Torque controlled tubing
First Claim
1. Catheter tubing suitable for medical uses, comprising an interior tubular portion and a concentric outer shell, wherein said interior portion extends beyond said concentric outer shell on at least one end of the longitudinal axis, and wherein said interior portion comprises a first innermost resin (2), and a second outermost resin (4), said tubing having a first point along its length and a second point at or beyond said concentric outer shell (6) along its length spaced apart from said first point, the thickness of said first resin (2) tapering in a decreasing fashion as it passes from said first point to said second point an the thickness of said second resin (4) tapering inversely to the taper of said first resin (2) as it passes from said first point to said second point, and wherein the hardness of the innermost resin (2) exceeds the hardness of the outermost resin (4) in the interior tubular portion and the hardness of the concentric outer shell exceeds the hardness of said second resin (4).
1 Assignment
0 Petitions
Accused Products
Abstract
Catheter tubing suitable for medical uses is disclosed, comprising an interior tubular portion and a concentric outer shell, wherein said interior portion extends beyond said concentric outer shell on at least one end of the longitudinal axis, and wherein the hardness of the concentric outer shell exceeds the hardness of the interior tubular portion, the interior tubular portion further comprising at least two resins co-tapered with respect to each other, the hardness of the innermost of which exceeds the hardness of the outermost.
199 Citations
11 Claims
- 1. Catheter tubing suitable for medical uses, comprising an interior tubular portion and a concentric outer shell, wherein said interior portion extends beyond said concentric outer shell on at least one end of the longitudinal axis, and wherein said interior portion comprises a first innermost resin (2), and a second outermost resin (4), said tubing having a first point along its length and a second point at or beyond said concentric outer shell (6) along its length spaced apart from said first point, the thickness of said first resin (2) tapering in a decreasing fashion as it passes from said first point to said second point an the thickness of said second resin (4) tapering inversely to the taper of said first resin (2) as it passes from said first point to said second point, and wherein the hardness of the innermost resin (2) exceeds the hardness of the outermost resin (4) in the interior tubular portion and the hardness of the concentric outer shell exceeds the hardness of said second resin (4).
Specification