Normally closed check valve

• US 4,535,820 A
• Filed: 05/24/1984
• Issued: 08/20/1985
• Est. Priority Date: 05/24/1984
• Status: Expired due to Term

• Current Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Original Assignee: Burron Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Inventors: Raines, Kenneth C.
• Primary Examiner(s): Schwadron, Martin P.
• Assistant Examiner(s): Novack, Sheri
• Application Number:
  US06/613,644
• Time in Patent Office: 453 Days
• Field of Search: 137/843, 137/851, 137/852, 137/854, 137/515, 137/798
• US Class Current: 137/854
• CPC Class Codes: A61M 2039/242 designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid
• CPC Class Codes: A61M 2039/2433 Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
• CPC Class Codes: A61M 2039/2466 being fixed in its center
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: F16K 15/141 the closure elements not being fixed to the valve body
• CPC Class Codes: F16K 15/148 the closure elements being fixed in their centre
• CPC Class Codes: Y10T 137/789 Central mount

Abstract

A normally closed, one-way check valve having a body composed of two cylindrical containers which complement each other, each of said containers having a tubular projection with a liquid opening therethrough, one of said cylindrical chambers provided with a plurality of longitudinally extending ribs therealong for preventing sticking of a valve disc as contained within an assembled valve device, also further including a traverse bar for pressing against a valve disc. The other body component is provided with a pointed triangular support and also a plurality of radially extending ribs for preventing a valve disc from opening so far as to close off the egress port provided with said second element, together with a rubber resilient valve disc which is retained between the pointed triangular support and the traverse bar when the unit is assembled by sonic welding into a permanently assembled device. A further embodiment provides for a permanent dimple in the valve disc prior to assembly of the component elements, while a further embodiment provides a valve disc with an elongated groove or recess of somewhat oval shape for reception of the pointed triangular support member of the second body component.

Claims

1. A valve device comprising:

a first body element having an input opening therethrough;

a second body element which complements said first body element and having an outlet opening therefrom;

a resilient valve disc mountable between said first and second body elements;

first means with one body element for supporting the disc at the center thereof;

means with the other body element for holding said disc firmly against said first means in such a manner that said disc is restrained from sideways movement; and

wherein said disc element is round, and both said first and second body elements have round container portions in which said disc element upon mounting is suitably spaced from the edges thereof, and wherein said means for preventing sideways movement of said disc element includes pressure between said two body element means for partially deforming the center area of said disc to restrain same against sideways movement.

2. The valve of claim 1, together with further means for preventing the disc from blocking the path of fluid flow in the open direction thereof.

3. The valve of claim 2, together with additional means for preventing the circumferential edge of the disc from binding or sticking against the sides of the body element it is most closely adjacent to.

4. The valve of claim 3, wherein said means for preventing the disc edge from binding against the sides of the body element comprise ribs which extend lengthwise of the inner circumferential wall of said body element.

5. The valve of claim 2, wherein said further means for preventing the disc from blocking the path of fluid flow include a plurality of radially extending ribs along the floor of the other body element having the outlet opening therethrough.

6. The valve of claim 1, wherein said means with one body element for supporting the disc at the center thereof comprises a pointed triangular member which makes a depression directly in the smooth surface of the flexible rubber valve disc.

7. The valve of claim 6, wherein said valve disc is normally flat on both surfaces and is only deformed at the center thereof under pressure between said first and second means.

8. The valve of claim 6, wherein at least one surface is provided with a dimple for receiving said triangular point of said second body element.

9. The valve of claim 6, wherein at least one surface is provided with an elongated oval recess for receiving said triangular point of said second body element.

10. A normally closed one-way check valve comprising:

a first cylindrical chamber having an opening centrally thereof;

a second cylindrical chamber having an opening centrally thereof, said first cylindrical chamber having a slightly smaller external diameter than the internal diameter of said second cylindrical chamber so that it complements and fits inside thereof for forming an overall closed chamber body element;

one of said cylindrical chambers provided with a traverse bar thereacross;

said same cylindrical chamber being provided with a plurality of longitudinal ribs circumferentially around the inner wall of said cylindrical chamber;

the other cylindrical chamber provided with a pointed support member together with a plurality of radially ribs;

a resilient disc mounted in compression between said pointed support member and said traverse bar in such a manner that a depression is made in the central area of said disc so that said disc is restrained from sideways movement within the valve body element chamber.

11. The normally closed one-way check valve of claim 10, wherein said disc is normally flat on both sides except for the central area which is slightly deformed during assembly of the component elements of the valve device.

12. The normally closed one-way check valve of claim 10, wherein at least one surface of said disc is provided with a permanent dimple for receiving said pointed support member of said second body element.

13. The normally closed one-way check valve of claim 10, wherein at least one surface is provided with an elongated oval recess for receiving said pointed support member of said second body element.

14. The normally closed one-way check valve of claim 10, wherein said opening in said first cylindrical chamber comprises a tubular projection having a female lauer input taper thereto and retainer projections externally thereof.

15. The normally closed one-way check valve of claim 14, wherein said second cylindrical chamber is provided with dual integral tubular projections, one of said integral tubular projections including the central opening therethrough, and the other integral tubular projection being internally threaded for receiving liquid flow structure connected thereto.

16. The normally closed one-way check valve of claim 15, wherein said body component elements are sonically welded together to provide a non-disassembleable valve device.

17. The normally closed one-way check valve of claim 16, wherein said resilient valve disc is made of rubber material.