Patent ID: 7610637

Claim:
A patient support apparatus comprising a base frame including a base frame member, a deck, and a frame supporting the deck, at least one lift arm supporting the frame relative to the base frame, the at least one lift arm having a first end and a second end, the at least one lift arm being pivotably coupled to the base frame adjacent the first end of the at least one lift arm, and the at least one lift arm being slidably coupled to the base frame member of the base frame adjacent the second end of the at least one lift arm, and a link pivotably coupled to the base frame member and pivotably coupled to the at least one lift arm such that the angle between the at least one lift arm and the base frame changes as the position of the second end of the at least one lift arm relative to the base frame changes, wherein the first end of the at least one lift arm is higher in elevation than the second end of the at least one lift arm when the frame is in a raised position relative to the base frame and wherein the first end of the at least one lift arm is lower in elevation than the second end of the at least one lift arm when the frame is in a lowered position relative to the base frame.