System for loading cargo
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United States of America Patent
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Sep 17, 2013
Grant Date -
May 12, 2011
app pub date -
Nov 10, 2009
filing date -
Nov 10, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A simplified apparatus is provided to exploit certain unique characteristics of DC winches, whereby two winches may be cooperatively joined to load and unload a light-duty truck. Since the speed and torque are linearly related in a DC motor, it possible to manipulate certain parameters, such as the resistance of the armature and the mechanical leverage applied to the load, to result in a stable dynamic between two oppositely-directed DC-motor winches. The novel concept avoids the need for controls to coordinate the winches, and no installation is required that would otherwise limit the use of the truck for other purposes.
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