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US 7,603,907 B2Granted
Membrane unit, housing of a pressure measuring unit and pressure measuring unit
AssigneeFresenius Medical Care Deutschland GmbH
InventorsReinhold Reiter, Marco Caronna
Life of this patent
Estimating the term…
Abstract
A membrane unit configured for use in a housing of a pressure measuring unit, preferably for measuring pressure in an extra-corporal blood circuit, has a flexible membrane and a fixing ring which is integral with the membrane so that the membrane and the fixing ring form a one-piece element. The fixing ring has a lower flexibility than the membrane, and has fixing elements for fixing the fixing ring to the pressure measuring housing.
Claims20
A membrane unit configured for use in a housing of a pressure measuring unit for measuring pressure of blood in an extra-corporeal blood circuit, comprising:
- a flexible membrane and a fixing ring which is integral with the membrane such that the membrane and the fixing ring form a one-piece element, the fixing ring having a lower flexibility than the membrane and the fixing ring including at least one fixing element for fixing the fixing ring to the housing,
- a contact surface between the membrane and the fixing ring being not flat and having at least one projection extending from at least one of the membrane and the fixing ring, the projection engaging with at least one groove in the other of the membrane and the fixing ring.
Dependencies are inferred from the claim text.