Floor panel for floating floor

Claim 1

A floor panel for a floating floor, said floating floor having a plurality of said floor panels elastically supported by buffer members laid on a floor slab, said floor panel comprising a hollow panel and plural supporting means mounted on said hollow panel, said hollow panel having upper and lower face panels spaced by sash bars arranged between them at proper intervals to form elongated cavities, each of said cavities being opened at opposite ends, said upper and lower face panels being provided with a plurality of through holes distributed uniformly over the face panel, said holes of said upper face panel being respectively aligned with those of the lower face panel and each having an upper opening diameter ranging from 5 to 20 milimeters, a ratio of whole upper opening area of said holes to an upper surface area of said floor panel being within the range of 0.1 to 20%, said supporting means being mounted on said lower face panel at proper intervals to form space between said floor panel and buffer members when said floor panel is arranged on said buffer members.