A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 1/02 (2006.01) A61M 1/00 (2006.01) A61M 5/40 (2006.01)
Patent
CA 2101444
ABSTRACT A method and a device designed to suck and to con- vey various types of liquids through a suction hose (45) and at the same time dose (4) an additive to the liquid in an accurate proportion to the amount of the sucked liquid, a liquid or a liquid/air/gas mixture being sucked by means of a suction nozzle (2, 45), which is influenced by a certain pressure P2 with a moderate suction action, and being passed through the suction hose (45), a dosage device (4), which comprises a flexible dosage container (20), which is enclosed in a rigid casing (21) and which is influenced by a certain relatively lower pressure P3 (stronger suction action) than the pressure in the suction hose (45), being connected directly to the suction hose (45), the pressure gradient P2- P3 being adjusted in such a way, that no additive is intro- duced, when only air/gas is sucked through the suction hose (45), whereas an additive does flow into the suction hose (45) as soon as some amount of liquid is sucked through the suction hose, and the amount of dosed additive being propor- tional to the amount of sucked liquid. The suction hose (45) possibly is connected to a separation and defoaming filter (3), which in its turn may be connected to a de-air receiver (5) with means designed to de-air the sucked liquid as well as to store the liquid without any admixture of gas/air.
Olsson Per
Stromberg Lennart
Malcolm Johnston & Associates
Medical Projects Hb
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