Surgical instrument having a power control circuit
First Claim
Patent Images
1. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
- an end effector comprising;
a first jaw member;
a second jaw member coupled to move relative to the first jaw member from an open position, where the jaw members are apart from one another, to a closed position; and
a firing bar positioned to fire by translating within the end effector when the first and second jaw members are in the closed position;
a drive device mechanically coupled to the firing bar;
a drive train mechanically coupled to the drive device and to the firing bar;
a clamping trigger mechanically coupled to the end effector such that the clamping trigger defines an actuated position that causes the second jaw member to pivot towards the first jaw member and an un-actuated position that causes the second jaw member to pivot away from the first jaw member;
a control circuit, wherein the control circuit comprises;
a power supply comprising a first terminal and a second terminal;
a switching device alternately configurable between a first connection state and a second connection state;
a firing switch positioned on a first electrical connection between the power supply, the drive device, and the switching device, wherein the firing switch defines an actuated position;
a clamp switch in mechanical communication with the clamping trigger and positioned on a second electrical connection between the power supply and the switching device;
an end-of-stroke switch defining a first position in which the end-of-stroke switch forms part of a third electrical connection between the first terminal of the power supply and the drive device, and a second position in which the end-of-stroke switch forms part of a fourth electrical connection between the second terminal of the power supply, the switching device, and the drive device, wherein the end-of-stroke switch is in physical contact with at least a portion of the drive train positioned to transition the end-of-stroke switch to the second position when the firing bar reaches an end of stroke;
wherein the first electrical connection is completed when the firing switch is in the actuated position and the switching device is in the first connection state;
wherein, upon the end-of-stroke switch transitioning to the second position, the fourth electrical connection is completed, causing the switching device to transition to the second state, wherein the transition to the second state causes the switching device to break the first electrical connection; and
wherein, when the clamping trigger is in the un-actuated position, the clamp switch is closed to complete the second electrical connection causing the switching device to transition to the first state.
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Accused Products
Abstract
Various embodiments are directed to a powered surgical instrument for cutting and fastening tissue. The instrument may comprise an end effector comprising a first jaw member and a second jaw member, a drive device, a clamping trigger, and a control circuit. The control circuit may comprise a power supply, a firing switch, a clamp switch, a switching device and an end-of-stroke switch. The firing switch may be electrically connected to, upon actuation, connect the power supply to the drive device via a first connection comprising the switching device and the firing switch.
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Citations
19 Claims
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1. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
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an end effector comprising; a first jaw member; a second jaw member coupled to move relative to the first jaw member from an open position, where the jaw members are apart from one another, to a closed position; and a firing bar positioned to fire by translating within the end effector when the first and second jaw members are in the closed position; a drive device mechanically coupled to the firing bar; a drive train mechanically coupled to the drive device and to the firing bar; a clamping trigger mechanically coupled to the end effector such that the clamping trigger defines an actuated position that causes the second jaw member to pivot towards the first jaw member and an un-actuated position that causes the second jaw member to pivot away from the first jaw member; a control circuit, wherein the control circuit comprises; a power supply comprising a first terminal and a second terminal; a switching device alternately configurable between a first connection state and a second connection state; a firing switch positioned on a first electrical connection between the power supply, the drive device, and the switching device, wherein the firing switch defines an actuated position; a clamp switch in mechanical communication with the clamping trigger and positioned on a second electrical connection between the power supply and the switching device; an end-of-stroke switch defining a first position in which the end-of-stroke switch forms part of a third electrical connection between the first terminal of the power supply and the drive device, and a second position in which the end-of-stroke switch forms part of a fourth electrical connection between the second terminal of the power supply, the switching device, and the drive device, wherein the end-of-stroke switch is in physical contact with at least a portion of the drive train positioned to transition the end-of-stroke switch to the second position when the firing bar reaches an end of stroke; wherein the first electrical connection is completed when the firing switch is in the actuated position and the switching device is in the first connection state; wherein, upon the end-of-stroke switch transitioning to the second position, the fourth electrical connection is completed, causing the switching device to transition to the second state, wherein the transition to the second state causes the switching device to break the first electrical connection; and wherein, when the clamping trigger is in the un-actuated position, the clamp switch is closed to complete the second electrical connection causing the switching device to transition to the first state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
