Surgical instrument soft stop
First Claim
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1. A surgical instrument comprising an electromechanical stop, where the surgical instrument comprises:
- a drive motor;
a drive member movable by the drive motor through a drive stroke between a home position and an end of stroke, the end of stroke extending between a first position and a second position;
a mechanical stop disposed at or near the end of stroke and structured to increase resistance to movement of the drive member through the end of stroke from the first position to the second position; and
a control system configured to detect a current spike associated with the increased resistance, wherein delivery of power to the drive motor is interrupted when the control system detects the current spike.
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Abstract
A surgical instrument includes a drive member movable by a drive motor between a home position and an end of stroke. A mechanical stop is disposed at or near the end of stroke and is structured to increase resistance to movement of the drive member from a first position to a second position. A control system detects a current spike associated with the increased resistance and interrupts power to the drive motor.
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Citations
19 Claims
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1. A surgical instrument comprising an electromechanical stop, where the surgical instrument comprises:
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a drive motor; a drive member movable by the drive motor through a drive stroke between a home position and an end of stroke, the end of stroke extending between a first position and a second position; a mechanical stop disposed at or near the end of stroke and structured to increase resistance to movement of the drive member through the end of stroke from the first position to the second position; and a control system configured to detect a current spike associated with the increased resistance, wherein delivery of power to the drive motor is interrupted when the control system detects the current spike. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mechanical stop for use in a surgical instrument for producing a detectable current spike associated with an electromechanical stop, the mechanical stop comprising:
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one or more bumpers; and one or more resistance members; the mechanical stop disposed at or near an end of stroke associated with a drive stroke of a drive member, wherein the end of stroke extends between a first position and a second position; the bumpers movable from the first position to the second position of the end of stroke and configured to contact the drive member at the first position; the resistance members operatively coupled to the bumpers and configured to increase resistance to movement of the drive member from the first position to the second position to produce the current spike; and wherein the resistance members are configured to decelerate the drive member prior to the drive member driving to the second position. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A surgical instrument, comprising:
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a motor; a drive member movable by the motor between an first position and a second position; a stop member disposed between the first position and the second position, wherein the stop member is configured to resist the movement of the drive member toward the second position; and a control system configured to interrupt delivery of power to the motor when the resistance to the movement of the drive member reaches a resistance threshold. - View Dependent Claims (19)
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Specification