Coring knife
First Claim
Patent Images
1. A coring knife comprising:
- a coring knife casing;
a coring blade including a cylindrical wall defining a circular cutting edge and a hollow interior, the coring blade movable into and out of the coring knife casing, the coring blade configured to move out of the coring knife casing when the coring blade is rotated relative to the coring knife casing;
a control sleeve attached to the coring blade, the control sleeve having a helical slot and disposed within the coring knife casing, the coring knife casing including a guide peg that extends into the helical slot; and
a coring abutment capable of being located forward of the cutting edge, the coring abutment attached to a support extending longitudinally into the coring blade,wherein rotation of the control sleeve relative to the coring knife casing, with the guide peg in the helical slot, causes the coring blade to extend out of the coring knife casing, andwherein the cutting edge is configured to cut tissue against a surface of the coring abutment, the cutting edge and the surface of the coring abutment are movable relative to each other, and the surface of the coring abutment is configured to tilt relative to the cutting edge and the support, such that a first point on the surface of the coring abutment moves from a first point initial position to a first point subsequent position that is longitudinally closer to the coring blade than the first point initial position, and a second point on the surface of the coring abutment moves from a second point initial position to a second point subsequent position that is longitudinally further away from the coring blade than the second point initial position.
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Accused Products
Abstract
A coring knife can be used to make a circular incision. The coring knife can include an abutment that can be inserted into heart tissue. The circular incision is made by pressing the circular cutting edge of the coring knife against the abutment.
85 Citations
21 Claims
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1. A coring knife comprising:
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a coring knife casing; a coring blade including a cylindrical wall defining a circular cutting edge and a hollow interior, the coring blade movable into and out of the coring knife casing, the coring blade configured to move out of the coring knife casing when the coring blade is rotated relative to the coring knife casing; a control sleeve attached to the coring blade, the control sleeve having a helical slot and disposed within the coring knife casing, the coring knife casing including a guide peg that extends into the helical slot; and a coring abutment capable of being located forward of the cutting edge, the coring abutment attached to a support extending longitudinally into the coring blade, wherein rotation of the control sleeve relative to the coring knife casing, with the guide peg in the helical slot, causes the coring blade to extend out of the coring knife casing, and wherein the cutting edge is configured to cut tissue against a surface of the coring abutment, the cutting edge and the surface of the coring abutment are movable relative to each other, and the surface of the coring abutment is configured to tilt relative to the cutting edge and the support, such that a first point on the surface of the coring abutment moves from a first point initial position to a first point subsequent position that is longitudinally closer to the coring blade than the first point initial position, and a second point on the surface of the coring abutment moves from a second point initial position to a second point subsequent position that is longitudinally further away from the coring blade than the second point initial position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A coring knife comprising:
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a grip; a coring abutment connected to the grip; and a slide assembly connected to the grip, the slide assembly including a coring blade with a circular cutting edge, a control sleeve connected to the coring blade, and a coring knife casing containing the coring blade, wherein the control sleeve has a helical feature engaged to the coring knife casing such that rotation of the control sleeve relative to the coring knife casing urges the control sleeve to move in a forward direction toward the coring abutment, and the movement of the control sleeve in the forward direction extends the coring blade out of the coring knife casing into contact with the coring abutment, and wherein the coring knife casing, the control sleeve, and the coring blade are configured to be moved together, relative to the grip, in the forward direction toward the coring abutment prior to extension of the coring blade out of the coring knife casing. - View Dependent Claims (20, 21)
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Specification