Patent ID: 7520005

Claim:
A hospital sitting-up bed ( 1 ) comprising a height-adjustable base ( 8 ), a support frame ( 11 ) having a center part ( 13 ), a back part ( 14 ) connected to the center part ( 13 ), a thigh part ( 15 ) connected to the center part ( 13 ), and a lower-leg part ( 16 ) connected to the thigh part ( 15 ), said center part ( 13 ) being connected to said back part ( 14 ) and thigh part ( 15 ) and said thigh part ( 15 ) being connected to said lower-leg part ( 16 ) by respective pivot joints ( 28 ) each having a horizontal joint axis, at least one drive ( 87 , 97 ) for pivoting said parts of the support frame ( 1 ) relative to each other such that in one position they assume a configuration of a horizontal bed and in another position they assume a position similar to a chair in which said lower-leg part ( 16 ) extends downwards, and an actuating device ( 79 , 80 , 26 ) operable by said at least one drive for moving said thigh part into a position in which it extends diagonally upwardly in a direction toward the lower leg part ( 16 ) starting from the center part ( 13 ) when said parts are moved to the configuration similar to a chair, said actuating device ( 79 , 80 , 26 ) including a cam mechanism for pivoting said thigh part upwardly as an incident to movement of said lower leg part downwardly toward the configuration similar to a chair and for retaining it in that position when the parts are in the configuration similar to a chair.