Measuring and testing – Fluid pressure gauge – With protective separator
Patent
1979-04-02
1980-10-07
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
With protective separator
73715, 128214E, 128DIG13, 210 90, G01L 708
Patent
active
042261244
ABSTRACT:
Apparatus for protecting a pressure sensitive transducer in an extracorporeal blood system and for providing a sterile barrier while the apparatus transmits the blood pressure to the pressure sensitive transducer. The apparatus includes a pressure chamber having a lateral inlet and a lateral outlet, to enable convenient packaging, and having a membrane disposed transverse the chamber and surrounded by the chamber to segregate an inlet side of the chamber from the outlet side of the chamber. The membrane has a generally planar, circular center portion which lies in a plane between the outer peripheral portion of the membrane and the outlet side of the chamber. The membrane has an intermediate portion contiguous with and between the central portion and the outer peripheral portion, with the intermediate portion having a generally U-shaped cross-sectional configuration. The central portion has a substantially greater thickness than the thickness of the intermediate portion, providing a superior displacement of the membrane during operation.
REFERENCES:
patent: 2385382 (1945-09-01), Samiran
patent: 2948151 (1960-08-01), Astl
patent: 4077882 (1978-03-01), Gangemi
Baxter Travenol Laboratories Inc.
Flattery Paul C.
Gerstman George H.
Woodiel Donald O.
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