Patent ID: 7950212

Claim:
A system for supporting a cutterbar of a crop harvesting header comprising: a first arm pivotably secured to the header, the first arm including a first portion configured to support the cutterbar, the first arm including a second portion including a torsion device having a mass of elastic material connected to an adjustment assembly, the second portion configured to be pivotably rotatable about an axis by the adjustment assembly to selectably increase or decrease a force appliable to the first portion in order to raise or lower the first portion with respect to the header; the adjustment assembly including a second arm interconnecting the torsion device and an adjustment device having a first segment, the first adjustment device configured to movably receive a connecting adjustment device; wherein the first segment of the adjustment device is configured to follow a predetermined path in a first direction with respect to the axis in response to movement of the connecting adjustment device in the first direction with respect to the adjustment device; and wherein the first segment of the adjustment device is configured to follow a predetermined path in a second direction with respect to the axis in response to movement of the connecting adjustment device in the second direction opposite the first direction with respect to the adjustment device.