Patent US4883947A successfully refreshed from Google Patents.
US4883947A
Expired / Lapsed
US
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Resistance ceramic heater with mutually connected heat-generating conductors, and electrochemical element or oxygen analyzer using such ceramic heater
Assignee: NGK Insulators Ltd
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Filing: 1989-03-06
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Granted: 1989-11-28
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Expires: 2009-03-06
Abstract
Abstract A resistance ceramic heater including a ceramic substrate, and a heating element which has a resistance heat-generating portion, and electrical leads connected to the heat-generating portion for energizing the heat-generating portion to generate heat. The heat-generating portion consists of a plurality of electrically resisitive heat-generating conductors formed in parallel connection with each other and in series connection to the electrical leads, and a plurality of connecting conductors which connects the heat-generating conductors, at a plurality of connection points on each of the heat-generating conductors. The connecting points are spaced apart from each other along the length of each heat-generating conductor. An electrochemical element and an oxygen analyzer or sensor which uses the ceramic heater are also disclosed.
Inventors
- 👤 Takao Murase
- 👤 Tsunenori Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:01
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/283; G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/4067; H05B2203/00; H05B2203/002; H05B2203/003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A resistance ceramic heater comprising: a ceramic substrate; and a heating element including a resistance heat-generating portion, and electrical leads connected to said heat-generating portion for energizing the heat-generating portion to generate heat, said heat-generating portion consisting of a plurality of electrically resistive heat-generating conductors formed in parallel connection with each other and in series connection to said electrical leads, and a plurality of connecting conductors which connects said plurality of heat-generating conductors, at a plurality of connection points on each of said plurality of heat-generating conductors, said connecting points being spaced apart from each other along a length of said each heat-generating conductor.
Claim 2
Dependent Claim
104 words
A resistance ceramic heater comprising: a ceramic substrate; and a heating element including a resistance heat-generating portion, and electrical leads connected to said heat-generating portion for energizing the heat-generating portion to generate heat, said heat-generating portion consisting of a plurality of electrically resistive heat-generating conductors formed in parallel connection with each other and in series connection to said electrical leads, and a plurality of connecting conductors which connects said plurality of heat-generating conductors, at a plurality of connection points on each of said plurality of heat-generating conductors, said connecting points being spaced apart from each other along a length of said each heat-generating conductor.
Claim 3
Dependent Claim
38 words
A resistance ceramic heater according to claim 1, wherein said ceramic substrate includes an electrically insulating layer which contacts said heat-generating portion of said heating element, said electrically insulating layer being formed of an electrically insulating ceramic material.
Claim 4
Dependent Claim
47 words
A resistance ceramic heater according to claim 2, further comprising another electrically insulating layer which is formed of an electrically insulating ceramic material and which cooperates with said electrically insulating layer of said ceramic substrate to provide a ceramic structure in which said heat-generating portion is embedded.
Claim 5
Dependent Claim
24 words
A resistance ceramic heater according to claim 1, wherein at least said heat-generating portion of said heating element is co-fired with said ceramic substrate.
Claim 6
Dependent Claim
42 words
A resistance ceramic heater according to claim 1, wherein said heat-generating portion of said heating element is formed of a cermet which consists of a ceramic material, and an electrically conductive metallic material which contains a noble metal as a major component.
Claim 7
Dependent Claim
28 words
A resistance ceramic heater according to claim 5, wherein said noble metal as the major component of said electrically conductive metallic material of said cermet consists of platinum.
Claim 8
Dependent Claim
27 words
A resistance ceramic heater according to claim 5, wherein said ceramic material of said cermet is substantially the same as a ceramic material of said ceramic substrate.
Claim 9
Dependent Claim
34 words
A resistance ceramic heater according to claim 1, wherein said connecting conductors of said heat-generating portion have a volume resistivity value which is not higher than a half of that of said heat-generating conductors.
Claim 10
Dependent Claim
28 words
A resistance ceramic heater according to claim 1, wherein said plurality of heat-generating conductors of said heat-generating portion of said heating element consist of two parallel heat-generating conductors.
Claim 11
Dependent Claim
36 words
A resistance ceramic heater according to claim 1, wherein said plurality of heat-generating conductors and said plurality of connecting conductors of said heat-generating portion of said heating element cooperate with each other to form a grid.
Claim 12
Dependent Claim
133 words
An electrochemical element comprising: at least one electrochemical cell including a solid electrolyte body, and at least one pair of electrodes formed on said solid electrolyte body; and a resistance ceramic heater which includes a ceramic substrate, and a heating element having a resistance heat-generating portion, and electrical leads connected to said heat-generating portion for energizing the heat-generating portion to generate heat, said heat-generating portion consisting of a plurality of electrically resistive heat-generating conductors formed in parallel connection with each other and in series connection to said electrical leads, and a plurality of connecting conductors which connects said plurality of heat-generating conductors, at a plurality of connection points on each of said plurality of heat-generating conductors, said connecting points being spaced apart from each other along a length of said each heat-generating conductor.
Claim 13
Dependent Claim
133 words
An electrochemical element comprising: at least one electrochemical cell including a solid electrolyte body, and at least one pair of electrodes formed on said solid electrolyte body; and a resistance ceramic heater which includes a ceramic substrate, and a heating element having a resistance heat-generating portion, and electrical leads connected to said heat-generating portion for energizing the heat-generating portion to generate heat, said heat-generating portion consisting of a plurality of electrically resistive heat-generating conductors formed in parallel connection with each other and in series connection to said electrical leads, and a plurality of connecting conductors which connects said plurality of heat-generating conductors, at a plurality of connection points on each of said plurality of heat-generating conductors, said connecting points being spaced apart from each other along a length of said each heat-generating conductor.
Claim 14
Dependent Claim
136 words
An oxygen analyzing device comprising: at least one electrochemical cell including an oxygen-ion conductive solid electrolyte body, and at least one pair of electrodes formed on said solid electrolyte body; and a resistance ceramic heater which includes a ceramic substrate, and a heating element having a resistance heat-generating portion, and electrical leads connected to said heat-generating portion for energizing the heat-generating portion to generate heat, said heat-generating portion consisting of a plurality of electrically resistive heat-generating conductors formed in parallel connection with each other and in series connection to said electrical leads, and a plurality of connecting conductors which connects said plurality of heat-generating conductors, at a plurality of connection points on each of said plurality of heat-generating conductors, said connecting points being spaced apart from each other along a length of said each heat-generating conductor.
Claim 15
Dependent Claim
136 words
An oxygen analyzing device comprising: at least one electrochemical cell including an oxygen-ion conductive solid electrolyte body, and at least one pair of electrodes formed on said solid electrolyte body; and a resistance ceramic heater which includes a ceramic substrate, and a heating element having a resistance heat-generating portion, and electrical leads connected to said heat-generating portion for energizing the heat-generating portion to generate heat, said heat-generating portion consisting of a plurality of electrically resistive heat-generating conductors formed in parallel connection with each other and in series connection to said electrical leads, and a plurality of connecting conductors which connects said plurality of heat-generating conductors, at a plurality of connection points on each of said plurality of heat-generating conductors, said connecting points being spaced apart from each other along a length of said each heat-generating conductor.
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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |