Micron chamber I.V. with support ring

• US 4,664,800 A
• Filed: 03/18/1985
• Issued: 05/12/1987
• Est. Priority Date: 03/18/1985
• Status: Expired due to Fees

• Current Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Original Assignee: Burron Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Inventors: McGaughey, John, Raines, Kenneth
• Primary Examiner(s): Fisher, Richard V.
• Assistant Examiner(s): WALKER, WANDA LYNNE
• Application Number:
  US06/712,677
• Time in Patent Office: 785 Days
• Field of Search: 210/645, 210/927, 210/445, 210/446, 210/447, 210/453, 210/455, 210/321.1, 210/232, 210/435, 210/450, 210/451, 210/454, 604/126, 604/252
• US Class Current: 210/445
• CPC Class Codes: B01D 29/01 with flat filtering elements B01D29/39 takes precedence

Abstract

A small micron filter unit comprising a main body connector unit, a single structure filter element, and an adapter unit for complementary engagement with the connector and for receiving and holding the single filter element. Preferably, the adapter unit is of soft material, such as flexible PVC, which allows the adapter unit to expand and receive a ring with ridge of the single filter element within a recess thereof. The ridge on the external circumference of the filter element ring forms a resilient indent in the flexible PVC material of the adapter. The compressive force exerted by the adapter around the filter ring functions to securely retain it in place and also forms a fluid and air axial seal. After assembly of the adapter unit within the connector body unit, an overall leakproof component filter device is formed. For further assurance of leakproofness, a plastic solvent such as THF can be applied between the adapter and connector units externally at the junction thereof for forming a permanently bonded component filter device.

Claims

1. A micron filter device comprising:

rigid connector means for attachment to a liquid supply;

a single integral filter means;

a soft base adapter means for receiving and holding said single integral filter means;

multiple means for retaining said connector means, filter means and base adapter means together in an assembled relationship;

said rigid connector means comprising a cylindrical main body member having at least one cup-like portion for receiving said single integral filter means and said soft base adapter means therewithin;

said single integral filter means including a support ring together with a central filter membrane completely across the inside of said support ring; and

said support ring being completely around the circumference of the filter membrane.

2. The micron filter device defined in claim 1, wherein said multiple means for retaining said components together includes a ridge formed on the support ring of said single filter means around the circumference thereof, and said soft base adapter means expanding and contracting around said ridge when the filter means and base adapter means are assembled together.

3. The micron filter device defined in claim 2, wherein said multiple means further includes said rigid connector means exerting a compression force on said soft base adapter means after said single filter means has been mounted therewith.

4. The micron filter device defined in claim 3, together with plastic solvent added at the external junction between said rigid connector means and said soft base adapter means for preventing any axial movement therebetween after the final assembly thereof.

5. The micron filter device defined in claim 1, wherein said soft base adapter means includes a pair of cup-like cylinders back-to-back, with one of said cup-like cylinders being provided with a single filter receiving means therewithin.

6. The micron filter device defined in claim 5, wherein said single filter receiving means of said one cup-like cylinder comprises a recess provided in said one cup-like cylinder for the purpose of receiving said ring of the single filter means therewithin.

7. The micron filter device defined in claim 1, wherein said main body member further includes a pair of spaced cylinders on the main body member opposite to said cup-like portion.

8. The micron filter defined in claim 1, wherein said membrane has pores of approximately 15 micron size, and both said membrane and support ring are integrally molded from nylon.

9. A 15 micron filter device comprising:

11. The 15 micron filter device defined in claim 9, wherein said single integral filter element is molded in one piece of nylon.

12. The 15 micron filter device defined in claim 9, wherein said connector unit is formed of rigid PVC.

13. The 15 micron filter device defined in claim 9, wherein said base adapter is formed of soft PVC.

10. a connector unit for use as a main body of the filter, a base adapter for complementary reception within said connector unit, a single integral filter element having a circumferential support ring completely therearound mounted between said connector unit and said base adapter, and multiple means cooperating with said filter ring for retaining said components together in assembled relationship.