Carbon coating of grafts or catheters
AssigneeCordis Corporation
InventorPeter P. Tarjan
Life of this patent
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Abstract
An internally carbon coated graft or catheter and method of coating said grafts and catheters through the use of a carbon rod or a metal rod having a carbon pellet at its end coaxially positioned within the substrate's lumen. The graft may be concentrically supported by a metal tube. The rod and metal tube are placed into a vacuum chamber and the rod is subjected to a laser beam to cause the carbon end portion of the rod to transform into gaseous carbon and be deposited on the lumen of the substrate. The process is continued by moving the rod axially along the catheter or graft while being subjected to the effects of the laser beam.
Claims15
A method of coating an internal surface of a tube having a lumen comprising the steps of
- positioning a carbon body within the lumen of the tube to be coated;
- applying a beam of energy to said carbon body and causing the creation of gaseous carbon atoms to be deposited on the internal surface forming said lumen;
- and
- causing relative movement between the internal surface and the carbon body during application of said beam.
A method of coating the lumen of a tubular substrate comprising the steps of
- surrounding the substrate with a tubular heat sink;
- inserting a rod having at least a portion formed from carbon in the lumen of the substrate;
- placing the substrate, heat sink and rod into a chamber;
- applying a laser beam to said at least a portion of the rod for vaporizing the carbon and depositing the vaporized carbon in the lumen;
- and
- causing relative movement between the lumen surface and the rod during application of the laser beam.
Dependencies are inferred from the claim text.