Seal for a sensor element of a gas sensor
US5846391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Apr 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4078
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A seal for a sensor element for a gas sensor for determining the oxygen content in a gas to be measured including exhaust gases of internal combustion engines, the seal including a metallic housing having defined therein a longitudinal bore; a sensor element inserted into the longitudinal bore; and a sealing arrangement provided in the longitudinal bore, surrounding at least a portion of the sensor element, and comprised of at least one seal element comprised of steatite and an additional seal element comprised of boron nitride arranged in contact with one another and in a stack having a side near the gas to be measured so that, when there is one seal element comprised of steatite, the one seal element comprised of steatite is positioned on the side of the stack near the gas to be measured, and so that, when there are two seal elements comprised of steatite, the additional seal element is positioned between the two seal elements comprised of steatite, wherein the at least one seal element comprised of steatite and the additional seal element comprised of boron nitride are inserted into the longitudinal bore of the housing as deformable rings and are pressed-in therein, and wherein,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.