Miniature pressure transducer
US4413528A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Apr 15, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an exemplary embodiment, an electrical signal is to be generated corresponding to the pressure to be measured. The pressure transducer is formed by an outer tube in which a measuring cell as well as a liquid line connected to a liquid reservoir are disposed. In order to be able to calibrate the pressure transducer at the respective place of measurement, for example, a blood vessel, the disclosure provides that the open end of the outer tube is closed by a one-way valve through which fluid can only flow out in the direction from the tube. When a slight, specific underpressure is set, the one-way valve closes and the pressure transducer can be calibrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.