Surgical stapling instruments
First Claim
1. A surgical instrument, comprising:
- an end effector, comprising;
a channel configured to receive a staple cartridge; and
a cutting member operably supported within said channel; and
a firing drive, comprising;
a trigger;
a firing member operably engaged with said cutting member;
a pawl, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein said pawl is engaged with said firing member when said pawl is in said second position; and
a pawl pin operably engaged with said trigger and said pawl, wherein, upon an actuation of said trigger, said trigger is configured to advance said pawl pin and said pawl toward said end effector and, when said pawl is in said second position, said pawl is configured to advance said firing member toward said end effector,wherein said firing drive further includes a tilter mechanism operably engaged with said pawl, wherein said tilter mechanism includes a cam, wherein said pawl is configured to contact said cam when said pawl is advanced by said trigger, and wherein said cam is configured to rotate said pawl into said second position.
4 Assignments
0 Petitions
Accused Products
Abstract
A surgical instrument including a shaft, an end effector movable relative to the shaft, a locking mechanism configured to engage the shaft and/or end effector to fix the relative relationship between the shaft and end effector, and a closure system configured to close the end effector and engage the locking mechanism to prevent it from becoming unlocked. The instrument can further include a firing drive comprising a trigger, a firing member, and a pawl, where the pawl is rotatable between a first position in which the pawl is disengaged from the firing member and a second position in which the trigger can advance the pawl and firing member toward the end effector. The instrument can also include a reel, a band, where the band can be wound around the reel to retract the firing member, and a return mechanism for selectively engaging the trigger with the firing member and the reel.
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Citations
44 Claims
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1. A surgical instrument, comprising:
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an end effector, comprising; a channel configured to receive a staple cartridge; and a cutting member operably supported within said channel; and a firing drive, comprising; a trigger; a firing member operably engaged with said cutting member; a pawl, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein said pawl is engaged with said firing member when said pawl is in said second position; and a pawl pin operably engaged with said trigger and said pawl, wherein, upon an actuation of said trigger, said trigger is configured to advance said pawl pin and said pawl toward said end effector and, when said pawl is in said second position, said pawl is configured to advance said firing member toward said end effector, wherein said firing drive further includes a tilter mechanism operably engaged with said pawl, wherein said tilter mechanism includes a cam, wherein said pawl is configured to contact said cam when said pawl is advanced by said trigger, and wherein said cam is configured to rotate said pawl into said second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A surgical instrument, comprising:
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a frame; an end effector, comprising; a channel configured to receive a staple cartridge; and a cutting member operably supported within said channel; and a firing drive, comprising; a trigger; a firing member operably engaged with said cutting member; a pawl operably engaged with said trigger, wherein said trigger is configured to advance said pawl relative to said frame, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein, when said pawl is in said second position, said pawl is configured to engage said firing member and advance said firing member toward said end effector; and a tilter mechanism operably engaged with said pawl, wherein said tilter mechanism includes a cam, wherein said pawl is configured to contact said cam when said pawl is advanced by said trigger, and wherein said cam is configured to rotate said pawl into said second position. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A surgical instrument, comprising:
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a staple cartridge attachment portion; and a firing drive, comprising; a trigger; a firing member; a pawl, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein said pawl is engaged with said firing member when said pawl is in said second position; a pawl pin operably engaged with said trigger and said pawl, wherein, upon an actuation of said trigger, said trigger is configured to advance said pawl pin and said pawl toward said staple cartridge attachment portion and, when said pawl is in said second position, said pawl is configured to advance said firing member toward said staple cartridge attachment portion; and a tilter mechanism operably engaged with said pawl, wherein said tilter mechanism includes a cam, wherein said pawl is configured to contact said cam when said pawl is advanced by said trigger, and wherein said cam is configured to rotate said pawl into said second position. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A surgical instrument, comprising:
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a frame; a staple cartridge attachment portion; and a firing drive, comprising; a trigger; a firing member; a pawl operably engaged with said trigger, wherein said trigger is configured to advance said pawl relative to said frame, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein, when said pawl is in said second position, said pawl is configured to engage said firing member and advance said firing member toward said staple cartridge attachment portion; and a tilter mechanism operably engaged with said pawl, wherein said tilter mechanism includes a cam, wherein said pawl is configured to contact said cam when said pawl is advanced by said trigger, and wherein said cam is configured to rotate said pawl into said second position. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A surgical instrument, comprising:
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a frame; a staple cartridge attachment portion; and a firing drive, comprising; a trigger; a firing member; a pawl operably engaged with said trigger, wherein said trigger is configured to advance said pawl relative to said frame, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein, when said pawl is in said second position, said pawl is configured to engage said firing member and advance said firing member toward said staple cartridge attachment portion; and a camming mechanism, wherein said pawl is configured to contact said camming mechanism when said pawl is advanced by said trigger, and wherein said camming mechanism is configured to rotate said pawl into said second position. - View Dependent Claims (35, 36, 37, 38, 39)
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40. A surgical instrument, comprising:
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a frame comprising a slot having a sidewall; a staple cartridge attachment portion; and a firing drive, comprising; a trigger; a firing member; a pawl operably engaged with said trigger, wherein said trigger is configured to advance said pawl relative to said frame, wherein said pawl is rotatable between a first position and a second position relative to said firing member, and wherein, when said pawl is in said second position, said pawl is configured to engage said firing member and advance said firing member toward said staple cartridge attachment portion; and a tilter mechanism, wherein at least a portion of said tilter mechanism is positioned within said slot and frictionally-engaged with said sidewall, wherein said pawl is configured to contact said tilter mechanism when said pawl is advanced by said trigger, wherein said tilter mechanism is configured to remain stationary upon the application of an initial force by said pawl such that said pawl is rotated into said second position, and wherein said tilter mechanism is configured to slide within said slot upon the application of a subsequent force by said pawl which is larger than said initial force. - View Dependent Claims (41, 42, 43, 44)
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Specification