Bed

Claim 1

A bed comprising a bed frame divided into four sections, a first section of which constitutes a section for supporting the back or the head of a person lying in or sitting on the bed, a second section of which constitutes a section for supporting the person's buttocks, a third section of which constitutes a section for supporting the person's thighs, and a fourth section of which constitutes a section for supporting the person's crus and feet, CHARACTERIZED in that the four sections of the bed frame are linked together through pivot joints, a first pivot joint connecting the first and second sections of the bed frame to one another, a second pivot joint connecting the second and third sections of the bed frame to one another, and a third pivot joint connecting the third and fourth sections of the bed frame to one another, in that the bed comprises a first and a second power-generating means adapted to transmit power to the first and the fourth section, respectively, of the bed frame for generating a pivoting of the first and the fourth section, respectively, of the bed frame relative to the second and third section, respectively, of the bed frame round the first and the third pivot joint, respectively, of the bed frame, in that the bed comprises an engageable and disengageable power-transmitting means adapted to, in a first engaged position, connect the first and the third section of the bed frame to one another and generate a pivoting of the third section of the bed frame relative to the second section of the bed frame round the second pivot joint coincident with a pivoting of the first section of the bed frame relative to the second section of the bed frame round the first pivot joint, however, in a direction opposite to the pivoting direction of the pivoting of the first section of the bed frame relative to the second section of the bed frame and further adapted to, in a second disengaged position, allow that the first section of the bed frame may pivot relative to the second section of the bed frame round the first pivot joint without simultaneously generating a pivoting of the third section of the bed frame relative to the second section of the bed frame round the second pivot joint, and in that the bed comprises a carrier means adapted to co-operate with the third and fourth sections of the bed frame and allow that the fourth section of the bed frame is lowered relative to the third section of the bed frame through pivoting relative to the third section round the third pivot joint, however, adapted to prevent that the fourth section of the bed frame is raised relative to the third section of the bed frame by pivoting relative to the third section round the third section round the third pivot joint beyond a position in which the third and fourth sections of the bed frame are positioned in the same plane.