioned in close proximity to the corner of said tile while accommodating said corner ventilating groove.