Patent US4655901A successfully refreshed from Google Patents.
US4655901A
Expired / Lapsed
US
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Oxygen sensor element
Assignee: NGK Insulators Ltd
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Filing: 1984-07-30
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Granted: 1987-04-07
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Expires: 2004-07-30
Abstract
Abstract A measuring electrode is mounted on one side surface of a solid electrolyte, while a reference electrode is mounted on a separate solid electrolyte and disposed so as to face the opposite side surface of said one solid electrolyte across a gap.
Inventors
- 👤 Syunzo Mase
- 👤 Shigeo Soejima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:21
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4071; G01N27/4067
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
209 words
An oxygen sensor element, comprising a first planar solid electrolyte having a first side surface and a second side surface, wherein a measuring electrode is mounted on said first side surface thereof, a second planar solid electrolyte having a first side surface and a second side surface, wherein the first side surface of the second planar solid electrolyte is in electrochemical contact with the second side surface of said first planar solid electrolyte, said second side surface of said first electrolyte being opposite from said first side surface of said first electrolyte, a gap portion located between said second side surface of said first planar solid electrolyte and said first side surface of said second planar solid electrolyte, said gap portion for carrying a reference substance, and a reference electrode mounted on said first side surface of said second planar solid electrolyte at a position facing said first planar solid electrolyte across said gap portion, said measuring electrode and said reference electrode forming an oxygen concentration cell for detecting the concentration of oxygen which communicates with said measuring electrode, such that said second side surface of said first planar solid electrolyte and said second side surface of said second planar solid electrolyte do not have any electrodes disposed thereon.
Claim 2
Dependent Claim
209 words
An oxygen sensor element, comprising a first planar solid electrolyte having a first side surface and a second side surface, wherein a measuring electrode is mounted on said first side surface thereof, a second planar solid electrolyte having a first side surface and a second side surface, wherein the first side surface of the second planar solid electrolyte is in electrochemical contact with the second side surface of said first planar solid electrolyte, said second side surface of said first electrolyte being opposite from said first side surface of said first electrolyte, a gap portion located between said second side surface of said first planar solid electrolyte and said first side surface of said second planar solid electrolyte, said gap portion for carrying a reference substance, and a reference electrode mounted on said first side surface of said second planar solid electrolyte at a position facing said first planar solid electrolyte across said gap portion, said measuring electrode and said reference electrode forming an oxygen concentration cell for detecting the concentration of oxygen which communicates with said measuring electrode, such that said second side surface of said first planar solid electrolyte and said second side surface of said second planar solid electrolyte do not have any electrodes disposed thereon.
Claim 3
Dependent Claim
235 words
An oxygen sensor element, comprising a first planar solid electrolyte having a first side surface and a second side surface, wherein a measuring electrode is mounted on said first side surface thereof, a second planar solid electrolyte having a first side surface and a second side surface, wherein the first side surface of the second planar solid electrolyte is in electrochemical contact with the second side surface of said first planar solid electrolyte, said second side surface of said first electrolyte being opposite from said first side surface of said first planar solid electrolyte, a gap portion located between said second side surface of said first planar solid electrolyte and said first side surface of said second planar solid electrolyte, said gap portion for carrying a reference substance, a reference electrode mounted on said first side surface of said second planar solid electrolyte at a position facing said first planar solid electrolyte across said gap portion and a ceramic heater disposed in thermal contact with a surface of said second planar solid electrolyte at a position separated from said reference electrode, said measuring electrode and said reference electrode forming an oxygen concentration cell for detecting the concentration of oxygen which communicates with said measuring electrode, such that said second side surface of said first planar solid electrolyte and said second side surface of said second planar solid electrolyte do not have any electrodes disposed thereon.
