Hydraulically controlled rotary harrow for tillage apparatus and system
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United States of America Patent
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Feb 2, 2016
Grant Date -
Sep 11, 2014
app pub date -
Mar 10, 2014
filing date -
Mar 11, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A tillage apparatus having a rotary harrow mounted thereon with mounting elements utilizes a cooperative combination of: a compressible material at the mounting element to permit relative motion between the harrow and the mounting element in response to a motion of the harrow; and, a hydraulic actuator operated under a first pressure to lower the rotary harrow and maintain engagement of the rotary harrow with the ground. A pressure relief element is utilized to reduce back pressure in response to the harrow striking a hard impediment on the ground during operation of the tillage apparatus in a field. The combination cooperates to reduce damage to the harrow and/or other parts of the tillage apparatus when the harrow strikes a hard impediment such as a rock.
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