US4564001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vessel for use with high-frequency induction heater
Assignee: NIPPON ALUMI TSURUMARU CORP Co Ltd 9-39 3-CHOME MIKUNIHON-MACHI YODOGAWA-KU OSAKA-SHI OSAKA-FU
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Filing: 1984-06-18
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Granted: 1986-01-14
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Expires: 2004-06-18
Abstract
Abstract A vessel for use with a high-frequency induction heater, having a bottom wall adapted to be heated by the induction heater for heating fluid contents of the vessel. At least the bottom wall is made from a cladding composite which consists of an aluminum alloy layer and a stainless steel layer clad with each other under pressure. The aluminum alloy layer is disposed on the inner side of the vessel, and consists of not more than 0.30 wt % of Si, not more than 0.7 wt % of iron, not more than 0.25 wt % of copper, 1.0-1.5 wt % of manganese, 0.8-1.3 wt % of magnesium, not more than 0.25 wt % of zinc, and the balance being aluminum.
Inventors
- 👤 Tsuneo Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:36
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/002; A47J36/00; A47J36/02; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/12; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
135 words
A vessel having a bottom wall adapted to be heated through high-frequency induction heating for heating fluid contents contained in the vessel, the improvement comprising: at least said bottom wall being made from a cladding which consists of an aluminum alloy layer having a thickness of 0.5-3.0 mm and a stainless steel layer having a thickness of 0.1-0.5 mm clad with each other under pressure, said aluminum alloy layer being disposed on the inner side of the vessel; said aluminum alloy layer consisting of not more than 0.30 wt% Si, not more than 0.7 wt% of iron, not more than 0.25 wt% of copper, 1.0-1.5 wt% of iron, not more than 0.25 wt% of copper, 1.0-1.5 wt% of manganese, 0.8-1.3 wt% of magnesium, not more than 0.25 wt% of zinc, and the balance being aluminum.
Claim 2
Dependent Claim
135 words
A vessel having a bottom wall adapted to be heated through high-frequency induction heating for heating fluid contents contained in the vessel, the improvement comprising: at least said bottom wall being made from a cladding which consists of an aluminum alloy layer having a thickness of 0.5-3.0 mm and a stainless steel layer having a thickness of 0.1-0.5 mm clad with each other under pressure, said aluminum alloy layer being disposed on the inner side of the vessel; said aluminum alloy layer consisting of not more than 0.30 wt% Si, not more than 0.7 wt% of iron, not more than 0.25 wt% of copper, 1.0-1.5 wt% of iron, not more than 0.25 wt% of copper, 1.0-1.5 wt% of manganese, 0.8-1.3 wt% of magnesium, not more than 0.25 wt% of zinc, and the balance being aluminum.
Claim 3
Dependent Claim
21 words
A vessel as set forth in claim 1, wherein the stainless steel of said stainless steel layer is of ferrite structure.
Claim 4
Dependent Claim
52 words
A vessel as set forth in claim 2, wherein said stainless steel layer consists of 0.015-0.025 wt% of carbon, 0.49-1.0 wt% of silicon, 0.54-1.0 wt% of manganese, 0.026-0.040 wt% of phosphorus, 0.003-0.005 wt% of sulfur, 16.0-19.0 wt% of chromium, 0.30-0.80 wt% of copper, 0.30-0.80 wt% of niobium, and the balance being iron.
Claim 5
Dependent Claim
41 words
A vessel as set forth in claim 1, further having a cylindrical side wall extending from a peripheral edge of said bottom wall and cooperating with the bottom wall to define a container in the form of a pot or pan.
Claim 6
Dependent Claim
32 words
A vessel as set forth in claim 4, wherein said aluminum alloy layer defining an inner surface of said cladding is coated with an alumite layer having a thickness of 6-10 microns.
Claim 7
Dependent Claim
32 words
A vessel as set forth in claim 4, wherein said aluminum alloy layer defining an inner surface of said cladding is coated with a fluororesin layer having a thickness of 20-30 microns.
Claim 8
Dependent Claim
24 words
A vessel as set forth in claim 4, wherein said container is a pot adapted to be place on a high-frequency induction cooking heater.
Claim 9
Dependent Claim
37 words
A vessel as set forth in claim 4, wherein said fluid contents to be heated in said container consists of a viscous fluid such as materials for curry sauce and stew, which is easy to undergo convection.
Claim 10
Dependent Claim
77 words
A vessel as set forth in claim 4, wherein said bottom wall comprises a peripheral portion adjacent to said peripheral edge and a central portion raised away from said peripheral portion inwardly of said container, a height of said raised portion from the plane of said peripheral portion being selected such that said central portion will not protrude away from said peripheral portion outwardly of said container due to strain generated in the container during its service.
Claim 11
Dependent Claim
31 words
A vessel as set forth in claim 9, wherein said height of said bottom wall at its center from said plane of the peripheral portion is not greater than 6 mm.
Claim 12
Dependent Claim
43 words
A vessel as set forth in claim 9, wherein said peripheral portion of the bottom wall has a flat annular bottom bearing surface, a diameter of said central portion being 1/5 to 1/3 of an outside diameter of said annular bottom bearing surface.
Claim 13
Dependent Claim
19 words
A vessel as set forth in claim 4, wherein the whole of said container is made from said cladding.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |