Quick-disconnect valve

• US 5,116,021 A
• Filed: 08/22/1991
• Issued: 05/26/1992
• Est. Priority Date: 03/04/1986
• Status: Expired due to Fees

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Kamen, Dean L., Faust, Valentine
• Primary Examiner(s): RIVELL, JOHN A
• Application Number:
  US07/748,341
• Time in Patent Office: 278 Days
• Field of Search: 251/149, 251/149.1, 251/149.3, 251/155
• US Class Current: 251/149.1
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 39/26 Valves closing automatically on disconnecting the line and opening on reconnection thereof check valves A61M39/24
• CPC Class Codes: A61M 5/16809 by repeated filling and emptying of an intermediate volume pressure infusion using positive displacement pumps A61M5/142
• CPC Class Codes: A61M 5/16813 by controlling the degree of opening of the flow line
• CPC Class Codes: A61M 5/16859 Evaluation of pressure response, e.g. to an applied pulse
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: F04B 43/043 Micropumps
• CPC Class Codes: F16K 31/005 Piezoelectric benders
• CPC Class Codes: G01P 13/0066 by using differences of pressure in the fluid

Abstract

A normally-closed valve that can be easily connected and disconnected. Disposed in the fluid passageway through the valve is a flexible, resilient disk and a pin mounted adjacent to the disk. The disk is mounted in a wide portion of the passageway and is held in place by the narrow portions of the passageway. The disk fits snugly into the passageway so that the edge of the disk forms a seal with the wall of the passageway. A nozzle is inserted into the passageway and urges the pin against the disk, causing the disk to deform. When the disk deforms, its effective diameter decreases, and its edge separates from the passageway wall, permitting fluid to flow through the valve. The narrow sections of the passageway wall have channels disposed therein for permitting flow when the disk is deformed. The pin also has channels on its surface to permit flow around it.

Claims

1. A valve for permitting flow of a fluid therethrough when actuated by a nozzle, and otherwise preventing flow of fluid therethrough, the valve comprising:

a fluid passageway bounded by a wall; and

a relatively flat resilient seal member having an edge and a central portion, the seal member being disposed transversely to the fluid passageway such that the edge of the seal is normally disposed against the wall of the fluid passageway so as to prevent the flow of fluid past the seal member, and such that, when the central portion of the seal member is urged in a direction generally parallel to the fluid passageway, the seal member deforms such that the central portion is displaced and such that the edge of the seal member separates from the wall so that fluid may flow through the passageway by passing between the wall and the seal member.

2. A valve according to claim 1 further including

means, responsive to actuation by the nozzle, for urging the central portion of the seal member in a direction generally parallel to the fluid passageway so as to deform the seal member and to cause the edge of the seal member away from the wall such that fluid may flow through the passageway.

3. A valve according to claim 2, wherein the central portion of the seal member has a first face and a second face, and

wherein the urging means includes a pin disposed in the fluid passageway adjacent to the first face of the seal member, such that, when the pin is pressed by the nozzle, the pin urges the central portion of the seal member in a direction generally parallel to the passageway.

4. A valve according to claim 3, wherein the fluid passageway has a first narrow section, a second narrow section and a wide section disposed between the two narrow sections, and

wherein the seal member is disposed in the wide section.

5. A valve according claim 4, wherein a first channel is disposed in the wall of the fluid passageway between the first narrow section and the wide section, and a second channel is disposed in the wall between the wide section and the second narrow section, so as to permit flow through the channels when the seal member is deformed by the pin.

6. A valve according to claim 5, wherein the pin has a channel disposed on the surface thereof so as to permit flow past the pin, when the pin is pressed against the seal member by the nozzle.

7. A valve according to claim 6, wherein the wall in first narrow section has a lip disposed thereon, and wherein the pin has a shoulder disposed thereon, such that the lip keeps the pin within the passageway.

8. A valve according to claim 1, further including means for obstructing the movement of the edge of the sealing member with respect to the passageway wall in a direction parallel to the passageway, as the central portion of the seal member is being urged in said parallel direction and the edge is moving away from the passageway wall.

9. A valve according to claim 2, further including means for obstructing the movement of the edge of the sealing member with respect to the passageway wall in a direction parallel to the passageway, as the central portion of the seal member is being urged in said parallel direction and the edge is moving away from the passageway wall.

10. A valve according to claim 3, further including means for obstructing the movement of the edge of the sealing member with respect to the passageway wall in a direction parallel to the passageway, as the central portion of the seal member is being urged in said parallel direction and the edge is moving away from the passageway wall.

11. A valve according to claim 10, wherein the pin has a channel disposed on the surface thereof so as to permit flow past the pin, when the pin is pressed against the seal member by the nozzle.

12. A valve according claim 11, further including means, disposed in the obstruction means, for permitting flow through the obstruction means when the seal member is deformed by the pin.

13. A valve according to claim 12, wherein the means for permitting flow includes a channel.

14. A valve according claim 8, further including means, disposed in the obstruction means, for permitting flow through the obstruction means when the seal member is deformed by the pin.

15. A valve according to claim 14, wherein the means for permitting flow includes a channel.