Claim 4
Dependent Claim
235 words
An oxygen sensor element, comprising a first planar solid electrolyte having a first side surface and a second side surface, wherein a measuring electrode is mounted on said first side surface thereof, a second planar solid electrolyte having a first side surface and a second side surface, wherein the first side surface of the second planar solid electrolyte is in electrochemical contact with the second side surface of said first planar solid electrolyte, said second side surface of said first electrolyte being opposite from said first side surface of said first planar solid electrolyte, a gap portion located between said second side surface of said first planar solid electrolyte and said first side surface of said second planar solid electrolyte, said gap portion for carrying a reference substance, a reference electrode mounted on said first side surface of said second planar solid electrolyte at a position facing said first planar solid electrolyte across said gap portion and a ceramic heater disposed in thermal contact with a surface of said second planar solid electrolyte at a position separated from said reference electrode, said measuring electrode and said reference electrode forming an oxygen concentration cell for detecting the concentration of oxygen which communicates with said measuring electrode, such that said second side surface of said first planar solid electrolyte and said second side surface of said second planar solid electrolyte do not have any electrodes disposed thereon.
Claim 5
Dependent Claim
30 words
An oxygen sensor element as set forth in claim 2, wherein said ceramic heater is disposed in thermal contact with said second side surface of said second planar solid electrolyte.
Claim 6
Dependent Claim
24 words
An oxygen sensor element as set forth in claim 1, 2, or 3 and further comprising a porous ceramic filled in said gap portion.
Claim 7
Dependent Claim
25 words
An oxygen sensor element as set forth in claim 1, 2, or 3 and further comprising a porous solid electrolyte filled in said gap portion.
Claim 8
Dependent Claim
197 words
An oxygen sensor element comprising: a first planar solid electrolyte having a first side surface and a second side surface, wherein a measuring electrode is mounted on said first side surface thereof; a gastight solid electrolyte having a gap portion defined therein, a first side surface of said gastight solid electrolyte being in electrochemical contact with said second side surface of said first planar solid electrolyte; a second planar solid electrolyte having a first side surface and a second side surface, wherein a reference electrode is mounted on said first side surface thereof, said first side surface of the second planar solid electrolyte being in electrochemical contact with the second side surface of said gastight solid electrolyte, thereby forming a gap portion between said second side surface of said first planar solid electrolyte and said first side surface of said second planar solid electrolyte, said measuring and said reference electrode forming an oxygen concentration cell for detecting the concentration of oxygen which communicates with said measuring electrode, such that said second side surface of said first planar solid electrolyte and said second side surface of said second planar solid electrolyte do not have any electrodes disposed thereon.
Claim 9
Dependent Claim
197 words
An oxygen sensor element comprising: a first planar solid electrolyte having a first side surface and a second side surface, wherein a measuring electrode is mounted on said first side surface thereof; a gastight solid electrolyte having a gap portion defined therein, a first side surface of said gastight solid electrolyte being in electrochemical contact with said second side surface of said first planar solid electrolyte; a second planar solid electrolyte having a first side surface and a second side surface, wherein a reference electrode is mounted on said first side surface thereof, said first side surface of the second planar solid electrolyte being in electrochemical contact with the second side surface of said gastight solid electrolyte, thereby forming a gap portion between said second side surface of said first planar solid electrolyte and said first side surface of said second planar solid electrolyte, said measuring and said reference electrode forming an oxygen concentration cell for detecting the concentration of oxygen which communicates with said measuring electrode, such that said second side surface of said first planar solid electrolyte and said second side surface of said second planar solid electrolyte do not have any electrodes disposed thereon.
Claim 10
Dependent Claim
29 words
An oxygen sensor as set forth in claim 6, wherein a ceramic heater is disposed in thermal contact with the second side surface of said second planar solid electrolyte.
Claim 11
Dependent Claim
20 words
An oxygen sensor element as set forth in claim 6, wherein a porous ceramic is filled in said gap portion.
Claim 12
Dependent Claim
21 words
An oxygen sensor element as set forth in claim 6, wherein a porous solid electrolyte is filled in said gap portion.
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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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |