Robotic surgical assemblies and electrosurgical instruments thereof
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United States of America Patent
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Jul 28, 2020
Grant Date -
Jan 11, 2018
app pub date -
Jan 20, 2016
filing date -
Feb 16, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An actuation mechanism for actuating an electrosurgical end effector includes a housing and a shaft assembly extending distally from the housing. The shaft assembly includes an elongate collar, a shaft extending through the elongate collar, and a longitudinal bar axially movable relative to the shaft. The elongate collar has an internal threadform extending along a length thereof. The longitudinal bar includes a proximal end having an extension engaged to the internal threadform of the elongate collar and a distal end configured to be coupled to a knife blade of an electrosurgical end effector. Rotation of the elongate collar axially moves the longitudinal bar relative to the elongate collar to move the knife blade.
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