System for lubricating a syringe barrel

• US 5,456,940 A
• Filed: 03/28/1994
• Issued: 10/10/1995
• Est. Priority Date: 03/28/1994
• Status: Expired due to Term

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Minimed, Inc. (Medtronic Plc)
• Inventors: Funderburk, Jeffrey V.
• Primary Examiner(s): Beck, Shrive
• Assistant Examiner(s): PARKER, FREDERICK JOHN
• Application Number:
  US08/219,074
• Time in Patent Office: 561 Days
• Field of Search: 427/256, 427/421, 427/2.1, 427/230, 427/236, 427/479, 604/230, 604/265, 118/317, 118/500
• US Class Current: 427/2.1
• CPC Class Codes: A61M 2005/3131 specially adapted for improving sealing or sliding
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: B05B 13/0627 Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies B05B13/0645 takes precedence
• CPC Class Codes: B05B 13/069 the hollow bodies having a closed end
• CPC Class Codes: B05B 7/0807 to form intersecting jets
• CPC Class Codes: F16N 7/32 Mist lubrication splash lubrication F16N7/26

Abstract

A system and related method are provided for lubricating an interior surface of a device, such as the inner diameter surface of a syringe barrel. A fixture is provided for receiving and supporting the syringe barrel with an open rear end in alignment with a lubricant spray nozzle and an open front end in alignment with a counterflow air nozzle. Lubricant is sprayed via the lubricant spray nozzle into the syringe barrel in counterflow relation to an air flow discharged through the air nozzle, resulting in turbulent lubricant atomization and dispersal as a substantially uniform surface coating of interior surfaces of the syringe barrel.

Claims

1. A system for lubricating interior surfaces of a syringe barrel having an open rear end and an open front end, said system comprising:

a fixture for receiving and supporting a syringe barrel;

first spray means for delivering a lubricant spray into the open rear end of the syringe barrel supported by said fixture; and

second spray means for delivering a counterflow spray into the syringe barrel through the open front end thereof, in opposition to the lubricant spray, to result in turbulent dispersal of the lubricant spray within the syringe barrel so that interior barrel surfaces are coated with a substantially uniform surface coating of lubricant.

2. The system of claim 1 wherein said fixture supports the syringe barrel in a generally vertical orientation with the open front end thereof presented in an upward direction.

3. The system of claim 1 wherein said first and second spray means include a pair of spray nozzles mounted on said fixture in opposed, generally coaxially aligned relation.

4. The system of claim 3 wherein said fixture supports the syringe barrel with the open rear and front ends thereof and an open end of narrower diameter than said rear end, said mounting step including said first and second spray nozzles, respectively.

5. The system of claim 1 wherein said second spray means delivers a counterflow air spray through the open front end of the syringe barrel.

6. The system of claim 1 wherein said first spray means delivers a liquid-based lubricant spray into the syringe barrel.

7. The system of claim 1 further including control means for simultaneously operating said first and second spray means.

8. The system of claim 1 wherein the syringe barrel comprises a generally cylindrical barrel body defining said open rear end and having a forward end connected by a neck of reduced cross sectional size to said open front end, and wherein said fixture includes a support wall defining a laterally open recess for seated reception of the neck of the syringe barrel.

9. A system for lubricating interior surfaces of a hollow device having opposite open ends, said system comprising:

a fixture for receiving and supporting the device;

first spray means for delivering a lubricant spray into one end of the device; and

second spray means for delivering a counterflow spray into the opposite end of the device, in opposition to the lubricant spray, to result in turbulent dispersal of the lubricant spray so that interior surfaces of the device are coated with a substantially uniform surface coating of lubricant.

10. The system of claim 9 wherein the lubricant spray is a liquid lubricant, and wherein the counterflow spray is air.

11. The system of claim 9 wherein said wherein said first and second spray means include a pair of spray nozzles mounted on said fixture in opposed, generally coaxially aligned relation.

12. The system of claim 11 wherein said fixture supports the device in a generally vertical orientation positioned between, and aligned with, said first and second spray nozzles, respectively.

13. The system of claim 9 further including control means for simultaneously operating said first and second spray means.

14. A method of lubricating interior surfaces of a device having opposite open ends, said method comprising the steps of:

spraying a lubricant spray into one end of the device; and

spraying a counterflow spray into the opposite end of the device, in opposition to the lubricant spray, to result in turbulent dispersal of the lubricant spray so that interior surfaces of the device are coated with a substantially uniform surface coating of lubricant.

15. The method of claim 14 wherein said lubricant spraying step comprise spraying a liquid lubricant into the device, and wherein said counterflow spraying step comprises spraying a counterflow air flow into the device.

16. The method of claim 15 including the step of mounting the device on a fixture in a vertical orientation.

17. The method of claim 16 wherein said lubricant spraying step comprises spraying the lubricant upwardly into the device, and wherein said counterflow spraying step comprises spraying the counterflow spray downwardly into the device.

18. The method of claim 17 wherein the device is a syringe barrel having an open rear end and an open end of narrower diameter than said rear end, said mounting step including mounting the syringe barrel on the fixture in a vertical orientation with the front end presented upwardly.