Actuation lockout for a surgical instrument
AssigneeC.R. Bard, Inc.
InventorsKEVIN J. RANUCCI, Nathan Stewart Cauldwell, Donald E. Ziniti
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Abstract
Embodiments of a surgical instrument including an actuation lockout system as well as its method of use are disclosed. In one embodiment, a surgical instrument includes a trigger and a driveshaft coupled to the trigger such that actuation of the trigger causes the driveshaft to move from a first position to a second position, thereby resulting in deployment of a surgical fastener. An actuation lockout system restrains distal movement of the driveshaft until a force greater than or equal to a threshold force is applied to the trigger.
Claims28
A surgical instrument comprising:
- a power transmission including a trigger and a driveshaft operatively coupled to the trigger, wherein actuation of the trigger moves the driveshaft between at least a first position and a second position;
- a first camming surface associated with a portion of the power transmission;
- a second camming surface arranged to block movement of the first camming surface in a locked configuration and permit movement of the first camming surface in an unlocked configuration;
- a third camming surface associated with the driveshaft, wherein the second camming surface applies a distally directed force to the third camming surface when the second camming surface is in an unlocked configuration, wherein at least one of the first camming surface and the second camming surface is biased towards the locked configuration.
A surgical instrument comprising:
- a power transmission including a trigger and a driveshaft operatively coupled to the trigger, wherein actuation of the trigger moves the driveshaft between at least a first position and a second position;
- a first camming surface associated with a portion of the power transmission, wherein the first camming surface has a curved shape;
- a second camming surface arranged to block movement of the first camming surface in a locked configuration and permit movement of the first camming surface in an unlocked configuration, wherein the second camming surface includes a roller, and wherein the second camming surface is biased towards the locked configuration against the first camming surface.
A surgical instrument comprising:
- a power transmission including a trigger and a driveshaft operatively coupled to the trigger, wherein actuation of the trigger moves the driveshaft between at least a first position and a second position;
- a first camming surface associated with the driveshaft;
- a second camming surface;
- a third camming surface associated with the driveshaft and located proximally relative to the first camming surface, wherein the third camming surface slopes towards a proximal end of the driveshaft, and wherein as the driveshaft moves from the first position to the second position the second camming surface cams out of contact with the first camming surface and into contact with the third camming surface to permit movement of the driveshaft.
Dependencies are inferred from the claim text.