Rotary swather for hay and grass work employs joint to allow swather arm to be moved up and down to suit ground level.

摘要

The arm is part of the rotary swather used to collect and windrow grass and hay etc in harvesting and the arm rotates in tube housing and can move in the vertical by means of a joint. In detail, the system involves a pair of metal plates to move up and down together with four iron flats. A tensile spring draws the arm down as required to suit the ground contours and changes in level.