Quick-disconnect valve

• US 5,353,837 A
• Filed: 05/22/1992
• Issued: 10/11/1994
• Est. Priority Date: 03/04/1986
• Status: Expired due to Term

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Faust, Valentine
• Primary Examiner(s): RIVELL, JOHN A
• Application Number:
  US07/887,732
• Time in Patent Office: 872 Days
• Field of Search: 137/614.18, 137/614.19, 251/149.6, 251/149.7, 604/249, 604/326, 604/905
• US Class Current: 137/614.18
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• 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 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: A61M 5/152 pressurised by contraction of elastic reservoirs containers for dispensing contents by contraction of an elastic bag provided therein, in general B65D83/0061
• CPC Class Codes: A61M 5/162 Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube in jet-action syringes A61M5/30; connectors for tubes having sealed ends and a needle for piercing them A61M39/14
• 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 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281
• CPC Class Codes: A61M 5/365 Air detectors A61M5/1684 takes precedence; in extracorporeal blood circuits A61M1/3626
• CPC Class Codes: B67D 7/0255 squeezing collapsible or flexible storage containers for dispensing beverages on draught B67D1/0462
• CPC Class Codes: F04B 43/043 Micropumps
• CPC Class Codes: F16K 31/004 actuated by piezoelectric means
• CPC Class Codes: F16K 31/005 Piezoelectric benders
• CPC Class Codes: G01F 1/34 by measuring pressure or differential pressure
• CPC Class Codes: G01F 1/66 by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
• CPC Class Codes: G01F 17/00 : Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies measuring linear dimensions to determine volume G01B
• CPC Class Codes: G01P 13/0066 : by using differences of pressure in the fluid
• CPC Class Codes: Y10S 604/905 : Aseptic connectors or couplings, e.g. frangible, piercable
• CPC Class Codes: Y10T 137/88038 : One valve head carries other valve head

Abstract

A normally-closed valve that can be easily connected and disconnected. Disposed in the fluid passageway through the valve is a cylindrical member that may be moved between an open position and a closed position. A spring holds the member in the closed position, and a leur-type cannula may be inserted into the valve to push the member into the open position. Two sealing rings are mounted around the cylindrical member. These rings prevent flow through the valve when the member is in its closed position. Two sets of channels are placed in the walls of the passageway to permit flow around the sealing rings when the member is in its open position.

Claims

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

a fluid passageway bounded by a wall and having first and second ports, the first port adapted to receive a cannula;

a movable member having first and second ends and a perimeter surface, the movable member being disposed in the fluid passageway, and being displaceable, in a direction parallel to overall fluid flow through the valve, to an open position, wherein fluid may pass through the valve, and to a closed position, wherein fluid is prevented from passing through the valve, such that when the movable member is in the closed position it is closer to the first port than when it is in the open position, and such that the movable member may be moved from the closed position to the open position by a cannula inserted through the first port;

biasing means for urging the movable member away from the open position towards the closed position;

first sealing means, located between the movable member and the passageway wall, for preventing flow between the passageway wall and the perimeter surface of the movable member when the movable member is in the closed position; and

first channel means for permitting flow between the first sealing means and the passageway wall when the movable member is in its opened position;

wherein the first sealing means is mounted on the perimeter surface of the movable member, and the first channel means is mounted in the passageway wall; and

further including

second sealing means, mounted on the perimeter surface of the movable member, for preventing flow between the passageway wall and the perimeter surface of the movable member when the movable member is in the closed position, the first sealing means being mounted closer to the first end of the movable member and the first port than the second sealing means; and

second channel means, mounted in the passageway wall, for permitting flow between the second sealing means and the passageway wall when the movable member is in the open position.

2. A valve according to claim 1, wherein the second port is in fluid communication with an intravenous line.

3. A valve according to claim 1, wherein the passageway is wider between first and second channel means than at the first channel means, so as to permit the second sealing means to move between the first and second channels, but not past the first channel means.