Surgical stapler with firing lock mechanism
First Claim
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1. A surgical stapler comprising:
- a shaft extending along a longitudinal axis having a proximal end and a distal end, a first jaw and a second jaw extending from the distal end of the shaft, the second jaw arranged to receive a staple cartridge having a plurality of staples and movable along the longitudinal axis towards the first jaw;
an actuator coupled to the proximal end of the shaft; and
a staple pusher coupled to the actuator and movable along the longitudinal axis to push the plurality of staples out of the cartridge along the longitudinal axis, the staple pusher having a distal portion and a proximal portion, the distal portion being pivotably connected to the proximal portion, the distal portion of the staple pusher having a first position and a second position, wherein when the distal portion of the staple pusher is in the first position movement of the staple pusher towards the first jaw is prevented;
wherein the shaft comprises a cartridge support having a proximal end and a distal end being the second jaw, the proximal end having a first, second and third slots and a latch movable perpendicular to the longitudinal axis to be positioned sequentially in each of the first, second and third slots.
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Abstract
A surgical stapler is provided that maintains the jaws of the stapler in an open position and prevents firing of staples when a cartridge is not loaded in one of the jaws. Distinct positioning and sequencing of the jaws, capture pin and firing of the staples are provided by a latch mechanism. Such locking and latching mechanisms ensure proper operation of the stapler.
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Citations
12 Claims
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1. A surgical stapler comprising:
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a shaft extending along a longitudinal axis having a proximal end and a distal end, a first jaw and a second jaw extending from the distal end of the shaft, the second jaw arranged to receive a staple cartridge having a plurality of staples and movable along the longitudinal axis towards the first jaw; an actuator coupled to the proximal end of the shaft; and a staple pusher coupled to the actuator and movable along the longitudinal axis to push the plurality of staples out of the cartridge along the longitudinal axis, the staple pusher having a distal portion and a proximal portion, the distal portion being pivotably connected to the proximal portion, the distal portion of the staple pusher having a first position and a second position, wherein when the distal portion of the staple pusher is in the first position movement of the staple pusher towards the first jaw is prevented; wherein the shaft comprises a cartridge support having a proximal end and a distal end being the second jaw, the proximal end having a first, second and third slots and a latch movable perpendicular to the longitudinal axis to be positioned sequentially in each of the first, second and third slots. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A surgical stapler comprising:
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a shaft extending along a longitudinal axis having a proximal end and a distal end, a first jaw and a second jaw extending from the distal end of the shaft, the second jaw arranged to receive a staple cartridge having a plurality of staples and the second jaw being movable towards the first jaw along the longitudinal axis; an actuator coupled to the proximal end of the shaft; a staple pusher coupled to the actuator and movable along the longitudinal axis to push the plurality of staples out of the cartridge along the longitudinal axis; and means for preventing longitudinal movement of the staple pusher, whereby longitudinal movement of the staple pusher is prevented when one of no cartridge is present in the second jaw and no staples are present in the cartridge occurs, wherein the means for preventing longitudinal movement of the staple pusher comprise a distal portion of the staple pusher pivotally connected to a proximal portion of the staple pusher.
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9. A surgical stapler comprising:
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a shaft extending along a longitudinal axis having a proximal end and a distal end, a first jaw and a second jaw extending from the distal end of the shaft, the second jaw arranged to receive a staple cartridge having a plurality of staples and the second jaw being movable towards the first jaw along the longitudinal axis; an actuator coupled to the proximal end of the shaft; a staple pusher coupled to the actuator and movable along the longitudinal axis to push the plurality of staples out of the cartridge along the longitudinal axis; and means for preventing longitudinal movement of the staple pusher, whereby longitudinal movement of the staple pusher is prevented when one of no cartridge is present in the second jaw and no staples are present in the cartridge occurs, wherein the means for preventing longitudinal movement of the staple pusher comprise a pivotable latch connected to a pair of frame supports, the frame supports having a distal end connected to an anvil and a proximal end connected to the actuator. - View Dependent Claims (10)
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11. A surgical stapler comprising:
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a shaft extending along a longitudinal axis having a proximal end and a distal end, a first jaw and a second jaw extending from the distal end of the shaft, the second jaw arranged to receive a staple cartridge having a plurality of staples and the second jaw being movable towards the first jaw along the longitudinal axis; an actuator coupled to the proximal end of the shaft; a staple pusher coupled to the actuator and movable along the longitudinal axis to push the plurality of staples out of the cartridge along the longitudinal axis; and means for preventing longitudinal movement of the staple pusher, whereby longitudinal movement of the staple pusher is prevented when one of no cartridge is present in the second jaw and no staples are present in the cartridge occurs, wherein the means for preventing longitudinal movement of the staple pusher comprise a pivotable latch connected to the second jaw, the second jaw having a slot and the pivotable latch having a projection movable within the slot, the slot positioned perpendicular to the longitudinal axis of the second jaw. - View Dependent Claims (12)
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Specification