Patent ID: 7512999

Claim:
Bed plane with improved structure, comprising a plurality of slats, arranged transversally at least one portion of frame ( 10 ) of the bed and connected to said bed through slat-holders, and having a series of stems or pistons ( 11 ), where each is connected with one or more of said slats and each stem or piston ( 11 ) is associated with at least one respective elastic sliding element ( 12 ), each stem or piston ( 11 ) being fixed to at least one first pulley or sliding guide ( 15 ) for the transmission of motion, which occurs due to the interposition of flexible member ( 16 ), which is selected from cords, belts, chains and/or cables, that are connected to the frame ( 10 ) of the bed plane, so that said stems or pistons ( 11 ) react to the pressures exerted by a body lying down on the bed plane, and compensate for the sinking created by the parts of the body between the shoulders and the pelvis, with an upward thrust wherein said elastic sliding element ( 12 ) is a spring which surrounds said stems or pistons ( 11 ).