Coring knife
First Claim
Patent Images
1. A coring knife comprising:
- a coring blade including a circular cutting edge;
a coring abutment located forward of the cutting edge;
a key socket located to the rear of the coring blade, the key socket including a bearing surface; and
a key connected to the coring abutment and including a key edge in contact with the bearing surface, the key configured to be moved relative the key socket,wherein when the key is moved relative the key socket, the key edge slips against the bearing surface and the key pivots the coring abutment relative to the coring blade, wherein when the coring abutment pivots, a portion of the coring abutment moves closer to the coring blade,wherein the key includes a cylinder having an outer surface that terminates at the key edge,wherein the key edge is disposed within a rear cavity of the key socket, andwherein the coring blade is mounted over a central shaft extending out of a forward cavity of the key socket, the coring blade is configured to be rotated around the central shaft, and wherein when the coring blade is rotated, the coring blade moves toward the coring abutment.
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Accused Products
Abstract
A coring knife can be used to make a circular incision. The coring knife includes an abutment that is inserted into an initial slit through the heart wall. The abutment can be inserted into the slit while oriented in a direction that minimizes its insertion profile. After insertion, the abutment is reoriented by turning a key so that its abutment surface faces toward a circular cutting edge of the coring knife on the other side of the heart wall. The circular incision through the heart wall is made by pressing the circular cutting edge of the coring knife against the abutment.
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Citations
21 Claims
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1. A coring knife comprising:
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a coring blade including a circular cutting edge; a coring abutment located forward of the cutting edge; a key socket located to the rear of the coring blade, the key socket including a bearing surface; and a key connected to the coring abutment and including a key edge in contact with the bearing surface, the key configured to be moved relative the key socket, wherein when the key is moved relative the key socket, the key edge slips against the bearing surface and the key pivots the coring abutment relative to the coring blade, wherein when the coring abutment pivots, a portion of the coring abutment moves closer to the coring blade, wherein the key includes a cylinder having an outer surface that terminates at the key edge, wherein the key edge is disposed within a rear cavity of the key socket, and wherein the coring blade is mounted over a central shaft extending out of a forward cavity of the key socket, the coring blade is configured to be rotated around the central shaft, and wherein when the coring blade is rotated, the coring blade moves toward the coring abutment. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A coring knife comprising:
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a coring blade including a circular cutting edge; a coring abutment located forward of the cutting edge; a key socket located to the rear of the coring blade, the key socket including a bearing surface; and a key connected to the coring abutment and including a key edge in contact with the bearing surface, the key configured to be moved relative the key socket, wherein when the key is moved relative the key socket, the key edge slips against the bearing surface and the key pivots the coring abutment relative to the coring blade, wherein when the coring abutment pivots, a portion of the coring abutment moves closer to the coring blade, wherein the key includes a cylinder having an outer surface that terminates at the key edge, wherein the key edge is disposed within a rear cavity of the key socket, and wherein the coring blade is carried on an internal sleeve, the internal sleeve is carried on a central shaft extending out of a forward cavity of the key socket, the internal sleeve is configured to slide relative the central shaft in a direction toward the coring abutment, the coring blade is configured to be rotated relative the internal sleeve, and wherein when the coring blade is rotated, the coring blade moves toward the coring abutment. - View Dependent Claims (8, 9, 10)
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11. A coring knife comprising:
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a coring blade including a circular cutting edge; a coring abutment located forward of the cutting edge; a key socket located to the rear of the coring blade, the key socket including a bearing surface; a key connected to the coring abutment and including a key edge in contact with the bearing surface, the key configured to be moved relative the key socket, wherein when the key is moved relative the key socket, the key edge slips against the bearing surface and the key pivots the coring abutment relative to the coring blade, wherein when the coring abutment pivots, a portion of the coring abutment moves closer to the coring blade; a coring knife case configured to be moved away from the key socket, wherein the coring blade is movable into and out of the coring knife case; and a control sleeve attached to the coring blade, the control sleeve having a helical slot that extends into the coring knife case, wherein the coring knife case includes a guide peg that protrudes into the helical slot, and wherein rotation of the control sleeve causes the coring blade to move out of the coring knife case. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A coring knife comprising:
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a coring blade including a cylindrical wall defining a circular cutting edge and a hollow interior; a coring abutment; a coring knife case containing the coring blade, the coring blade configured to be extended out of the coring knife case and toward the coring abutment; and a key coupled to the coring abutment by a control arm extending into the coring blade, the key disposed within a key socket and configured to be rotated relative to the key socket, wherein when the key is rotated relative the key socket, the key pulls the control arm in a manner that pivots the coring abutment relative to the coring blade. - View Dependent Claims (18, 19, 20, 21)
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Specification