Patent US4126532A successfully refreshed from Google Patents.
US4126532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen sensor
Assignee: Nissan Motor Co Ltd
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Filing: 1977-09-21
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Granted: 1978-11-21
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Expires: 1997-09-21
Abstract
Abstract A first layer of a metal/metal oxide sinter which acts as a reference source of oxygen is affixed on a flat surface of a base member, a second layer of solid electrolyte is affixed on the first layer and a third layer of metal is affixed on the second layer so that upon exposure of the third layer to exhaust gases or the like, an EMF (electromotive force) is developed between the first and third layers.
Inventors
- 👤 Hiroshi Takao
- 👤 Kazuo Matoba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4071
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
216 words
An oxygen sensor for determining the oxygen content in a fluid, comprising: a non-conductive base member having thereon a substantially flat surface and having spaced first and second holes passing therethrough which extend from said flat surface; a first layer of solid material providing a reference source of oxygen and having first and second surfaces, said first surface of said first layer being directly affixed to said flat surface of said base member and covering said first hole, with a portion of said first layer being received in said first hole; a second layer of a solid electrolyte covering said first layer and having first and second surfaces, said first surface of said second layer being directly affixed to said second surface of said first layer; a third layer of a metal covering said second layer and having first and second surfaces, said first surface of said third layer being directly affixed to said second surface of said layer, said second surface of said third layer being exposed to said fluid, and a portion of said third layer being received in said second hole in said base member; and two lead wires respectively received in said first and second holes and connected with the portions of said first and third layers, respectively received in said holes.
Claim 2
Dependent Claim
216 words
An oxygen sensor for determining the oxygen content in a fluid, comprising: a non-conductive base member having thereon a substantially flat surface and having spaced first and second holes passing therethrough which extend from said flat surface; a first layer of solid material providing a reference source of oxygen and having first and second surfaces, said first surface of said first layer being directly affixed to said flat surface of said base member and covering said first hole, with a portion of said first layer being received in said first hole; a second layer of a solid electrolyte covering said first layer and having first and second surfaces, said first surface of said second layer being directly affixed to said second surface of said first layer; a third layer of a metal covering said second layer and having first and second surfaces, said first surface of said third layer being directly affixed to said second surface of said layer, said second surface of said third layer being exposed to said fluid, and a portion of said third layer being received in said second hole in said base member; and two lead wires respectively received in said first and second holes and connected with the portions of said first and third layers, respectively received in said holes.
Claim 3
Dependent Claim
26 words
An oxygen sensor as claimed in claim 1, wherein said first layer comprises a compacted powder mixture including a metal and an oxide of said metal.
Claim 4
Dependent Claim
19 words
An oxygen sensor as claimed in claim 2, wherein said first layer comprises a mixture of Ni and NiO.
Claim 5
Dependent Claim
73 words
An oxygen sensor as claimed in claim 1, wherein said first layer comprises: a first sub-layer of a compacted powder mixture comprising a metal and an oxide of said metal; and a second sub-layer of a metal interposed between said first sub-layer of said compacted powder mixture and said flat surface of said base member, said second sublayer of said metal constituting said portion of said first layer received in said first hole.
Claim 6
Dependent Claim
32 words
An oxygen sensor as claimed in claim 1, further comprising a porous protecting layer which covers the second surface of said third layer, said porous protecting layer being comprised of a ceramic.
Claim 7
Dependent Claim
34 words
An oxygen sensor as claimed in claim 1, wherein said base member is made from a material selected from the group consisting of a ceramic and a mixture of a ceramic and a metal.
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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |