Method and apparatus for reducing at least one friction force opposing an axial force exerted through an actuator element
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United States of America Patent
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Apr 24, 2012
Grant Date -
Jun 24, 2010
app pub date -
Dec 22, 2008
filing date -
Dec 22, 2008
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Abstract
Actuator elements such as cables or push rods in an instrument are used for manipulating an end effector or distal end of the instrument. Each actuator element extends within a tubular housing and either the tubular housing is axially rotated about the actuator element or the actuator element is axially rotated within the tubular housing to reduce at least one force opposing an axial force exerted through or movement of the actuator element.
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