Patent ID: 7780617

Claim:
A traction device, comprising: a frame having a first end, a second end horizontally spaced a distance from the first end, a horizontal member connecting the first end to the second end, wherein the first end of the frame is a first vertical member having an upper end and a lower end and the second end of said frame is a second vertical member having an upper end and a lower end, the horizontal member spanning the distance between the first end and the second end, the horizontal member being attached to the upper end of the first vertical member and to the upper end of the second vertical member; a first winch attached to the first vertical member; a first tension measuring scale mounted directly on the horizontal member and substantially parallel thereto, the first tension measuring scale having a first end and a second end; a first pulley mounted on the horizontal member adjacent the upper end of the first vertical member and between the first end of the tension measuring scale and a second pulley mounted on the horizontal member adjacent the upper end of the second vertical member and between the second end of the tension measuring scale; a first cord having a first end attached to the first winch and a second end attached to the first end of the first tension measuring scale, the first cord being disposed about the first pulley; a first traction harness; and a second cord having a first end attached to the second end of the first tension measuring scale and a second end attached to the traction harness, the second cord being disposed about the second pulley.