Multiple level roll-in cot

An elevating cot adapted to be rolled into emergency vehicles having different floor heights, said cot comprising:

• a rectangular undercarriage having a leading end and a trailing end, caster wheels affixed to said undercarriage,
• a generally rectangular cot frame overlying said undercarriage, said cot frame having a leading end and a trailing end, and a pair of loading wheels mounted on the leading end of said cot frame,
• coacting pairs of complementary cross-forming frame members extending between and interconnecting said cot frame and said undercarriage, each of said pairs of frame members comprising a first frame member of fixed length and a second frame member having an extensible section at its lowermost end, the frame members in each pair being pivotally connected together intermediate their opposite ends by pivot means which are offset with respect to a point of intersection of each of said respective pairs,
• the first frame members of each pair being rotatably connected at their lowermost ends to opposite sides of said undercarriage at the trailing end thereof, the second frame members of each pair having their extensible sections rotatably connected at their lowermost ends to opposite sides of said undercarriage at the leading end thereof, the uppermost ends of said first frame members being rotatably connected to opposite sides of said cot frame toward the head end thereof, bracket means on the opposite sides of the cot frame toward the trailing end thereof, said bracket means extending lengthwise of the cot frame and each having an elongated slot therein, slot engaging means at the uppermost ends of said second frame members slidably mounting the second frame members to the cot frame, whereby as the cot frame is elevated relative to said undercarriage it will assume at least one elevated position in which the cot frame is inclined upward in the direction of its leading end so that the loading wheels on the cot frame may be positioned to enter an emergency vehicle having a high floor level,
• and latching means for selectively securing said cross-forming members in a plurality of predetermined positions of use.