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Circuit for biological liquid

  • US 9,051,929 B2
  • Filed: 01/11/2011
  • Issued: 06/09/2015
  • Est. Priority Date: 01/13/2010
  • Status: Active Grant
First Claim
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1. A circuit for biological liquid, comprising a plurality of routing connectors (2) and a network (3;

  • 103) for routing liquid between said connectors, comprising;

    a bag (11;

    111) comprising two flexible films (45, 46;

    145, 146) and said routing network connectors (2); and

    a press (10;

    110) comprising a first shell (14;

    114) and a second shell (13;

    113) clamping said bag (11;

    111) in a state in which pipes (4;

    104) of said liquid routing network (3;

    103) are formed between said films (45, 46;

    145, 146), said first shell (14;

    114) comprising for each of said pipes (4;

    104) a shaping channel (18;

    118), said second shell (13;

    113) comprising for each of said pipes (4;

    104) a shaping channel (16;

    116) facing a corresponding shaping channel (18;

    118) of the first shell (14;

    114);

    with said first shell (14;

    114) comprising at least one pinch valve (20;

    120) for one of said pipes (4;

    104), wherein the valve (20;

    120) comprises an actuator (21;

    121) comprising a moveable pinching member (24;

    124), wherein the valve (20;

    120) has an open position in which the moveable member (24;

    124) is in a retracted position in which it does not pinch the pipe (4;

    104) and has a closed position in which the moveable member (24;

    124) is in an extended position in which it pinches the pipe (4;

    104);

    said valve (20;

    120) further comprising, in register with said moveable pinching member (24;

    124), an elastically compressible pad (31;

    131), wherein the pad (31;

    131) has a first face (32;

    132) nearest the moveable member (24;

    124) and a second face (33;

    133) nearest the pipe corresponding to said pinching member (4;

    104), wherein the pad (31;

    131), when the valve (20;

    120) is in an open position, has a resting configuration in which said second face (33;

    133) is concave and locally delimits the first shell shaping channel (18;

    118) of the pipe to pinch (4;

    104), and, when the valve (20;

    120) is in said closed position, has a pinching configuration in which said second face (33;

    133) is convex, with said pipe (4;

    104) and said pad (31;

    131) sandwiched between the second shell shaping channel (16;

    116) of the pipe to pinch (4;

    104) and the moveable pinching member (24;

    124).

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