Stent and Method of Coating Same
OwnerJohn E. Pappinventor
Life of this patent
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Abstract
Coating a stent may include continuously rotating the stent in one direction while spraying a first coating layer followed by continuously rotating the stent in another direction while spraying a second coating layer, wherein the first layer is preferentially distributed over a side surface of the stent struts and the second layer is preferentially distributed over an opposite side surface of the stent struts. The overall coating distribution combining both layers may be evenly distributed over the two side surfaces of the stent struts.
Claims25
A method of coating a stent, the method comprising:
- discharging from a dispenser a first coating substance onto the stent while simultaneously rotating the stent around a longitudinal axis of the stent in a first rotation direction and while simultaneously moving a dispenser across a longitudinal length of the stent;
- followed by
- discharging from the dispenser a second coating substance onto the first coating substance on the stent while simultaneously rotating the stent around the longitudinal axis of the stent in a second rotation direction and while simultaneously moving the dispenser across the longitudinal length of the stent, the second rotation direction being the reverse of the first rotation direction.
A method of coating a stent, the method comprising:
- performing at least two process cycles, each process cycle including spraying a coating substance onto or into a stent while simultaneously rotating the stent, the rotating of the stent during at least one of the process cycles is in a rotation direction that is opposite of a rotation direction of at least one other of the process cycles.
A method of coating a stent, the method comprising:
- performing at least two process cycles, each process cycle including distributing a sprayed coating substance onto or into a stent while simultaneously rotating the stent,
- wherein performing the at least two process cycles includes balancing the distribution of the coating substance on or within a plurality of struts of the stent, by rotating the stent during at least one of the process cycles in a rotation direction that is opposite of a rotation direction of at least one other of the process cycles.
An implantable medical device comprising:
- a plurality of struts arranged in a circular pattern, each of the struts includes a first side surface facing in a first circumferential direction, a second side surface facing in a second circumferential direction opposite the first circumferential direction, and a coating over the first and second side surfaces, the coating for each strut having a plurality of layers including a first layer and a second layer over and around the first layer, the first layer having an average thickness over the first side surface that is greater than that on the second side surface, the second layer having an average thickness over the second side surface that is greater than that over the first side surface.
Dependencies are inferred from the claim text.