Device for withdrawing and/or ejecting a contaminating medium, with decontamination of the member for manipulating said medium
US5765490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Feb 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1086
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Process for heating a hollow needle (2) consisting essentially of a metal tube (3), the inside and/or outside of which have previously been brought into contact with a contaminating medium, according to which an electric current is supplied to the said needle, flowing in the metal wall and over the length of the said tube (3) and dissipating thermal energy therein through the ohmic effect, characterized in that a predetermined quantity of electrical energy is supplied to the said needle (2), metered as a function of the electrical characteristics of the said tube (3), on the one hand to suffice for decontamination of the needle, both inside and outside, and on the other hand to limit the heating and preserve the integrity, including the original shape, of the said needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.