최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0020053 (2011-02-03) |
등록번호 | US-8196796 (2012-06-12) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 507 인용 특허 : 1109 |
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 retrac
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.
1. A surgical instrument comprising: an end effector having a selectively reciprocatable implement movably supported therein, said implement being selectively advanceable in a distal direction upon application of a rotary actuation motion thereto and retractable in a proximal direction upon applicat
1. A surgical instrument comprising: an end effector having a selectively reciprocatable implement movably supported therein, said implement being selectively advanceable in a distal direction upon application of a rotary actuation motion thereto and retractable in a proximal direction upon application of a rotary retraction motion thereto;an elongate shaft assembly coupled to said end effector and including a rotatable drive shaft operably engaged with said reciprocatable implement for transmitting said rotary actuation motion and rotary retraction motion thereto, said rotatable drive shaft including a first gear and a second gear; anda firing drive comprising: a first rotary drive member including a plurality of first gear teeth selectivelyinterfacing with said first gear to apply said rotary actuation motion thereto when activated; and a second rotary drive member including a plurality of second gear teethoperably engaged with said second gear to apply said rotary retraction motion thereto when said first rotary drive member is deactivated and said second rotary drive member is activated. 2. The surgical instrument of claim 1 wherein said end effector comprises: an elongate channel configured to operably support a staple cartridge therein; andan anvil movably coupled to said elongate channel and wherein said reciprocatable implement comprises a cutting member operably supported within said elongate channel. 3. The surgical instrument of claim 2, further comprising a closure drive configured to selectively generate a closing motion and an opening motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said opening motion and said closing motion. 4. The surgical instrument of claim 1, wherein said drive shaft defines an axis, wherein said first rotary drive member is positioned on a first side of said axis and is configured to rotate said drive shaft about said axis in a first direction, and wherein said second rotary drive member is positioned on a second side of said axis to rotate said drive shaft about said axis in a second direction, wherein said second direction is opposite said first direction. 5. The surgical instrument of claim 1 wherein said end effector comprises: an elongate channel configured to operably support a staple cartridge therein; andan anvil movably coupled to said elongate channel and wherein said reciprocatable implement comprises a cutting member operably supported within said elongate channel. 6. The surgical instrument of claim 5 further comprising a closure drive configured to selectively generate a closing motion and an opening motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said opening motion and said closing motion. 7. A surgical instrument, comprising: an end effector having a selectively reciprocatable implement movably supported therein and being selectively advanceable in a distal direction upon application of a rotary actuation motion thereto and retractable in a proximal direction upon application of a rotary retraction motion thereto;an elongate shaft assembly coupled to said end effector and configured to transmit said rotary actuation motion and rotary retraction motion to said reciprocatable implement; anda firing drive interfacing with said elongate shaft to apply said rotary actuation and rotary retraction motions thereto, said firing drive comprising: a first ratchet assembly, comprising: a first ratchet wheel having a plurality of ratchet teeth; anda first pawl pivotably connected to an actuator device, wherein said first pawl is selectively engageable with said ratchet teeth of said first ratchet wheel to apply said rotary actuation motion to said elongate shaft; anda second ratchet assembly, comprising: a second ratchet wheel having a plurality of ratchet teeth; anda second pawl pivotably connected to said actuator device, wherein said second pawl is selectively engageable with said ratchet teeth of said second ratchet wheel to apply said rotary retraction motion to said elongate shaft. 8. The surgical instrument of claim 7, further comprising: a first spring configured to effect ratcheting engagement between said first pawl and said ratchet teeth of said first ratchet wheel; anda second spring configured to effect ratcheting engagement between said second pawl and said ratchet teeth of said second ratchet wheel. 9. The surgical instrument of claim 8, wherein said drive shaft defines an axis, wherein said first ratchet wheel is positioned on a first side of said axis and is configured to rotate said drive shaft about said axis in a first direction, and wherein said second ratchet wheel is positioned on a second side of said axis to rotate said drive shaft about said axis in a second direction, wherein said second direction is opposite said first direction. 10. The surgical instrument of claim 7, wherein said first ratchet wheel further includes a plurality of first gear teeth positioned about a first diameter, wherein said second ratchet wheel includes a plurality of second gear teeth positioned about a second diameter, wherein said second diameter is greater than said first diameter, wherein said elongate shaft assembly includes a rotatable drive shaft operably engaged with said cutting member, and wherein said drive shaft includes a first gear operably engaged with said first gear teeth and a second gear operably engaged with said second gear teeth. 11. The surgical instrument of claim 7, further comprising: a frame;a slidable member mounted to said first pawl and said second pawl; anda spring operably engaged with said slidable member and said frame, and wherein said spring is configured to motivate said slidable member such that either said first pawl is engaged with said first ratchet wheel or said second pawl is engaged with said second ratchet wheel. 12. The surgical instrument of claim 7, wherein, when said first pawl is engaged with said first ratchet wheel, said second pawl is not engaged with said second ratchet wheel, and wherein, when said second pawl is engaged with said second ratchet wheel, said first pawl is not engaged with said first ratchet wheel. 13. The surgical instrument of claim 7, wherein said first pawl can be engaged with said first ratchet wheel at the same time as said second pawl is engaged with said second ratchet wheel such that said firing drive is prevented from generating said rotary firing motion and said rotary retraction motion. 14. A surgical instrument, comprising: an end effector having a selectively reciprocatable implement member movably supported therein and being selectively advanceable in a distal direction upon application of a rotary actuation motion thereto and is retractable in a proximal direction upon application of a rotary retraction motion thereto;an elongate shaft assembly comprising: an output shaft coupled to said end effector and configured to transmit said rotary actuation motion and rotary retraction motion to said reciprocatable implement;a first input shaft; anda second input shaft movable relative to said first input shaft and wherein said surgical instrument further comprises:a transmission configurable in a first configuration for facilitating rotation of said output shaft about an axis in a first direction and a second configuration for rotating said output shaft about said axis in a direction opposite said first direction, said transmission comprising a switching mechanism communicating with said first and second input shafts such that when said switching mechanism is in a first position, rotation of said first input shaft is transferred to said output shaft and when said switching mechanism is in a second position, rotation of said second input shaft is transferred to said output shaft. 15. The surgical instrument of claim 14 wherein said end effector comprises: an elongate channel configured to operably support a staple cartridge therein; andan anvil movably coupled to said elongate channel and wherein said reciprocatable implement comprises a cutting member operably supported within said elongate channel. 16. The surgical instrument of claim 15, further comprising a closure drive configured to selectively generate a closing motion and an opening motion, wherein said anvil is operably engaged with said closure drive and is movably responsive to said opening motion and said closing motion. 17. The surgical instrument of claim 14 wherein said transmission further comprises pinion gears in meshing engagement with said first input shaft. 18. The surgical instrument of claim 17 wherein said switching mechanism further comprises an output gear operably interfacing with said output shaft and configured for selective meshing engagement with said pinion gears. 19. The surgical instrument of claim 18 wherein said transmission further comprises an input gear operably coupled to said second input shaft and wherein said second input shaft is axially movable relative to said first input shaft such that when said second input shaft is in said first position, said pinion gears are in meshing engagement with said output gear and when said second input shaft is in said second position, said pinion gears are disengaged from said output gear and said input gear is in meshing engagement with said output gear such that rotation of said second input shaft relative to said first input shaft is transferred to said output gear.
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