MOTORIZED SURGICAL INSTRUMENT
First Claim
Patent Images
1. A surgical instrument comprising:
- an end effector comprising a movable firing member;
an electric motor for actuating the firing member; and
a motor control circuit for controlling the motor, wherein the motor control circuit comprises;
a power source connected to the motor for electrically powering the motor;
a charge accumulator device; and
a switching circuit connected to the power source and the charge accumulator device, wherein the switching circuit comprises;
a first switch for temporarily connecting the charge accumulator device to the power source not in series to charge the charge accumulator device; and
a second switch for selectively connecting the charge accumulator device in series with the power source to provide additional power to the motor, wherein, when the first switch is temporarily connecting the charge accumulator device to the power source, the second switch is not selectively connecting the charge accumulator device in series with the power source.
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Accused Products
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.
778 Citations
20 Claims
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1. A surgical instrument comprising:
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an end effector comprising a movable firing member; an electric motor for actuating the firing member; and a motor control circuit for controlling the motor, wherein the motor control circuit comprises; a power source connected to the motor for electrically powering the motor; a charge accumulator device; and a switching circuit connected to the power source and the charge accumulator device, wherein the switching circuit comprises; a first switch for temporarily connecting the charge accumulator device to the power source not in series to charge the charge accumulator device; and a second switch for selectively connecting the charge accumulator device in series with the power source to provide additional power to the motor, wherein, when the first switch is temporarily connecting the charge accumulator device to the power source, the second switch is not selectively connecting the charge accumulator device in series with the power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A surgical instrument comprising:
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an end effector comprising a movable firing member; an electric motor for actuating the firing member; a motor control circuit for controlling the motor, wherein the motor control circuit comprises; a power source comprising a negative terminal and a positive terminal; a charge accumulator device a first terminal and a second terminal, wherein the charge accumulator device is configured to be chargeable with a voltage potential across the first and second terminals; and a switching circuit connected to the power source and the charge accumulator device, wherein the switching circuit comprises; a first switch that, when closed, provides a current path from the positive terminal of the power source to the motor; a second switch that, when closed, provides a current path from the positive terminal of the battery to the first terminal of the charge accumulator device; and a third switch that, when closed, provides a current path from the negative terminal of the power source to the second terminal of the charge accumulator device. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A surgical instrument comprising:
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an end effector comprising a movable firing member; an electric motor for actuating the firing member; a motor control circuit for controlling the motor, wherein the motor control circuit comprises; a power source; a charge accumulator device; and control means for; in a first instance, connecting the electric motor to the power source for powering the motor with the power source; in a second instance, connecting the electric motor to the power source for powering the motor with the power source and simultaneously connecting the charge accumulator device to the power source not in series with the motor for charging the charge accumulator device; and in a third instance, connecting the charge accumulator device to the power source in series for powering the electric motor with the power source and the charge accumulator device. - View Dependent Claims (19, 20)
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Specification