Patent ID: 8672297

Claim:
A scissor lifting platform comprising: at least two crossing lower scissor bars; at least two crossing upper scissor bars, each upper scissor bar articulatedly connected to a corresponding lower scissor bar; a lower joint connecting the two lower scissor bars with each other; an upper joint connecting the two upper scissor bars with each other; at least one lifting aggregate having at least one operating rod connected to one of the upper scissor bars or to one of the lower scissor bars, wherein the operating rod works together with an elevating mechanism for lifting and reinforcing a vertical force up to a predetermined lifting height of the scissor lifting platform; and at least one rail having at least one contact area and being supported on the upper scissor bars, one of the upper scissor bars being articulatedly connected to the at least one rail and the other one of the upper scissor bars being guided by the at least one rail so as to be movable in a longitudinal direction when the scissor lifting platform moves; wherein the elevating mechanism includes: at least one expansion lever coupled to the operating rod, and an expansion lever retainer provided on the corresponding lower scissor bar if the operating rod is connected to one of the upper scissor bars or provided on the corresponding upper scissor bar if the operating rod is connected to one of the lower scissor bars; wherein the expansion lever is in contact with the expansion lever retainer up to first and second predetermined lifting heights of the scissor bars; and wherein the lifting aggregate is a hydraulic lifting cylinder and the operating rod is a piston rod of the hydraulic lifting cylinder.