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US 12,653,934 B2Granted
Apparatus for extracorporeal blood treatment
AssigneeFresenius Medical Care Deutschland GmbH
InventorFrank Biermann
Life of this patent
Estimating the term…
Abstract
A pressure-measuring device according to the invention has a hydrophobic membrane, which is air permeable in the dry state and air impermeable in a moistened state, and a pressure sensor, which is in mechanical contact with the hydrophobic membrane and which is designed to follow a movement of the membrane. During the filling of a line system, air is separated via the hydrophobic membrane and, in the air-impermeable state, the pressure in the line system is measured by means of the moistened hydrophobic membrane.
Claims15
A pressure-measuring device comprising:
- a hydrophobic membrane, which is air permeable in the dry state and air impermeable in a moistened state;
- a pressure sensor, which is in mechanical contact with the hydrophobic membrane and which is designed to follow a movement of the membrane;
- a first chamber, which is arranged on a front side of the hydrophobic membrane;
- and
- a second chamber, which is arranged on a rear side of the hydrophobic membrane, wherein
- the pressure sensor is arranged in the second chamber on the hydrophobic membrane.
3 more elements
Dependencies are inferred from the claim text.