Pressure monitoring and leak detection method and apparatus
US4441357A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1982 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | Mar 4, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A closed pressure monitoring system (20) is disclosed in which a pump (27) delivers gas on a supply line (22, 29) through a first accumulator chamber (30) to a load device (21) and returns the gas on a return line (23, 28) through a second accumulator chamber (34) to the pump (27). After pressures in the first and second chambers stabilize, the pressures are compared, and a leak warning signal is given if the compared pressures changed with respect to one another over time. The system is particularly adapted to use a pressure sensor as the load (21) which is implanted within a human patient. The pressure sensor receives air from a restrictor (32) in the supply line (22, 29) and is operative to maintain the pressure in the supply line substantially equal to the pressure surrounding the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.