Motorized surgical instrument

• US 10,420,549 B2
• Filed: 09/23/2016
• Issued: 09/24/2019
• Est. Priority Date: 09/23/2008
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon, LLC (Johnson & Johnson)
• Inventors: Yates, David C., Huitema, Thomas W., Shelton, IV, Frederick E.
• Primary Examiner(s): Szpira, Julie A
• Application Number:
  US15/274,435
• Publication Number:
  US 20170007238A1
• Time in Patent Office: 1,096 Days
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/07271 characterised by its cartridge
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2017/2923 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments
• CPC Class Codes: H02J 2310/23 The load being a medical device, a medical implant, or a life supporting device
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence

Abstract

A surgical cutting and fastening instrument that is motorized. The instrument comprises in one embodiment a charge accumulator device, separate from a battery, that provides additional power to the motor under certain conditions. In addition, the motor may comprise multiple windings.

Claims

1. A surgical instrument, comprising:

a handle;

an electric motor positioned within the handle;

a power source comprising a rechargeable single cell battery electrically connectable to the electric motor, wherein the power source is positioned within the handle and is configured to supply a first maximum voltage of the power source to the electric motor;

a shaft assembly coupled to the handle;

an end effector coupled to the shaft assembly; and

a circuit positioned within the handle, wherein the circuit comprises a first switching device and a second switching device, and wherein the circuit is configured to increase a magnitude of the first maximum voltage supplied by the power source to a higher voltage and apply the higher voltage to the electric motor to drive at least one of the following;

a clamping system coupled to the electric motor; and

a firing system coupled to the electric motor.

2. The surgical instrument of claim 1, wherein the electric motor comprises a cordless electric motor.

3. The surgical instrument of claim 2, wherein the power source comprises a replaceable power source.

4. The surgical instrument of claim 1, wherein the circuit comprises a charge accumulator device electrically connectable in series with the power source.

5. The surgical instrument of claim 4, wherein the charge accumulator device comprises a capacitor.

6. The surgical instrument of claim 4, wherein the circuit further comprises a switching device electrically connected to the power source and the charge accumulator device.

7. The surgical instrument of claim 1, wherein the surgical instrument further comprises at least one of the following:

the clamping system; and

the firing system.

8. The surgical instrument of claim 1, further comprising a replaceable staple cartridge supported by the end effector.

9. A surgical instrument, comprising:

a handle;

an electric motor positioned within the handle;

a primary power source configured to supply a first maximum voltage of the primary power source to the electric motor, wherein the primary power source is positioned within the handle;

a drive member couplable to the electric motor; and

a voltage step up circuit electrically connectable to the primary power source and the electric motor, wherein the voltage step up circuit comprises a first switching device and a second switching device, and wherein the voltage step-up circuit is positioned within the handle and is configured to;

increase the first maximum voltage supplied by the primary power source to a stepped up voltage; and

apply the stepped up voltage to the electric motor to actuate the drive member.

10. The surgical instrument of claim 9, wherein the primary power source comprises a single cell battery.

11. The surgical instrument of claim 10, wherein the single cell battery comprises a rechargeable single cell battery.

12. The surgical instrument of claim 9, wherein the voltage step up circuit comprises a supplemental power source electrically connectable in series with the primary power source.

13. The surgical instrument of claim 12, wherein the supplemental power source is configured to supply a second voltage.

14. The surgical instrument of claim 12, wherein the supplemental power source comprises a charge accumulator device.

15. A surgical instrument, comprising:

a handle;

an electric motor;

a battery configured to supply a first maximum voltage of the battery to the electric motor;

a firing member couplable to the electric motor;

means for increasing the first maximum voltage supplied by the battery to a second voltage, wherein the means for increasing comprises a first switching device and a second switching device; and

means for applying the second voltage to the electric motor to drive the firing member.

16. The surgical instrument of claim 15, wherein the electric motor and the battery are positioned within the handle.

17. The surgical instrument of claim 15, wherein the battery comprises a single cell battery.

18. The surgical instrument of claim 17, wherein the single cell battery comprises a rechargeable single cell battery.

19. The surgical instrument of claim 15, wherein the means for increasing the first voltage to the second voltage comprises a power source electrically connectable in series with the battery.

20. The surgical instrument of claim 19, wherein the power source comprises a charge accumulator device.