LIFT ARM STRUCTURE WITH AN ARTICULATED KNEE PORTION
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Dec 30, 2013
filing date -
Mar 15, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A lift arm structure for use on a power machine is disclosed. As disclosed, the lift arm structure includes an articulated knee portion pivotally attached to a main lift arm portion. The articulated knee portion is pivotally coupled to a distal end of the main lift arm portion at a bend angle. The bend angle can be fixed by a fixed length rod connected to the main lift arm portion and the articulated knee portion or adjustable through an actuator operably connected to the main lift arm portion and the articulated knee portion. In some applications, the actuator is a hydraulic cylinder connected to the lift arm portion and the articulated knee portion. A rod of the cylinder is extended and retracted to increase or decrease the bend angle of the articulated knee portion. The bend angle can be adjusted utilizing input from operator input devices or machine controlled utilizing pre-programmed bend angle parameters.
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