Title:
LIQUID PRESSURE MEASURING SYSTEM, ITS REGULATING METHOD AND BLOOD TREATMENT UNIT
Document Type and Number:
Japanese Patent JP3690846
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pressure measuring system capable of keeping the measured value reliable no matter how long the system is used.
SOLUTION: This system includes pressure sensors 38, 45 sensitive to variation in gas pressure, a casing 30 divided into a first compartment 31 having at least one opening for introducing liquid through a flexible membrane 33 and a second compartment 32 connectable to the pressure sensors 38 in a leaktight manner, and a pumping device 41 for varying the gas volume in the second compartment 32. The system further includes a control device 27 for driving the pumping device 41 with the pressure variations in the second compartment as the function to regulate the position of the flexible membrane 33 between the wall of the casing 30 defining the first compartment 31 and the wall of the casing 30 defining the second compartment 32.
Inventors:
Jack chevalet
Alan Frugier
Eric Rube
Alan Frugier
Eric Rube
Application Number:
JP23717095A
Publication Date:
August 31, 2005
Filing Date:
September 14, 1995
Export Citation:
Assignee:
Ospal Andeustri
International Classes:
A61M1/14; G01L7/00; A61M1/36; G01L11/00; A61M1/16; (IPC1-7): A61M1/14; G01L7/00
Domestic Patent References:
| JP5617298Y2 | ||||
| JP2524238B2 | ||||
| JP622610B2 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Kenji Kaneko
Yukio Iwamoto
Hajime Asamura
Kenji Kaneko
Yukio Iwamoto
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