Disposable cassette having a sealing membrane and a valve actuator therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 22, 2004
Grant Date -
May 23, 2002
app pub date -
Oct 29, 2001
filing date -
Oct 27, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus for the supply or branching off of a secondary flow into or out of a main flow of a medical fluid, including a fluid guide body in which at least one main passage open to one side and at least one secondary passage opening into the main passage are provided. A covering film is disposed on the fluid guide body above the open side of the main passage. The orifice of the secondary passage into the main passage can be closed by the covering film. In order to improve the haemocompatibility of the apparatus, the main passage is formed free of wake space in the region of the orifice of the secondary passage. To reduce flow losses, the secondary passage in the main passage has a streamlined outer contour in accordance with the invention corresponding to the flow direction of the main flow in the main passage. The orifice of the secondary passage is vertically coincident with the adjacent rims of the main passage so that the secondary passage can be closed by a planar valve plunger by pressing on the covering film.
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