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an end effector comprising; a first jaw member; a second jaw member coupled to move relative to the first jaw member from an open position, where the jaw members are apart from one another, to a closed position; and a firing bar positioned to fire by translating within the end effector when the first and second jaw members are in the closed position; and a drive device mechanically coupled to the firing bar; and a clamping trigger mechanically coupled to the end effector such that actuation of the clamping trigger causes the second jaw member to pivot towards the first jaw member; a rack defining a protrusion, wherein the rack is translatable distally and proximally, wherein the rack is in mechanical communication with the firing bar, and wherein the rack defines at least one geared face; a control circuit, wherein the control circuit comprises; a firing switch configured to be in electrical communication with a power supply for powering the drive device and in electrical communication with the drive device; a clamp switch in mechanical communication with the clamping trigger; a latching device in electrical communication with the clamp switch, the power supply and the drive device; and an end-of-stroke switch in electrical communication with the latching device, wherein the end-of-stroke switch comprises an actuator positioned to contact the protrusion of the rack to actuate the end-of-stroke switch when the rack reaches a position indicating the end of the firing bar stroke; and wherein the firing switch is electrically connected to, upon actuation, connect the power supply to the drive device via a first connection comprising the latching device and the firing switch; wherein the end-of-stroke switch is electrically connected to, upon actuation, cause a change in a state of the latching device to break the first connection between the power supply and the drive device.
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18. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
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an end effector comprising; a first jaw member; a second jaw member coupled to move relative to the first jaw member from an open position, where the jaw members are apart from one another, to a closed position; and a firing bar positioned to fire by translating within the end effector when the first and second jaw members are in the closed position; and a drive device mechanically coupled to the firing bar; and a clamping trigger mechanically coupled to the end effector such that actuation of the clamping trigger causes the second jaw member to pivot towards the first jaw member; a rack translatable distally and proximally, wherein the rack is in mechanical communication with the firing bar, and wherein the rack defines at least one geared face; a control circuit, wherein the control circuit comprises; a firing switch configured to be in electrical communication with a power supply for powering the drive device and in electrical communication with the drive device; a clamp switch in mechanical communication with the clamping trigger; a latching device in electrical communication with the clamp switch, the power supply and the drive device; and an end-of-stroke switch in electrical communication with the latching device; a stroke position switch positioned to actuate when the firing bar reaches a predetermined position; and a resistive element in electrical communication with the stroke position switch; wherein the firing switch is electrically connected to, upon actuation, connect the power supply to the drive device via a first connection comprising the latching device and the firing switch; wherein the end-of-stroke switch is positioned to be actuated at an end of stroke of the firing bar and, upon actuation, cause a change in a state of the latching device to break the first connection between the power supply and the drive device; wherein the stroke position switch is electrically connected to electrically switch the resistive element between the power supply and the drive device until actuated in response to the firing bar reaching the predetermined position; wherein the stroke position switch comprises an actuator, and wherein the rack defines a cavity positioned to receive the actuator of the stroke position switch to actuate the stroke position switch when the firing bar reaches the predetermined position.
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19. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
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an end effector comprising; a first jaw member; a second jaw member coupled to move relative to the first jaw member from an open position, where the jaw members are apart from one another, to a closed position; and a firing bar positioned to fire by translating within the end effector when the first and second jaw members are in the closed position; and a drive device mechanically coupled to the firing bar; and a clamping trigger mechanically coupled to the end effector such that actuation of the clamping trigger causes the second jaw member to pivot towards the first jaw member; an emergency access door; and a control circuit, wherein the control circuit comprises; a firing switch configured to be in electrical communication with a power supply for powering the drive device and in electrical communication with the drive device; a clamp switch in mechanical communication with the clamping trigger; a latching device in electrical communication with the clamp switch, the power supply and the drive device; and an end-of-stroke switch in electrical communication with the latching device; an emergency access door switch coupled to the emergency access door such that opening of the emergency access door actuates the emergency access door switch to break an electrical connection to the power supply; and wherein the firing switch is electrically connected to, upon actuation, connect the power supply to the drive device via a first connection comprising the latching device and the firing switch; wherein the end-of-stroke switch is positioned to be actuated at an end of stroke of the firing bar and, upon actuation, causes a change in a state of the latching device to break the first connection between the power supply and the drive device.
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Specification