TORQUE OPTIMIZATION FOR SURGICAL INSTRUMENTS
First Claim
Patent Images
1. A surgical stapler, comprising:
- an end effector comprising a plurality of deployable staples and a firing element;
a motor configured to drive said firing element, wherein said motor comprises a primary set of coils and a secondary set of coils; and
a control system in signal communication with said motor, wherein said control system comprises;
a battery;
a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said motor; and
a switch configured to switch the electric motor between a plurality of operating states, wherein the plurality of operating states comprises;
a first operating state in which the primary set of coils are configured to drive said firing element; and
a second operating state in which said primary set of coils and said secondary set of coils are configured to drive said firing element.
4 Assignments
0 Petitions
Accused Products
Abstract
A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor. The speed management control can include a pulse width modulation circuit, which can control the duration of pulses supplied from the battery to the motor. The motor can include a primary set of coils and a secondary set of coils. The control system can direct surplus current to the secondary set of coils to maximize the torque generated by the motor.
-
Citations
21 Claims
-
1. A surgical stapler, comprising:
-
an end effector comprising a plurality of deployable staples and a firing element; a motor configured to drive said firing element, wherein said motor comprises a primary set of coils and a secondary set of coils; and a control system in signal communication with said motor, wherein said control system comprises; a battery; a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said motor; and a switch configured to switch the electric motor between a plurality of operating states, wherein the plurality of operating states comprises; a first operating state in which the primary set of coils are configured to drive said firing element; and a second operating state in which said primary set of coils and said secondary set of coils are configured to drive said firing element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 14, 15)
-
-
9. A surgical stapler, comprising:
-
an end effector comprising a plurality of deployable staples and a firing element; a control system, comprising; a battery; and a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery; and a motor in signal communication with said control system and configured to drive said firing element, wherein said motor comprises; a primary set of coils configured to generate a first amount of torque, wherein the first amount of torque drives said firing element in a first direction; and a secondary set of coils configured to generate a second amount of torque, wherein the first amount of torque and the second amount of torque drive said firing element in a second direction. - View Dependent Claims (10, 11, 12, 13)
-
-
16. A surgical stapler, comprising:
-
an end effector comprising a plurality of deployable staples and a firing element; a motor configured to drive said firing element, wherein said motor comprises a primary set of coils; and a control system in signal communication with said motor, wherein said control system comprises; a battery; and a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said primary set of coils. - View Dependent Claims (17, 18, 19, 20, 21)
-
Specification