IP Library Granted Patent US 12,496,612
Granted Patent B2
US 12,496,612 · App. 17/571,095 · Granted Dec 16, 2025

Coating application system and methods for coating rotatable medical devices

Inventor: Ralph A. Chappa (Ham Lake, MN)
Assignee: Surmodics, Inc.
B05D1/002A61L29/16A61L31/16A61M25/10A61F2250/0067A61L2300/606A61M2025/105
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Quick Facts
Patent No.
US 12,496,612
App. No.
17/571,095
Granted
Dec 16, 2025
Kind
B2
Abstract

Embodiments herein relate to a system for coating rotatable medical devices and related methods. In an embodiment, a coating system for coating rotatable medical devices is included. The coating system can include a rotation mechanism, wherein the rotation mechanism is configured to mount and rotate a rotatable medical device. The coating system can also include a fluid applicator unit. The fluid applicator unit can include a rotating retention sleeve, the rotating retention sleeve defining a channel, wherein the rotatable medical device fits within the channel. The fluid applicator unit can also include a retention sleeve drive mechanism, wherein the retention sleeve drive mechanism is configured to rotate the rotating retention sleeve. The coating system can also include an inner collar, wherein the inner collar fits within the channel of the rotating retention sleeve. Other embodiments are also included herein.

Claims (28)

1 . A coating system for coating rotatable medical devices comprising:

a rotation mechanism, wherein the rotation mechanism is configured to mount and rotate a rotatable medical device;

a fluid applicator unit, the fluid applicator unit comprising

a fluid applicator tip configured to apply a coating to the rotatable medical device; and

a rotating retention sleeve, the rotating retention sleeve defining a channel, wherein the rotatable medical device fits within the channel of the rotating retention sleeve,

wherein the fluid applicator tip is configured to apply the coating to the rotatable medical device at a location that is not between a proximal end of the rotating retention sleeve and a distal end of the rotating retention sleeve; and

an inner collar, the inner collar defining a channel, wherein the inner collar fits within the channel of the rotating retention sleeve, and wherein an outside diameter of the inner collar is configured to match an outside diameter of a portion of the rotatable medical device.

2 . A coating system for coating rotatable medical devices comprising:

a rotation mechanism, wherein the rotation mechanism is configured to mount and rotate a rotatable medical device; and

a fluid applicator unit, the fluid applicator unit comprising

a fluid applicator tip configured to apply a coating to the rotatable medical device; and

a rotating retention sleeve, the rotating retention sleeve defining a channel, wherein the rotatable medical device fits within the channel of the rotating retention sleeve,

wherein the fluid applicator unit is configured such that the fluid applicator tip does not apply the coating to the rotatable medical device at a location that is between a proximal end of the rotating retention sleeve and a distal end of the rotating retention sleeve and the fluid applicator unit is further configured such that the fluid applicator tip does not apply the coating to the rotating retention sleeve at a location that is between the proximal end of the rotating retention sleeve and the distal end of the rotating retention sleeve.

3 . The coating system for coating rotatable medical devices of claim 2 , wherein the fluid applicator unit is configured to move relative to the rotatable medical device along a lengthwise axis thereof.

4 . The coating system for coating rotatable medical devices of claim 2 , further comprising:

an inner collar, the inner collar defining a channel;

wherein the inner collar fits within the channel of the rotating retention sleeve.

5 . The coating system for coating rotatable medical devices of claim 4 , wherein a mandrel fits within the channel of the inner collar.

6 . The coating system for coating rotatable medical devices of claim 2 , the fluid applicator unit further comprising a retention sleeve drive mechanism, wherein the retention sleeve drive mechanism is configured to rotate the rotating retention sleeve.

7 . The coating system for coating rotatable medical devices of claim 6 , wherein the retention sleeve drive mechanism is configured to rotate the rotating retention sleeve at a speed within 5 percent of the speed of rotation of the rotation mechanism.

8 . The coating system for coating rotatable medical devices of claim 6 , wherein the retention sleeve drive mechanism is configured to rotate the rotating retention sleeve at a speed matching a speed of rotation of the rotation mechanism.

9 . The coating system for coating rotatable medical devices of claim 6 , wherein the retention sleeve drive mechanism is configured to rotate the rotating retention sleeve at a speed of 100 to 1200 RPM.

10 . The coating system for coating rotatable medical devices of claim 6 , wherein the retention sleeve drive mechanism is configured to rotate the rotating retention sleeve at a speed of 150 to 500 RPM.

11 . The coating system for coating rotatable medical devices of claim 2 , wherein an outside diameter of a component of the medical device to be coated matches an inside diameter of the channel of the rotating retention sleeve.

12 . The coating system for coating rotatable medical devices of claim 2 , the rotation mechanism comprising:

a first end drive unit; and

a second end drive unit;

wherein the first end drive unit and the second end drive unit are attached to opposed ends of the rotatable medical device.

Assignments (4)
SECURITY INTEREST Recorded Jan 21, 2026
From: SURMODICS COATINGS, LLC
To: BANK OF MONTREAL, AS COLLATERAL AGENT
Reel/Frame 074461/0162 →
RELEASE OF SECURITY INTEREST Recorded Nov 24, 2025
From: MIDCAP FUNDING IV TRUST
To: SURMODICS, INC.; SURMODICS SHARED SERVICES, LLC; SURMODICS HOLDINGS, LLC; SURMODICS COATINGS, LLC; SURMODICS MD, LLC; SURMODICS COATINGS MFG, LLC; SURMODICS IVD, INC.; SURMODICS MD OPERATIONS, LLC; NORMEDIX, INC.
Reel/Frame 073690/0186 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 9, 2024
From: CHAPPA, RALPH A.
To: SURMODICS, INC.
Reel/Frame 068527/0112 →
SECURITY INTEREST Recorded Aug 23, 2024
From: SURMODICS, INC.; SURMODICS SHARED SERVICES, LLC; SURMODICS HOLDINGS, LLC; SURMODICS COATINGS, LLC; SURMODICS MD, LLC; SURMODICS COATINGS MFG, LLC; SURMODICS IVD, INC.; SURMODICS MD OPERATIONS, LLC; NORMEDIX, INC.
To: MIDCAP FUNDING IV TRUST
Reel/Frame 068762/0423 →
Continuity (2)
Provisional Application 63135279 · Jan 8, 2021
Related Publication 20220219194A1 · Jul 14, 2022
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