Load transfer device for seed distribution systems in seeders and fertilizer machines
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United States of America Patent
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Aug 19, 2014
Grant Date -
Oct 11, 2012
app pub date -
Apr 6, 2012
filing date -
Apr 7, 2011
priority date (Note) -
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Abstract
The movement along the ground in seed and fertilizer distribution systems of seeder and fertilizer machines is improved by a load transfer device comprising a deformable parallelogram-shaped structure attached to the machine tool holder bar at one end and to the distribution system at the other end, and a transfer rack that articulates in one of the parallelogram vertexes acting as a rocker arm. The rocker arm is connected at one end to the parallelogram and at the other end to at least one spring through a lever arm that extends downwardly and divergently, generating a crossing angle between the parallelogram lower un upper sides, creating a torque that varies not only for the spring tension by also for the ratio of the effective lengths of the involved lever arms.
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