Robotic surgical assemblies and electrosurgical instruments thereof
AssigneeCovidien LP
InventorBrock Kopp
Life of this patent
Estimating the term…
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.
Claims22
An actuation mechanism for actuating an electrosurgical end effector, comprising:
- a housing;
- and
- a shaft assembly extending distally from the housing, the shaft assembly including:
- an elongate collar having an internal threadform extending along a length thereof;
- a shaft extending through the elongate collar and having a proximal end and a distal end configured to effectuate movement of a jaw member of an electrosurgical end effector upon axial movement of the shaft relative to the housing;
- and
- a longitudinal bar axially movable relative to the shaft and including:
- 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;
- wherein rotation of the elongate collar axially moves the longitudinal bar relative to the elongate collar to move the knife blade.
An electrosurgical instrument, comprising:
- an end effector including:
- a pair of opposing jaw members configured to grasp and seal a tissue disposed therebetween;
- and
- a knife blade movably disposable between the pair of opposing jaw members to sever the tissue disposed therebetween;
- and
- an actuation mechanism including:
- a housing;
- and
- a shaft assembly extending distally from the housing, the shaft assembly including:
- an elongate collar having an internal threadform extending along a length thereof;
- a shaft extending through the elongate collar and having a proximal end and a distal end in operative communication with one of the pair of opposing jaw members such that movement of the shaft relative to the housing approximates or expands the pair of opposing jaw members;
- and
- a longitudinal bar axially movable relative to the shaft and including:
- a proximal end having an extension engaged to the internal threadform of the elongate collar;
- and
- a distal end coupled to the knife blade;
- wherein rotation of the elongate collar axially moves the longitudinal bar relative to the elongate collar to move the knife blade.
A robotic surgical assembly, comprising:
- a surgical robotic arm;
- an end effector including:
- a pair of opposing jaw members configured to grasp and seal a tissue disposed therebetween;
- and
- a knife blade movably disposable between the pair of opposing jaw members to sever the tissue disposed therebetween;
- and
- an actuation mechanism configured to be coupled to the surgical robotic arm, the actuation mechanism including:
- a housing including:
- a first drive member;
- and
- a second drive member;
- and
- a shaft assembly extending distally from the housing, the shaft assembly including:
- an elongate collar operatively coupled to the first drive member and having an internal threadform extending along a length thereof;
- a shaft extending through the elongate collar and having a proximal end operatively coupled to the second drive member and a distal end in operative communication with one of the pair of opposing jaw members such that movement of the shaft relative to the housing via rotation of the second drive member approximates or expands the pair of opposing jaw members;
- and
- a longitudinal bar axially movable relative to the shaft and including:
- a proximal end having an extension engaged to the internal threadform of the elongate collar;
- and
- a distal end coupled to the knife blade;
- wherein rotation of the elongate collar via rotation of the first drive member axially moves the longitudinal bar relative to the elongate collar to move the knife blade.
Dependencies are inferred from the claim text.