US4956072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen sensor
Assignee: Niterra Co Ltd
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Filing: 1989-05-25
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Granted: 1990-09-11
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Expires: 2009-05-25
Abstract
Abstract An oxygen sensor including a detection element with electrodes for detecting an oxygen partial pressure, a metal member for containing the detection element, and an insulation spacer for supporting the detection element. The oxygen sensor further includes an insulating layer for covering the surface of a recess defined by the detection element, the metal member, and the insulating spacer, thus preventing the deterioration of insulation between the electrodes of the detection element and the metal member. The oxygen sensor of this invention can accurately detect the oxygen partial pressure for a long time.
Inventors
- 👤 Takao Kojima
- 👤 Yasuhiro Ujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:56
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4077
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A solid electrolyte oxygen sensor comprising: a detection element comprising a solid electrolyte and inner and outer electrodes coupled to said solid electrolyte, at least one of which is exposed to the atmosphere, for detecting an oxygen partial pressure for the surrounding atmosphere; a metal member insulated from the outer electrode of the detection element for containing the detection element; an insulating spacer provided between the outer electrode of the detection element and the metal member for supporting the detecting element; and heat-stable insulating layer means covering the surface of a recess defined between the detection element on one side and the metal member and the insulating spacer on the other side for preventing deterioration of insulation between said electrodes and said metal member.
Claim 2
Dependent Claim
124 words
A solid electrolyte oxygen sensor comprising: a detection element comprising a solid electrolyte and inner and outer electrodes coupled to said solid electrolyte, at least one of which is exposed to the atmosphere, for detecting an oxygen partial pressure for the surrounding atmosphere; a metal member insulated from the outer electrode of the detection element for containing the detection element; an insulating spacer provided between the outer electrode of the detection element and the metal member for supporting the detecting element; and heat-stable insulating layer means covering the surface of a recess defined between the detection element on one side and the metal member and the insulating spacer on the other side for preventing deterioration of insulation between said electrodes and said metal member.
Claim 3
Dependent Claim
18 words
An oxygen sensor according to claim 1, in which the solid electrolyte is an oxygen ion-conducting solid electrolyte.
Claim 4
Dependent Claim
18 words
An oxygen sensor according to claim 2, in which the detection element has the shape of a test-tube.
Claim 5
Dependent Claim
14 words
An oxygen sensor according to claim 2, in which the detection element is cylindrical.
Claim 6
Dependent Claim
20 words
An oxygen sensor according to claim 1, in which the insulating layer mainly consists of Al 2 O 3 .
Claim 7
Dependent Claim
18 words
An oxygen sensor according to claim 1, in which the insulating layer mainly consists of SiO 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |