Measuring and testing – Fluid pressure gauge – Electrical
Patent
1980-05-21
1981-11-03
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Electrical
128673, 128675, 338 38, G01L 902
Patent
active
042978904
ABSTRACT:
In an exemplary embodiment, a measuring cell is formed by an interior tube open at one end and within a surrounding exterior tube. The interior tube is adapted to contain a gas while a chamber within the exterior tube at the open end of the interior tube can be filled with a pressure transmission liquid via a channel extending within the exterior tube and along the length of the interior tube and leading to the chamber. For a pressure measurement, the liquid in the chamber can communicate directly with a liquid in a liquid vessel, e.g. a blood vessel. In the measuring cell electrodes are arranged for generating an electric signal which corresponds to the gas volume in the measuring cell and thus the liquid pressure in the chamber. The measuring cell is disposed with its open end opposite a lateral opening in the wall of the exterior tube. The lateral opening communicates with the chamber at a location transversely offset relative to the open end of the measurement cell and disposed so as to facilitate and safeguard preparation of the device for a pressure measurement.
REFERENCES:
patent: 2769070 (1979-09-01), Donald
patent: 3911902 (1975-10-01), Delphy
patent: 3942382 (1976-03-01), Hok
patent: 4261208 (1981-04-01), Hok et al.
Siemens Aktiengesellschaft
Woodiel Donald O.
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