Microdosing apparatus and method for dosed dispensing of liquids
First Claim
1. A microdosing apparatus, comprising:
- a fluid conduit having a flexible tube with a first end for connecting to a liquid reservoir and a second end where an outlet opening is located; and
an actuating device having a displacer with adjustable hub, by which the volume of a portion of the flexible tube can be changed, to thereby dispense liquid as free flying droplets or as free flying jet at the outlet opening by moving the displacer between a first end position and a second end position, wherein the tube is partly compressed at least in the first end position or the second end position.
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Accused Products
Abstract
A microdosing apparatus comprises a fluid conduit having a flexible tube with a first end for connecting to a fluid reservoir and a second end where an outlet opening is located. An actuating device with a displacer with adjustable hub is provided, by which the volume of a portion of the flexible hub can be changed to thereby dispense liquid as free flying droplets or as free flying jet at the outlet opening by moving the displacer between a first end position and a second end position, whereby the tube is partly compressed in the first or the second end position. In other words, a microdosing apparatus comprises fluid conduit having a portion along which a cross section of the fluid conduit is variable by an actuating device to effect a change of the volume of the fluid conduit. A ratio of a fluidic impedance between the position of the actuating device and the outlet opening to a fluidic impedance between a first end of the fluid conduit and the position of the actuating device is variable by changing the position of the actuating device, so that a dosing volume dispensed at the outlet opening is variable thereby by at least 10%.
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Citations
30 Claims
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1. A microdosing apparatus, comprising:
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a fluid conduit having a flexible tube with a first end for connecting to a liquid reservoir and a second end where an outlet opening is located; and
an actuating device having a displacer with adjustable hub, by which the volume of a portion of the flexible tube can be changed, to thereby dispense liquid as free flying droplets or as free flying jet at the outlet opening by moving the displacer between a first end position and a second end position, wherein the tube is partly compressed at least in the first end position or the second end position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13, 14, 15, 16, 17, 18, 19)
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9. A microdosing apparatus, comprising:
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a fluid conduit with a first end for connecting to a fluid reservoir and a second end where an outlet opening is located, the fluid conduit having a portion along which a cross section of the fluid conduit can be varied to effect a change of the volume of the fluid conduit;
an actuating device disposed at a position along the portion of the fluid conduit for effecting a change of the volume of the fluid conduit to thereby dispense liquid as free flying droplets or free flying jet from the outlet opening, wherein a ratio of a fluidic impedance between the position of the actuating device and the outlet opening to a fluidic impedance between the first end and the fluid conduit and the position of the actuating device is variable by changing the position of the actuating device, so that a dosing volume dispensed at the outlet opening is thereby variable by at least 10%. - View Dependent Claims (10, 11, 12)
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20. A method for dosed dispensing of liquids, comprising the steps of:
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filling a fluid conduit having a flexible tube with a liquid to be dosed;
effecting a volume change of a portion of the flexible tube by a displacer with adjustable hub, to thereby dispense liquid as free flying droplets or as free flying jet at an outlet opening of the fluid conduit by moving the displacer between a first end position and a second end position, wherein the tube is partly compressed at least in the first end position or the second end position. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for adjusting a desired dosing volume during a dosing process by using a microdosing apparatus comprising:
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a fluid conduit with a first end for connecting to a fluid reservoir and a second end where an outlet opening is located, the fluid conduit having a portion along which a cross section of the fluid conduit can be varied to effect a change of the volume of the fluid conduit;
an actuating device disposed at a position along the portion of the fluid conduit for effecting a change of the volume of the fluid conduit to thereby dispense liquid as free flying droplets or free flying jet from the outlet opening, wherein a ratio of a fluidic impedance between the position of the actuating device and the outlet opening to a fluidic impedance between the first end and the fluid conduit and the position of the actuating device is variable by changing the position of the actuating device, so that a dosing volume dispensed at the outlet opening is thereby variable by at least 10%;
the method comprising the step of;
disposing the actuating device at a predetermined position along the portion of the fluid conduit, so that due to the resulting ratio of fluidic impedances in the step of effecting a change of the volume of the fluid conduit, a desired dosing volume can be dispensed at the outlet opening.
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30. A method for adjusting a desired dosing volume in a dosing process by using a microdosing apparatus comprising:
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a fluid conduit with a first end for connecting to a fluid reservoir and a second end where an outlet opening is located, the fluid conduit having a portion along which a cross section of the fluid conduit can be varied to effect a change of the volume of the fluid conduit;
an actuating device disposed at a position along the portion of the fluid conduit for effecting a change of the volume of the fluid conduit to thereby dispense liquid as free flying droplets or free flying jet from the outlet opening, wherein a ratio of a fluidic impedance between the position of the actuating device and the outlet opening to a fluidic impedance between the first end and the fluid conduit and the position of the actuating device is variable by changing the position of the actuating device, so that a dosing volume dispensed at the outlet opening is thereby variable by at least 10%;
wherein the actuating device has a displacer by which the portion of the fluid conduit can be compressed across a predetermined length to effect the volume change of the portion of the fluid conduit;
the method comprising the step of;
selecting a displacer with an axial length with regard to the portion of the fluid conduit, which is adapted to allow dispensing of a desired dosing volume at the outlet opening in the step of effecting a change of the volume of the fluid conduit.
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Specification