Surgical cutting instrument
AssigneeSmith & Nephew, Inc.
InventorKaren Drucker
Life of this patent
Estimating the term…
Abstract
A surgical cutting instrument, disposed generally along a rotational axis, includes a member extending from a base. The member is rotatable to transmit torque from the base to a cutter carried at the distal end of the member. The cutter defines one cutting edge oriented in a right-handed direction, and another cutting edge oriented in a left-handed direction. The right-handed and left-handed cutting edges can be, e.g., defined by a symmetrical revolved surface, forward-swept, symmetrical, or separated by an uninterrupted circumferential band of material.
Claims39
A surgical cutting instrument disposed generally along an axis, the cutting instrument comprising:
- a first member extending distally from a base and having distal and proximal ends, the first member being rotatable to transmit torque from the base to the distal end of the member;
- a cutter carried at the distal end of the first member, the cutter having a first cutting edge defined by a symmetrical revolved surface.
A surgical cutting instrument comprising:
- a first member extending distally from a base along an axis and having distal and proximal ends, the first member being rotatable to transmit torque from the base to the distal end of the member;
- a cutter carried at the distal end of the first member, the cutter having distal and proximal ends and defining a first cutting edge oriented in a right-handed direction and a second cutting edge oriented in a left-handed direction;
- and
- the distal end of the cutter defining a generally planar area that lies at an acute angle to the axis of the first member, the generally planar area intersecting the first and second cutting edges at respective first and second points.
A surgical cutting instrument disposed generally along an axis, the cutting instrument comprising:
- a first member extending distally from a base and having distal and proximal ends, the first member being rotatable to transmit torque from the base to the distal end of the member;
- a cutter carried at the distal end of the first member, the cutter defining a first cutting edge oriented in a right-handed direction and a second cutting edge oriented in a left-handed direction, the first and second cutting edges being forward-swept;
- a relatively rigid hollow second member coaxially disposed around the first member, the first member being rotatable within the second member and a distal end of the second member being substantially entirely open to expose a distal end of the cutter.
Dependencies are inferred from the claim text.