Ventilated interlocking floor tile

Claim 1

A ventilated, interlocking floor tile, which comprises a. a heavy, substantially solid edge region, the periphery of said edge region 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 projecting elements extending from said edge region and alternating dove tailed slots formed thereby, c. said projecting elements interlocking with the adjacently positioned dove tail slots of a contiguous tile, d. said tile including an inner region integral with said heavy, substantially solid edge region, e. said heavy edge region defining a cavity on the back side of said tile beneath said inner region, whereby said heavy, substantially solid edge region provides added support to the tile at the junction area between contiguous tiles and said tile contains an open air space beneath said inner region, f. said cavity including a plurality of knob-like projections extending from the back side of said tile at said inner region to floor level to support said tile, while providing an air space within said cavity, and g. said heavy edge region including ventilating grooves extending from the cavity to the tile edges to accommodate the flow of air to and from said cavity.