Surgical instrument having a multiple rate directional switching mechanism
First Claim
1. A surgical instrument, comprising:
- a handle;
a firing drive, comprising;
a firing trigger operably coupled to said handle, wherein said firing drive is configured to generate a rotary firing motion upon a first actuation of said firing trigger and a rotary retraction motion upon an other actuation of said firing trigger;
a first drive member, wherein said firing trigger is selectively engageable with said first drive member; and
a second drive member, wherein said firing trigger is selectively engageable with said second drive member;
an elongate shaft assembly coupled to said handle, wherein said elongate shaft assembly is operably engaged with said first drive member and said second drive member; and
an end effector coupled to said elongate shaft assembly, said end effector comprising;
an elongate channel configured to operably support a staple cartridge therein;
an anvil movably coupled to said elongate channel; and
a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly, wherein, when said firing trigger is engaged with said first drive member, said first actuation advances said cutting member a first distance, wherein, when said firing trigger is engaged with said second drive member, said other actuation retracts said cutting member a second distance, and wherein said second distance is greater than said first distance.
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0 Petitions
Accused Products
Abstract
A surgical instrument including a drive mechanism configured to advance a staple driver and/or cutting member at a first rate and retract the staple driver and/or cutting member at a different rate. In at least one embodiment, the rate at which the driver and cutting member is advanced and/or retracted is the distance that the driver and/or cutting member is translated per actuation of a trigger, for example. In various embodiments, the cutting member can be retracted at a faster rate as compared to the rate in which it is advanced. In such embodiments, the surgical instrument can, owing to the slower advancing rate, provide a greater torque or advancing force to the cutting member while, owing to the faster retracting rate, reduce the time required for the surgeon to retract the cutting member.
259 Citations
22 Claims
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1. A surgical instrument, comprising:
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a handle; a firing drive, comprising; a firing trigger operably coupled to said handle, wherein said firing drive is configured to generate a rotary firing motion upon a first actuation of said firing trigger and a rotary retraction motion upon an other actuation of said firing trigger; a first drive member, wherein said firing trigger is selectively engageable with said first drive member; and a second drive member, wherein said firing trigger is selectively engageable with said second drive member; an elongate shaft assembly coupled to said handle, wherein said elongate shaft assembly is operably engaged with said first drive member and said second drive member; and an end effector coupled to said elongate shaft assembly, said end effector comprising; an elongate channel configured to operably support a staple cartridge therein; an anvil movably coupled to said elongate channel; and a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly, wherein, when said firing trigger is engaged with said first drive member, said first actuation advances said cutting member a first distance, wherein, when said firing trigger is engaged with said second drive member, said other actuation retracts said cutting member a second distance, and wherein said second distance is greater than said first distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A surgical instrument, comprising:
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a handle; a firing drive, comprising; a firing trigger operably coupled to said handle, wherein said firing drive is configured to generate a firing motion upon a first actuation of said firing trigger and a retraction motion upon an other actuation of said firing trigger; a first ratchet assembly, comprising; a first ratchet wheel having a plurality of ratchet teeth; and a first pawl pivotably connected to said firing trigger, wherein said first pawl is selectively engageable with said ratchet teeth of said first ratchet wheel; and a second ratchet assembly, comprising; a second ratchet wheel having a plurality of ratchet teeth; and a second pawl pivotably connected to said firing trigger, wherein said second pawl is selectively engageable with said ratchet teeth of said second ratchet wheel; an elongate shaft assembly coupled to said handle, wherein said elongate shaft assembly is operably engaged with said first ratchet wheel and said second ratchet wheel; and an end effector coupled to said elongate shaft assembly, said end effector comprising; an elongate channel configured to operably support a staple cartridge therein; an anvil movably coupled to said elongate channel; and a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly, wherein, when said firing trigger is engaged with said first ratchet wheel, said first actuation advances said cutting member a first distance, wherein, when said firing trigger is engaged with said second ratchet wheel, said other actuation retracts said cutting member a second distance, and wherein said second distance is greater than said first distance. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A surgical instrument, comprising:
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a handle; a firing drive, comprising; a firing trigger operably coupled to said handle; a drive shaft operably engaged with said firing trigger, wherein an actuation of said firing trigger rotates said drive shaft about an axis; an elongate shaft assembly; a transmission, wherein said transmission is configurable in a first configuration for rotating said elongate shaft assembly about an axis in a first direction and a second configuration for rotating said elongate shaft assembly about said axis in a direction opposite said first direction, said transmission comprising a pinion gear, wherein said drive shaft mated with said elongate shaft assembly in said first configuration, and wherein said drive shaft and said elongate shaft assembly are mated with said pinion gear in said second configuration; and an end effector coupled to said elongate shaft assembly, said end effector comprising; an elongate channel configured to operably support a staple cartridge therein; an anvil movably coupled to said elongate channel; and a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly, wherein, when said transmission is in said first configuration, said actuation advances said cutting member a first distance, wherein, when said transmission is in said second configuration, said actuation retracts said cutting member a second distance, and wherein said second distance is greater than said first distance. - View Dependent Claims (22)
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Specification