Pressure transducer
US4297890A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1980 |
| Grant date | Nov 3, 1981 |
| Priority date | — |
| Expiry date | May 21, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.