Patent ID: 6237296
Filing Date: 2001-05-29
Classification: E04F,Y10T

Abstract:
A tongue-and-groove floorboard comprising a lower board (10) and an upper board (20) mated with the lower board (10), said lower board (10) and said upper board (20) each comprising:a plurality of channels (11) and ribs (12) longitudinally formed in pairs, wherein said channels (11) and ribs (12) in said lower board (10) and said upper board (20) are complementary;a plurality of recesses defined between each lower board (10) and upper board (20), wherein said recesses in said lower board (10) and said upper board (20) are corresponding and can construct passages, each of sail passages having a keyhole-like cross-section;sound insulation material (30) deposited in said passages constructed by said recesses in said lower board (10) and said upper board (20);a plurality of slots (16, 17) defined therein not parallel to said channels (11) and ribs (12) and being staggered respectively in said lower board (10) and said upper board (20); anda tongue (21) formed at a first side of each of said lower board (10) and upper board (20), and a groove (22) defined in a second side opposite the first side of each of said lower board (10) and upper board (20).