US4035613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical ceramic heating device
Assignee: Kyoto Ceramic Co Ltd
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Filing: 1976-01-08
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Granted: 1977-07-12
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Expires: 1996-01-08
Abstract
Abstract The disclosure relates to a ceramic heating device in the form of a cylindrical shape comprising a burnt cylindrical support core of heat-resistant ceramics, a ceramic element disposed around said support core, said element comprising (i) a burnt sheet of heat-resistant ceramics; (ii) a heat-generating resistor pattern, said pattern being hermetically sealed between said sheet; and (iii) a pair of exposed terminals provided onto said sheet and said core, said terminal being connected to said pattern and adapted to be coupled to power leads such that electric power is then applied to said pattern.
Inventors
- 👤 Nobukazu Sagawa
- 👤 Yasuo Uchikado
- 👤 Yoshiteru Hamano
- 👤 Ryoichi Sugimoto
- 👤 Sakae Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:10
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/26; H05B3/265; H05B3/10; H05B3/18; H05B3/40; H05B3/42; H05B3/48; H05B2203/00; H05B2203/002; H05B2203/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A cylindrical ceramic heating device comprising: a burnt cylindrical support core of heat resistant ceramics; at least one burnt heater element made of heat resistant ceramics disposed around said support core in contact with the periphery of said support core, said element comprising a burnt sheet of heat resistant ceramics; a heat-generating electrical resistor pattern formed from a resistive paste and fired on said ceramic sheet, said pattern being hermetically sealed between said sheet and said core; and a pair of exposed terminals disposed on said sheet, said terminals being connected to said pattern and adapted to be coupled to power leads such that electrical power is applied to said pattern; said support core being a hollow cylinder and the hollow thereof being adapted to form a means to connect with a cylindrical article to to heated.
Claim 2
Dependent Claim
137 words
A cylindrical ceramic heating device comprising: a burnt cylindrical support core of heat resistant ceramics; at least one burnt heater element made of heat resistant ceramics disposed around said support core in contact with the periphery of said support core, said element comprising a burnt sheet of heat resistant ceramics; a heat-generating electrical resistor pattern formed from a resistive paste and fired on said ceramic sheet, said pattern being hermetically sealed between said sheet and said core; and a pair of exposed terminals disposed on said sheet, said terminals being connected to said pattern and adapted to be coupled to power leads such that electrical power is applied to said pattern; said support core being a hollow cylinder and the hollow thereof being adapted to form a means to connect with a cylindrical article to to heated.
Claim 3
Dependent Claim
60 words
The ceramic heating device as claimed in claim 1 wherein said burnt sheet is a wrapped sheet around the outer surface of said support core and is sintered with said support core into one body, and said heat-generating resistor pattern is provided on the back side of said wrapped sheet in contact with the outer surface of said support core.
Claim 4
Dependent Claim
37 words
The ceramic heating device as claimed in claim 2 wherein said support core and said wrapped sheet are both made of a heat-resistive ceramic material as a starting material and both are sintered into one discrete body.
Claim 5
Dependent Claim
64 words
The ceramic heating device as claimed in claim 2 wherein said pair of exposed terminals are provided on the front surface of said wrapped sheet and are connected to each other by said heat-generating resistor pattern on the back surface of said wrapped sheet; and a through-hole connecting means passing through the thickness of said wrapped sheet is provided with said terminals passing therethrough.
Claim 6
Dependent Claim
43 words
The ceramic heating device as claimed in claim 1 wherein said support core and said heater element are made of the same ceramics selected from the group consisting of alumina ceramics, beryllium oxide ceramics, cordierite ceramics, zircon ceramics, mullite ceramics and celsian ceramics.
Claim 7
Dependent Claim
47 words
The ceramic heating device as claimed in claim 1 wherein said support core and said heater element are made of different ceramics which are selected from the combination group of alumina ceramics-beryllium oxide ceramics, cordierite ceramics-zircon ceramics, cordierite ceramics-mullite ceramics, cordierite ceramics-celsian ceramics and zircon ceramics-mullite ceramics.
Claim 8
Dependent Claim
28 words
The ceramic heating device as claimed in claim 1 wherein said heat-generating resistor pattern comprises a material selected from the group consisting of W, Mo, Mo--Mn and Pt.
Claim 9
Dependent Claim
23 words
The ceramic heating device as claimed in claim 1 wherein said terminals are made of the same material as said heat-generating resistor pattern.
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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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |