Motor-driven surgical cutting and fastening instrument with loading force feedback
First Claim
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1. A surgical cutting and fastening instrument comprising:
- an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly;
an electric motor for actuating the gear drive train; and
a firing trigger for actuating the motor and connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experience by the cutting instrument in the end effector.
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Abstract
A surgical cutting and fastening instrument is disclosed. According to various embodiments, the instrument includes an end effector, a main drive shaft assembly, and a handle. The handle comprises a gear drive train connected to the main drive shaft assembly, a motor for actuating the gear drive train, and a firing trigger. Retraction of the firing trigger actuates the motor. Further, the firing trigger is connected to the gear drive train such that the loading force applied to the firing trigger is related to the loading force experienced by the cutting instrument in the end effector.
328 Citations
28 Claims
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1. A surgical cutting and fastening instrument comprising:
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an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly;
an electric motor for actuating the gear drive train; and
a firing trigger for actuating the motor and connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experience by the cutting instrument in the end effector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 21, 22, 24)
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17. A surgical cutting and fastening instrument comprising:
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an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly;
an electric motor for actuating the gear drive train;
a firing trigger for actuating the motor, wherein the firing trigger is connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experienced by the cutting instrument;
a run motor sensor for sensing retracting of the firing trigger, wherein, when retraction of the firing trigger is sensed by the run motor sensor, the motor is signaled to forward rotate to cause cutting of the object positioned in the end effector by the cutting instrument;
a reverse motor sensor for sensing an end of a cutting stroke of the cutting instrument such that when the reverse motor sensor senses the end of the cutting stroke, the motor is signaled to reverse rotate to retract the cutting instrument; and
a stop motor sensor for sensing retraction of the cutting instrument such that when the stop motor sensor senses retraction of the cutting instrument, the motor is signaled to stop rotating. - View Dependent Claims (18, 19, 23)
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20. A surgical cutting and fastening instrument comprising:
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an end effector comprising a cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a motor for actuating the main drive shaft assembly via a gear drive train;
a firing trigger for actuating the motor; and
means for applying a loading force to the firing trigger such that the loading force on the firing trigger is related to the loading force experienced by the cutting instrument.
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25. A surgical cutting and fastening instrument comprising:
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an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly, wherein the gear drive train comprises a helical gear drum and a ring threaded on the helical gear drum;
a motor for actuating the gear drive train;
a firing trigger for actuating the motor and connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experience by the cutting instrument in the end effector; and
an arm connecting the firing trigger to the ring of the gear drive train.
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26. A surgical cutting and fastening instrument comprising:
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an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly;
a motor for actuating the gear drive train;
a firing trigger for actuating the motor and connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experience by the cutting instrument in the end effector; and
a run motor sensor for sensing retracting of the firing trigger, wherein, when retraction of the firing trigger is sensed by the run motor sensor, the motor is signaled to forward rotate to cause cutting of the object positioned in the end effector by the cutting instrument, wherein the run motor sensor comprises an on/off switch.
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27. A surgical cutting and fastening instrument comprising:
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an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
a main drive shaft assembly connected to the end effector; and
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly;
a motor for actuating the gear drive train; and
a firing trigger for actuating the motor and connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experience by the cutting instrument in the end effector, wherein the firing trigger includes a gear portion, and wherein the gear drive train comprises a gear box assembly between the motor and the main drive shaft assembly, wherein the gear portion of the firing trigger is geared into a gear of the gear box assembly.
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28. A surgical cutting and fastening instrument comprising:
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an end effector comprising a moveable cutting instrument for cutting an object positioned in the end effector;
wherein the end effector comprises;
an elongate channel for carrying the cutting instrument; and
a clamping member pivotably connected to the elongate channel a main drive shaft assembly connected to the end effector;
a handle connected to the main drive shaft assembly, wherein the handle comprises;
a gear drive train connected to the main drive shaft assembly;
a motor for actuating the gear drive train;
a firing trigger for actuating the motor and connected to the gear drive train such that the loading force on the firing trigger is related to the loading force experience by the cutting instrument in the end effector;
a closure trigger, separate from the firing trigger, wherein retraction of the closure trigger causes the end effector to clamp the object positioned in the end effector; and
a mechanical closure system for closing the end effector when the closure trigger is retracted, wherein the mechanical closure system includes;
a yoke connected to the closure trigger;
a closure bracket connected to the yoke; and
a closure tube disposed in the closure bracket and connected to the clamping member, wherein retraction of the closure trigger causes the closure tube to move longitudinally such that the clamping member pivots to a clamped position.
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Specification