Motorized surgical instrument
First Claim
Patent Images
1. A surgical instrument comprising:
- an end effector comprising a moveable 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 network of switches defining a charge state and a discharge state, wherein in the charge state the power source is connected to the charge accumulator device not in series to electrically charge the charge accumulator device, wherein in the charge state, the power source is connected to the motor and provides electric current to the motor, and wherein in the discharge state the charge accumulator is connected in series with the power source to provide additional power to the motor, wherein the network of switches does not assume the charge state and the discharge state simultaneously.
4 Assignments
0 Petitions
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.
-
Citations
20 Claims
-
1. A surgical instrument comprising:
-
an end effector comprising a moveable 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 network of switches defining a charge state and a discharge state, wherein in the charge state the power source is connected to the charge accumulator device not in series to electrically charge the charge accumulator device, wherein in the charge state, the power source is connected to the motor and provides electric current to the motor, and wherein in the discharge state the charge accumulator is connected in series with the power source to provide additional power to the motor, wherein the network of switches does not assume the charge state and the discharge state simultaneously. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A surgical instrument comprising:
-
an end effector comprising a moveable firing member; an electric motor for actuating the firing member; a firing trigger switch; 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, wherein the firing trigger, when actuated, closes a connection between the power source and the electric motor for providing an electric current to the electric motor; a charge accumulator device comprising 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 in series with the firing trigger switch that, when closed, provides a current path from the positive terminal of the power source to the electric motor; a second switch that, when closed, provides a current path from the positive terminal of the power source to the first terminal of the charge accumulator device wherein when the second switch is closed, the charge accumulator device is not in series with the power source; 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)
-
-
18. A surgical instrument comprising:
-
an end effector comprising a moveable 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 for charging the charge accumulator device, wherein a voltage provided to the electric motor in the second instance is substantially equal to a voltage provided to the electric motor in the first instance; 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)
-
Specification