Robotic thumb assembly
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United States of America Patent
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Apr 23, 2013
Grant Date -
Mar 24, 2011
app pub date -
Sep 22, 2009
filing date -
Sep 22, 2009
priority date (Note) -
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Abstract
An improved robotic thumb for a robotic hand assembly is provided. According to one aspect of the disclosure, improved tendon routing in the robotic thumb provides control of four degrees of freedom with only five tendons. According to another aspect of the disclosure, one of the five degrees of freedom of a human thumb is replaced in the robotic thumb with a permanent twist in the shape of a phalange. According to yet another aspect of the disclosure, a position sensor includes a magnet having two portions shaped as circle segments with different center points. The magnet provides a linearized output from a Hall effect sensor.
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