Surgical instrument having a power control circuit
First Claim
1. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
- an end effector, the end effector comprising;
a first jaw member;
a second jaw member coupled to move relative to the first jaw member from an open position wherein the first jaw member and the second jaw member are apart from one another to a closed position; and
a firing bar positioned to fire by translating distally within the end effector when the first and second jaw members are in the closed position;
a drive system mechanically coupled to the firing bar;
a power supply for powering the drive system; and
a control circuit, wherein the control circuit comprises;
a relay;
a firing switch having at least a first firing switch position and a second firing switch position; and
a clamp device having a first state and a second state, wherein the clamp device is configured to take the second state when the first jaw member and the second jaw member are in the closed position, wherein the clamp device is connected to activate the relay when the clamp device is in the second state, and wherein, upon activation of the relay, the firing switch is connected to provide power from the power supply to drive the drive system when the firing switch is in the second firing switch position.
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Accused Products
Abstract
A powered surgical instrument for cutting and fastening tissue comprises an end effector having first and second jaw members that move relatively between open and closed positions. A control circuit comprises a relay, a firing switch having first and second firing switch positions, and a clamp device that can take first and second states. The clamp device takes a second state when the jaw members are in the closed position such that the clamp device activates the relay. Upon activation of the relay, the firing switch is connected to provide power from a power supply to drive a drive system of the instrument when the firing switch is in a second firing switch position.
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Citations
18 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, the end effector comprising; a first jaw member; a second jaw member coupled to move relative to the first jaw member from an open position wherein the first jaw member and the second jaw member are apart from one another to a closed position; and a firing bar positioned to fire by translating distally within the end effector when the first and second jaw members are in the closed position; a drive system mechanically coupled to the firing bar; a power supply for powering the drive system; and a control circuit, wherein the control circuit comprises; a relay; a firing switch having at least a first firing switch position and a second firing switch position; and a clamp device having a first state and a second state, wherein the clamp device is configured to take the second state when the first jaw member and the second jaw member are in the closed position, wherein the clamp device is connected to activate the relay when the clamp device is in the second state, and wherein, upon activation of the relay, the firing switch is connected to provide power from the power supply to drive the drive system when the firing switch is in the second firing switch position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A powered surgical instrument for cutting and fastening tissue, the instrument comprising:
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an end effector, the end effector comprising; a first jaw member; a second jaw member coupled to move relative to the first jaw member from an open position wherein the first jaw member and the second jaw member are apart from one another to a closed position; and a firing bar positioned to fire by translating distally within the end effector when the first and second jaw members are in the closed position; a drive system mechanically coupled to the firing bar; a power supply for powering the drive system; a control circuit; an enclosure, wherein the drive system, the power supply, and the control circuit are at least partially contained within the enclosure, and wherein the enclosure defines an access opening; an access door positioned to cover the access opening; a user-actuated retraction lever to retract the firing bar proximally when actuated by a user of the surgical instrument; and wherein the control circuit comprises; a firing switch having a first firing switch position and a second firing switch position; and an access door switch mechanically coupled to the access door, wherein the access door switch has a first access door switch position when the access door is open and a second access door switch position when the access door is closed, wherein the access door switch is connected to interrupt power from the power supply to the drive system when the access door switch is in the second access door switch position. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification