Motor-driven surgical cutting instrument
First Claim
1. A surgical instrument for cutting and stapling tissue, wherein the surgical instrument comprises:
- a handle comprising;
an electric motor; and
a control system for controlling said electric motor, said control system comprising;
a battery operably coupleable to said electric motor, said battery configured to supply pulses to said electric motor; and
a pulse width modulation circuit operably coupleable to said battery, said pulse width modulation circuit configured to control the duration of pulses supplied from said battery to said electric motor;
a shaft extending from said handle; and
an end effector extending from said shaft, said end effector comprising;
a replaceable staple cartridge comprising a plurality of staples for stapling tissue;
a cutting element for cutting tissue, wherein said cutting element is configured to move at least partially through said end effector during a firing stroke to deploy said staples, wherein said electric motor is configured to drive said cutting element with an applied power during the firing stroke at a firing speed, wherein said pulse width modulation circuit is configured to reduce the speed of said cutting element to below the firing speed at various times during the firing stroke, and wherein the applied power applied to said cutting element is optimized by said pulse width modulation circuit;
a proximal end;
a cartridge lockout mechanism positioned in a lockout region of said end effector, wherein said pulse width modulation circuit is configured to modulate the speed of said cutting element below the firing speed as said cutting element travels within said lockout region; and
a distal end, wherein said pulse width modulation circuit is configured to modulate the speed of said cutting element below the firing speed as said cutting element approaches said distal end.
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0 Petitions
Accused Products
Abstract
In various embodiments, a surgical stapler is disclosed. The stapler comprises a handle, a shaft, and a surgical end effector extending from the shaft. The stapler further comprises a firing member configured to move through a plurality of positions during a firing stroke, an electric motor configured to drive the firing member during the firing stroke, and a control system for controlling the electric motor. The control system comprises a battery and a pulse frequency modulation circuit configured to control the frequency of pulses supplied from the battery to the electric motor, wherein the pulse frequency modulation circuit is configured to optimize the speed applied to the firing member.
3004 Citations
17 Claims
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1. A surgical instrument for cutting and stapling tissue, wherein the surgical instrument comprises:
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a handle comprising; an electric motor; and a control system for controlling said electric motor, said control system comprising; a battery operably coupleable to said electric motor, said battery configured to supply pulses to said electric motor; and a pulse width modulation circuit operably coupleable to said battery, said pulse width modulation circuit configured to control the duration of pulses supplied from said battery to said electric motor; a shaft extending from said handle; and an end effector extending from said shaft, said end effector comprising; a replaceable staple cartridge comprising a plurality of staples for stapling tissue; a cutting element for cutting tissue, wherein said cutting element is configured to move at least partially through said end effector during a firing stroke to deploy said staples, wherein said electric motor is configured to drive said cutting element with an applied power during the firing stroke at a firing speed, wherein said pulse width modulation circuit is configured to reduce the speed of said cutting element to below the firing speed at various times during the firing stroke, and wherein the applied power applied to said cutting element is optimized by said pulse width modulation circuit; a proximal end; a cartridge lockout mechanism positioned in a lockout region of said end effector, wherein said pulse width modulation circuit is configured to modulate the speed of said cutting element below the firing speed as said cutting element travels within said lockout region; and a distal end, wherein said pulse width modulation circuit is configured to modulate the speed of said cutting element below the firing speed as said cutting element approaches said distal end. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A surgical stapler, comprising:
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a handle; a shaft extending from said handle; a surgical end effector extending from said shaft, wherein said surgical end effector comprises a replaceable staple cartridge; a firing member configured to move through a plurality of positions during a firing stroke; an electric motor configured to drive said firing member with a speed during the firing stroke; a control system for controlling said electric motor, said control system comprising; a battery operably engageable with said electric motor, said battery configured to supply pulses to said electric motor; and a pulse width modulation circuit operably engageable with said battery, said pulse width modulation circuit configured to control the duration of pulses supplied from said battery to said electric motor, wherein said pulse width modulation circuit is configured to optimize the speed applied to said firing member from said electric motor; wherein said firing member is configured to move at least partially through said surgical end effector during the firing stroke at a firing speed, wherein said pulse width modulation circuit is configured to reduce the speed of said firing member to below the firing speed at various times during the firing stroke, and wherein said surgical end effector further comprises; a proximal end; a cartridge lockout mechanism positioned in a lockout region, wherein said pulse width modulation circuit is configured to modulate the speed of said firing member below the firing speed as said firing member travels within said lockout region; and a distal end, wherein said pulse width modulation circuit is configured to modulate the speed of said firing member below the firing speed as said firing member approaches said distal end. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A surgical stapler, comprising:
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a handle; a shaft extending from said handle; a surgical end effector extending from said shaft, wherein said surgical end effector comprises a replaceable staple cartridge; a firing member configured to move through a plurality of positions during a firing stroke; an electric motor configured to drive said firing member during the firing stroke; a control system for controlling said electric motor, said control system comprising; a battery operably engageable with said electric motor, said battery configured to supply pulses to said electric motor; a pulse frequency modulation circuit operably engageable with said battery, said pulse frequency modulation circuit configured to control the frequency of pulses supplied from said battery to said electric motor, wherein said pulse frequency modulation circuit is configured to optimize the speed applied to said firing member from said electric motor; wherein said firing member is configured to move at least partially through said surgical end effector during the firing stroke at a firing speed, wherein said pulse frequency modulation circuit is configured to reduce the speed of said firing member to below the firing speed at various times during the firing stroke, and wherein said surgical end effector further comprises; a proximal end; and a distal end, wherein said pulse frequency modulation circuit is configured to modulate the speed of said firing member below the firing speed as said firing member approaches said distal end. - View Dependent Claims (15, 16, 17)
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Specification