Moisture sensor for purging system
US4445012A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1980 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Nov 3, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A moisture sensor detects the presence of foreign matter in a fluid conducting conduit and produces an electrical signal which activates a pump to purge the conduit of the foreign matter. The moisture sensor includes a pair of conduits that may be formed of an electrically conductive material and a coupling for placing the pair of conduits in fluid communication. A pair of electrodes are mounted in the coupling and are insulated from one another until electrically conductive foreign matter bridges a gap between the electrodes. Bridging the gap between the electrodes causes a signal to be sent to a source of gas that injects gas in the conduits to remove the foreign material therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.