Patent ID: 7665263

Claim:
An improved hardwood flooring plank for assembly into a hardwood floor comprising a plurality of like planks, each plank comprising: a solid hardwood wear layer having length from one foot to eight feet, width from two inches to ten inches, and thickness from two millimeters to eight millimeters, having top and bottom surfaces, the top surface coated with five to nine coats of non-toxic ultraviolet cured urethane base finish and further comprising a micro-bevel around the entire top surface perimeter, the micro-bevel cut at a forty-five degree angle and 0.5 millimeter in width and depth; and a bottom layer comprising a plurality of solid hardwood strips of uniform dimension adhesively attached one to another in a finger-jointed formation to provide a uniformly planar top surface, a uniformly planar bottom surface, butt end surfaces, and longitudinal side surfaces, the bottom layer top side surface to receive and support the wear layer by adhesive bonding to the wear layer bottom surface, the strips having generally uniform square or rectangular cross-sections with thicknesses ranging from a quarter inch to three-quarters of an inch and widths ranging from half an inch to two inches and lengths from four inches to thirty inches arranged with the same grain orientation as the wear layer and running longitudinally the length of the top layer, the bottom layer bottom side surface further comprising a plurality of evenly spaced kerfs running parallel the length of the bottom side surface, with outside kerfs of the evenly spaced kerfs typically spaced one inch from each respective bottom layer longitudinal side surface, the kerfs having widths ranging from 3 millimeters to 6 millimeters and depths ranging from 6 millimeters to 13 millimeters, the bottom layer longitudinal side surfaces and butt end surfaces further comprising tongue and groove fittings to facilitate bottom layer interconnection between like constructed planks, the bottom layer bottom side surface further comprising one clear coat of non-toxic ultraviolet cured urethane finish, and the bottom layer side surfaces further comprising a bevel cut back 1 millimeter on both sides of the entire length of the bottom layer side surfaces.