Apparatus for sensing pressure
US4022190A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1974 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Jul 16, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure sensor apparatus primarily for sensing pressure in a body cavity such as the cranium, bladder or vena cava of an animal or human comprising a housing having a diaphragm dividing the interior of the housing into two chambers. A member containing filter material is connected to the housing and communicates with one of the chambers formed in the housing. The other chamber contains radioactive fluid and is connected to a variable volume chamber that receives a volume of radioactive fluid which is proportional to the pressure sensed by the flexible member. A radiation detector senses the volume of radioactive fluid in the variable volume chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.