Patent · US Expired

Seal for a sensor element of a gas sensor and method for producing said seal

US6474655B1 · kind B1 · utility

10Cited by

5References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Helmut Weyl
Bernhard Wild · Markgröningen, DE
Peter Dettling · Waiblingen, DE

Key dates

Filing date	Sep 6, 2000
Grant date	Nov 5, 2002
Priority date	—
Expiry date	Sep 6, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S277/937
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A seal is proposed for a sensor element of a gas sensor, in particular for determining the oxygen content in exhaust gases of combustion engines. The seal has a sealing element, which is fixed in position in a longitudinal bore of a metallic housing. The sealing element contains a mixture of steatite and at least one low-melting-point glass. To manufacture the seal, a prefabricated sealing ring made of a mixture of steatite powder and powdered glass is used, which is pressed in the longitudinal bore, the sealing ring being subjected to a thermal treatment, in which the glass is melted.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.