Patent ID: 11925428
Assignee: COVIDIEN LP
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B  F

Claim 6:
7. A robotic surgical instrument, comprising:
a housing having a shaft extending therefrom including an end effector assembly at a distal end thereof, the shaft including a drive rod extending therethrough configured to actuate the end effector assembly upon translation thereof;
a spring compression assembly supported within the housing, the spring compression assembly including:
a proximal hub configured to secure a proximal end of the drive rod disposed therethrough, the proximal hub including a plurality of teeth disposed along an inner peripheral surface thereof;
a distal hub spaced from the proximal hub and including a plurality of teeth disposed along an inner peripheral surface thereof; and
a compression spring mounted between the proximal and distal hubs;

a drive gear including a proximal portion extending therefrom including a plurality of threads disposed thereabout configured to matingly engage the corresponding plurality of teeth of the proximal and distal hubs such that rotation thereof translates the proximal and distal hubs relative to one another and actuates the end effector assembly;
a drive input including a drive input shaft having an input gear configured to matingly engage the drive gear such that rotation of the drive input shaft correspondingly rotates the drive gear, the drive input shaft including a mechanical interface disposed thereabout; and
a thumb wheel having at least a portion thereof exposed outside the housing for external manipulation thereof, the thumb wheel including a corresponding mechanical interface disposed about an inner periphery thereof, the mechanical interface of the drive input shaft configured to matingly engage the corresponding mechanical interface of the thumb wheel upon selective translation of the thumb wheel, the thumb wheel selectively translatable between a first, disengaged position spaced relative to the mechanical interface disposed on the drive input shaft and a second, engaged position to matingly engage the thumb wheel with the drive input shaft and allow manual actuation of the end effector assembly.