US6319376B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring probe
Assignee: Robert Bosch GmbH
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Filing: 1998-09-04
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Granted: 2001-11-20
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Expires: 2018-09-04
Abstract
Abstract A sensor, particularly for determining the oxygen content in exhaust gasses of internal combustion engines, includes sensor element which is fixed in a metallic housing and a sealing flange which is integrally formed on the housing and rests on a sealing seat which is formed on an exhaust system. The sealing flange has two ring elements which are integrally formed on the housing and each have an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing.
Inventors
- 👤 Theodor Graser
- 👤 Gerhard Hoetzel
- 👤 Johann Wehrmann
- 👤 Heinz Eisenschmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:55
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; F; F01; F01N; F01N13/00; F01N13/008; G01N27/4078; F01N2450/00; F01N2450/24; F01N2560/00; F01N2560/02; F01N2560/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A sensor for determining an oxygen content in an exhaust gas of an internal combustion engine, comprising: a housing; a sensor element fixed in the housing; and a sealing flange formed out of a material of the housing, the sealing flange including two ring elements formed out of the housing, each of the two ring elements having an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing, the two ring elements acting as resilient legs.
Claim 2
Dependent Claim
82 words
A sensor for determining an oxygen content in an exhaust gas of an internal combustion engine, comprising: a housing; a sensor element fixed in the housing; and a sealing flange formed out of a material of the housing, the sealing flange including two ring elements formed out of the housing, each of the two ring elements having an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing, the two ring elements acting as resilient legs.
Claim 3
Dependent Claim
39 words
The sensor according to claim 1 , wherein the sealing surfaces are slanted at an angle of 10° to 30° relative to a plane running at right angles to a center line of the housing, the housing being tubular-shaped.
Claim 4
Dependent Claim
53 words
The sensor according to claim 2 , wherein the angle is about 20°. 4 .The sensor according to claim 1 , further comprising a sealing arrangement for the sensor element mounted in the housing, the sealing flange being situated behind the sealing arrangement, as viewed from a measuring gas side of the sensor.
Claim 5
Dependent Claim
46 words
The sensor according to claim 4 , wherein the housing further comprises two annular surfaces, a first of the two annular surfaces being further from a measuring gas than a second of the two annular surfaces, the sealing arrangement being pressed between the two annular surfaces.
Claim 6
Dependent Claim
36 words
The sensor according to claim 1 , further comprising a connecting piece encircling an opening in an exhaust pipe in a gas-tight manner, a sealing seat for the sealing flange being formed on the connecting piece.
Claim 7
Dependent Claim
20 words
The sensor according to claim 1 , further comprising a fastening element for mounting the housing in an exhaust pipe.
Claim 8
Dependent Claim
135 words
Exhaust pipe for an internal combustion engine with a sensor for determining an oxygen content in an exhaust gas of the internal combustion engine in the exhaust pipe, comprising: a pipe with an opening; a cylindrical connecting piece, the cylindrical connecting piece having a plane annular section, the cylindrical connecting piece being welded into the opening; a housing; a sensor element fixed in the housing; and a sealing flange formed out of a material of the housing, the sealing flange including two ring elements formed out of the housing, each of the two ring elements having an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing, the two ring elements acting as resilient legs; the sealing flange resting on the plane annular section of the cylindrical connecting piece.
Claim 9
Dependent Claim
135 words
Exhaust pipe for an internal combustion engine with a sensor for determining an oxygen content in an exhaust gas of the internal combustion engine in the exhaust pipe, comprising: a pipe with an opening; a cylindrical connecting piece, the cylindrical connecting piece having a plane annular section, the cylindrical connecting piece being welded into the opening; a housing; a sensor element fixed in the housing; and a sealing flange formed out of a material of the housing, the sealing flange including two ring elements formed out of the housing, each of the two ring elements having an inclined sealing surface, a hollow space being formed between the two ring elements inside the housing, the two ring elements acting as resilient legs; the sealing flange resting on the plane annular section of the cylindrical connecting piece.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-11-19 | 2005-05-21 | 2005-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-19 | 2009-05-21 | 2009-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-19 | 2013-05-21 | 2013-11-20 | $7700.00 | Window Closed / Lapsed |