Endoscopic shaver blade with resilient cutting edges
AssigneeLinvatec Corporation
InventorsGary R. Heisler, Robert A. Van Wyk
Life of this patent
Estimating the term…
Abstract
A rotating endoscopic shaver blade assembly adapted for side-cutting and end-cutting. A pair of longitudinally extending, symmetrical fingers extends from the distal end of an elongated tubular inner member and are juxtaposed adjacent a window at the distal end of an elongated tubular outer member. Each of the fingers is provided with laterally facing and transversely facing cutting edges and has a curvilinear profile terminating at a distal tip. The distal tips of the fingers are separated by an axially aligned gap which enables limited stress-relieving radial movement of the fingers.
Claims16
A surgical rotating shaver blade assembly comprising:
- an elongated outer tubular member having an axis, a distal end, a proximal end and an opening at said distal end;
- an elongated inner tubular member co-axially aligned and adapted to move within said outer tubular member and having a cylindrical body with a distal end and a proximal end;
- a cutting means at said distal end of said inner tubular member for cutting tissue presented through said opening, said cutting means comprising at least two diametrically opposed finger members extending longitudinally from said distal end of said inner tubular member, each of said finger members comprising:
- a body having a proximal portion and a distal portion, said proximal portion being longitudinally extending and joined to the cylindrical body of said inner tubular member, said distal portion joined to said proximal portion and transversely and longitudinally extending therefrom to a terminating point spaced a predetermined distance from said axis.
A cutting tip for a surgical instrument having a tubular, cylindrical body having a distal end and a proximal end, said proximal end having a rotatable shaft joined axially thereto, said cutting tip comprising:
- at least two diametrically opposed, transversely arcuate, axially symmetrical finger members extending longitudinally from said distal end of said cylindrical body, each of said finger members comprising:
- a transversely arcuate body having a proximal portion and a distal portion, said proximal portion being longitudinally extending and joined to said distal end of said cylindrical body and subtending a predetermined arcuate distance of less than 180.degree., said distal portion joined to said proximal portion and transversely and longitudinally extending therefrom to a terminating point spaced a predetermined distance from said axis.
A cutting tip for a rotatable surgical instrument having an outer, tubular stationary body, an inner tubular, cylindrical body rotatable within said outer body, said cutting tip comprising:
- an outer distal tip attached to said outer stationary tubular body, said outer tip having a proximal end, a distal end and an opening at said distal end in its side and end wall, said opening having a first cutting edge around its periphery;
- an inner distal tip attached to said inner rotatable tubular body, said inner tip having a proximal end, a distal end and a pair of longitudinally extending fingers extending from said distal end, a second cutting edge formed on the periphery of one of said fingers and a third cutting edge formed on the periphery of the other of said fingers, said second and third cutting edges being spaced from each other on opposite sides of an imaginary plane extending through the axis of said inner distal tip.
A shaver blade for a rotating surgical shaver assembly comprising an elongated cylindrical body having an axis, a distal tip with a distal end and a first cutting edge formed in said distal tip, said first cutting edge defined by the locus of points at the intersection of the cylindrical outer surface of said body and a first curved surface lying in a contour all points of which are parallel to an imaginary plane through the axis of said body and spaced therefrom.
Dependencies are inferred from the claim text.