Patent ID: 7810188

Claim:
A nursing bed including a multi-part bed frame for supporting a mattress, the bed frame having opposing lateral sides and a head end and a foot end comprising: a bed lifting mechanism that includes a lower frame and an upper frame on which the bed frame is arranged; a lever mechanism that connects the lower frame to the upper frame, said lever mechanism including on each of the lateral sides of the bed frame: a head end lower lever and a foot end lower lever, a lower end of each lower lever being pivotably coupled to the lower frame; a horizontal coupling brace that is pivotally connected to upper ends of both lower levers; a head end upper lever and a foot end upper lever, a respective upper end of each upper lever being pivotally coupled to the upper frame and a respective lower end of each upper lever being pivotably coupled to the horizontal coupling brace; and a diagonally extending coupling brace that is pivotally connected to a respective one of the upper levers between the upper and lower ends of said lever and to a respective one of the lower levers between the upper and lower ends of said lever; and a linear drive connected between the lower frame and the upper frame extending in diagonal relation to the upper and lower frames for forming an acute angle with said upper and lower frames with the pivotal couplings of the upper lever to the upper frame being horizontally offset from the pivotal couplings of the lower levers with the lower frame.