US3836744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heating apparatus having a cover plate for minimizing thermal expansion effects
Assignee: Mitsubishi Electric Corp
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Filing: 1973-05-04
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Granted: 1974-09-17
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Expires: 1993-05-04
Abstract
Abstract An induction heating apparatus for induction-heating a heated apparatus by an exciter excited by the standard line frequency for generating an alternating magnetic field. The apparatus comprises a high resistant non-magnetic metal plate, preferably of stainless steel, placed at the surface between the heated apparatus and the exciter. Various configurations of grooves can be provided in the plate to minimize the effects of thermal expansion.
Inventors
- 👤 K Taketo
- 👤 T Ito
- 👤 F Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:46
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/30; B60; B60R; B60R13/00; B32B15/00; B32B15/18; B32B15/20; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/12; H05B6/1209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
An induction heating apparatus, which comprises: an exciter for generating an alternating magnetic field for induction heating apparatus by electromagnetic induction of said alternating magnetic field; a high resistant non-magnetic substantially flat metal plate placed between said exciter and said heated apparatus; thermal insulating means placed between said exciter and said non-magnetic metal plate for insulating thermal transmission therebetween; and at least one concave grooved means of substantially circular configuration formed in said non-magnetic metal plate for substantially defining therewithin the zone of said nonmagnetic metal plate which is in contact with said heated apparatus and for separating said zone from the portion of said non-magnetic metal plate which is not in contact with said heated apparatus, the temperature gradient existing between said zone and said portion of said plate creating a thermal strain within said plate which may consequently be absorbed by said grooved means.
Claim 2
Dependent Claim
146 words
An induction heating apparatus, which comprises: an exciter for generating an alternating magnetic field for induction heating apparatus by electromagnetic induction of said alternating magnetic field; a high resistant non-magnetic substantially flat metal plate placed between said exciter and said heated apparatus; thermal insulating means placed between said exciter and said non-magnetic metal plate for insulating thermal transmission therebetween; and at least one concave grooved means of substantially circular configuration formed in said non-magnetic metal plate for substantially defining therewithin the zone of said nonmagnetic metal plate which is in contact with said heated apparatus and for separating said zone from the portion of said non-magnetic metal plate which is not in contact with said heated apparatus, the temperature gradient existing between said zone and said portion of said plate creating a thermal strain within said plate which may consequently be absorbed by said grooved means.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |