Active braking electrical surgical instrument and method for braking such an instrument
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-017/068
A61B-017/072
A61B-017/115
A61B-017/11
A61B-017/00
A61B-019/00
출원번호
US-0863978
(2013-04-16)
등록번호
US-9713473
(2017-07-25)
발명자
/ 주소
Smith, Kevin W.
Bales, Jr., Thomas O.
Deville, Derek Dee
Rivera, Carlos
Palmer, Matthew A.
출원인 / 주소
Ethicon Endo-Surgery, Inc.
대리인 / 주소
Mayback & Hoffman P.A.
인용정보
피인용 횟수 :
1인용 특허 :
155
초록▼
A surgical instrument includes an end effector, an actuator coupled to the end effector and actuating it, a handle coupled to the end effector and having an electric motor disposed therein actuating the actuator when supplied with power, and a post-termination braking circuit including a power suppl
A surgical instrument includes an end effector, an actuator coupled to the end effector and actuating it, a handle coupled to the end effector and having an electric motor disposed therein actuating the actuator when supplied with power, and a post-termination braking circuit including a power supply switch at the handle. The switch has a break-before-make configuration, a power-supplying state in which power is supplied to the motor, and a power-removed state in which power is not supplied to the motor. The braking circuit short-circuits power to the motor when the switch is in the power-removed state. A method for post-termination braking of the motor utilizes the permanent magnetic field to counteract inertia-induced over-stroke of the motor, drive train, and/or actuation assembly after powered operation by short-circuiting the still-spinning motor to create an electrically generated magnetic field in opposition to the permanent magnetic field upon ceasing supply of power.
대표청구항▼
1. A surgical instrument, comprising: a surgical end effector;at least one actuator mechanically coupled to the end effector for actuating the end effector;a handle: mechanically coupled to the end effector; andhaving an electric motor disposed therein and operable to actuate the at least one actuat
1. A surgical instrument, comprising: a surgical end effector;at least one actuator mechanically coupled to the end effector for actuating the end effector;a handle: mechanically coupled to the end effector; andhaving an electric motor disposed therein and operable to actuate the at least one actuator when the motor is supplied with power;a post-termination braking circuit including a power supply switch at the handle, the power supply switch having: a break-before-make switch configuration;a power-supplying state in which power is supplied to the motor; anda power-removed state in which power is not supplied to the motor,the post-termination braking circuit operable to short-circuit the power supplied to the motor when the power supply switch is in the power-removed state. 2. The surgical instrument according to claim 1, wherein the electric motor includes: power terminals at which the motor is supplied with power; anda drive train operatively coupled to the at least one actuator to actuate the at least one actuator when the motor is supplied with power,wherein the post-termination braking circuit is operable to short-circuit the power terminals of the motor when the power supply switch is in the power-removed state. 3. The surgical instrument according to claim 2, wherein the drive train has a rotational inertia when operating; the motor has: a rotational inertia when spinning; anda permanent magnetic field; andthe post-termination braking circuit is operable to create an electrically-generated magnetic field in opposition to the permanent magnetic field with the rotational inertia of at least one of the drive train and the motor when short-circuiting the power terminals. 4. The surgical instrument according to claim 1, wherein the handle further includes a power supply disposed therein and electrically connected to the motor through the post-termination braking circuit. 5. The surgical instrument according to claim 4, wherein the power supply is a removable battery pack. 6. The surgical instrument according to claim 1, wherein the power supply switch is a three-position switch including: a forward position in which the three-position switch is in the power-supplying state and is configured to cause the motor to rotate in a forward direction;a reverse position in which the three-position switch is in the power-supplying state and is configured to cause the motor to rotate in a reverse direction; andan off position in which the three-position switch is in the power-removed state and the motor is caused to prevent rotation at the motor. 7. The surgical instrument according to claim 1, wherein the power supply switch is a double-pole, double throw switch. 8. The surgical instrument according to claim 1, wherein the end effector, the handle, the motor, the power supply switch, and the post-termination braking circuit are all operable with only a single hand. 9. A method for post-termination braking of an electrical motor in an electrically powered surgical instrument, which comprises: coupling a surgical end effector to a handle, the end effector having at least one actuator to effect a surgical procedure, andthe handle having an electric motor disposed therein;mechanically coupling the motor to the at least one actuator;actuating the at least one actuator by selectively supplying the motor with power with a break-before-make power supply switch of a post-termination braking circuit, the power supply switch having an off state that ceases supply of power to the motor; andupon ceasing supply of power to the motor, short-circuiting power terminals of the still-spinning motor with the off state of the power supply switch. 10. The method according to claim 9, wherein: the step of mechanically coupling the motor to the at least one actuator is carried out by mechanically coupling a drive train of the motor to the at least one actuator;the motor has a permanent magnetic field;at least one of the motor, the drive train, and the at least one actuator has an inertia-induced over-stroke characteristic after powered operation; andthe step of short-circuiting the power terminals of the motor creates an electrically generated magnetic field in opposition to the permanent magnetic field. 11. The method according to claim 10, further comprising counteracting the inertia-induced over-stroke of at least one of the motor, the drive train, and the at least one actuator with the short-circuit. 12. The method according to claim 10, further comprising carrying out the short-circuiting step to slow the still-spinning motor at a rate that substantially eliminates the inertia-induced over-stroke of at least one of the motor, the drive train, and the at least one actuator. 13. The method according to claim 10, further comprising providing a power supply within the handle and electrically connecting the power supply to the motor. 14. The method according to claim 13, wherein the power supply is a removable battery pack. 15. The method according to claim 13, further comprising carrying out the short-circuiting step without short-circuiting the power supply. 16. The method according to claim 10, further comprising: providing a power supply within the handle and electrically connecting the power supply to the motor; andcarrying out the short-circuiting step without short-circuiting the power supply. 17. The method according to claim 10, wherein the break-before-make power supply switch is a double-pole, double throw switch.
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