Coating apparatus and methods
View Patent ↗Embodiments of the invention include coating apparatuses and related methods. In an embodiment, the invention includes a coating apparatus. The coating apparatus can include a motor, a rotating contact member, a fluid applicator, a fluid pump, and a base member. The fluid applicator can include an orifice. The rotating contact member can be configured to rotate around a device to be coated that does not rotate. The rotating contact member can be configured to move along the lengthwise axis of a device to be coated. In an embodiment, the invention includes a method of coating a medical device. The method of coating a medical device can include a rotating a contact member around the outer diameter of a non-rotating medical device, applying a coating solution to the outer diameter of the non-rotating medical device at a position adjacent to the contact member, and moving at least one of the contact member and the non-rotating medical device with respect to one another so that the contact member moves with respect to the lengthwise axis of the non-rotating medical device. Other embodiments are also included herein.
1. A coating apparatus comprising:
a motor;
a rotating contact member in mechanical communication with the motor, the rotating contact member configured to rotate around a device to be coated that does not rotate, the rotating contact member also configured to move relative to the device to be coated along a lengthwise axis of the device to be coated;
a fluid applicator comprising an orifice adjacent to the rotating contact member;
a fluid pump in fluid communication with the fluid applicator; and
a base member supporting the rotating contact member and the fluid applicator.
2. The coating apparatus of claim 1 , the rotating contact member comprising a spiral shape.
3. The coating apparatus of claim 2 , the rotating contact member comprising a spiral shaped wire.
4. The coating apparatus of claim 3 , the spiral shaped wire comprising a shape memory metal.
5. The coating apparatus of claim 3 , the spiral oriented so that rotation carries a coating composition along the surface of the device to be coated in the same direction along the lengthwise axis of the device to be coated as the rotating contact member moves.
6. The coating apparatus of claim 1 , the rotating contact member comprising a channel into which a device to be coated fits.
7. The coating apparatus of claim 1 , the rotating contact member comprising a plurality of bristles.
8. The coating apparatus of claim 1 , the rotating contact member comprising a brush.
9. The coating apparatus of claim 6 , the rotating contact member comprising a housing, the channel comprising a central lumen defined by the housing.
10. The coating apparatus of claim 9 , wherein the diameter of the central lumen is larger at one end than the other.
11. The coating apparatus of claim 9 , the lumen comprising a funnel shape at one end of the housing.
12. The coating apparatus of claim 9 , wherein the housing is cylindrical.
13. The coating apparatus of claim 1 , wherein the rotating member rotates at a speed of 50 to 400 rotations per minute.
14. The coating apparatus of claim 1 , wherein the rotating member rotates at a speed of 100 to 200 rotations per minute.
15. The coating apparatus of claim 6 , wherein the channel accommodates a device to be coated having a radius of between 0.5 mm and 20 mm.
16. The coating apparatus of claim 1 , further comprising a drive wheel contacting the device to be coated, wherein the drive wheel pulls or pushes the device to be coated through the rotating contact member.
17. The coating apparatus of claim 16 , wherein the drive wheel pulls the device to be coated through the rotating contact member at a speed of between 0.1 and 1.5 cm/s.
18. The coating apparatus of claim 1 , wherein the rotating contact member moves between an open configuration and a closed configuration, wherein the device to be coated is inserted or removed from the rotating contact member when it is in the open configuration.
19. The coating apparatus of claim 1 , further comprising a drive shaft that conveys motive force between the motor and the rotating contact member, wherein the drive shaft is hollow and a portion of the device to be coated is disposed within the drive shaft.
20. The coating apparatus of claim 1 , the base including a hand grip.
21. The coating apparatus of claim 1 , the base mounted on a six-axis robot arm.