Ratcheting mechanism for surgical stapling device
First Claim
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1. A method of firing a surgical device comprising:
- moving a handle of the surgical device from an open position toward an actuated position;
engaging rack teeth of a rack of a ratchet mechanism with pawl teeth of a pawl of the ratchet mechanism to prevent the handle from moving back toward the open position;
disengaging the rack teeth from the pawl teeth to allow the handle to move toward the open position by using one of a first method and a second method, wherein the first method includes moving the handle a predetermined distance toward the actuated position such that a cam surface of the rack engages the pawl to disengage the rack teeth from the pawl teeth, and the second method includes engaging an override prior to moving the handle the predetermined distance such that the override disengages the rack teeth from the pawl teeth.
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Abstract
A surgical stapling device comprising a housing, an elongated portion, an end effector, and a movable handle disposed in mechanical cooperation with the housing and movable between a first open position and a second approximated position for affecting a function of the end effector. A ratchet mechanism is disposed in mechanical cooperation with the movable handle and is configured to substantially prevent the movable handle from moving towards its first open position until the movable handle reaches a predetermined position.
116 Citations
14 Claims
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1. A method of firing a surgical device comprising:
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moving a handle of the surgical device from an open position toward an actuated position; engaging rack teeth of a rack of a ratchet mechanism with pawl teeth of a pawl of the ratchet mechanism to prevent the handle from moving back toward the open position; disengaging the rack teeth from the pawl teeth to allow the handle to move toward the open position by using one of a first method and a second method, wherein the first method includes moving the handle a predetermined distance toward the actuated position such that a cam surface of the rack engages the pawl to disengage the rack teeth from the pawl teeth, and the second method includes engaging an override prior to moving the handle the predetermined distance such that the override disengages the rack teeth from the pawl teeth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification