US3692968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic oven
Assignee: Sanyo Electric Co Ltd
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Filing: 1971-02-22
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Granted: 1972-09-19
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Expires: 1991-02-22
Abstract
Abstract An electronic oven comprising an oven-defining structure equipped with means for effecting the browning action on an object to be heated, said browning means including means for creating a forced circulation of air and a heating assembly, whereby hot air of relatively high temperature can advantageously be directed toward the object so that the browning or scorching action can be performed in a short time as rapidly as the object can be heated solely by the application of high frequency energy.
Inventors
- 👤 Yoshio Yasuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:27
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/72; H05B6/725; H05B6/647; H05B6/6482; H05B6/6485
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
82 words
In a high frequency microwave oven, an oven-defining structure comprising upper, lower, and side walls made of metal, means for supplying high-frequency energy to said structure through an opening provided in one of said walls, a casing spacedly provided within said structure for therein accommodating means for creating a forced circulation of air and a heating assembly accommodated within said casing and including a plurality of parallely juxtaposed heating elements supported by a plurality of heat insulating blocks provided within said casing.
Claim 2
Dependent Claim
82 words
In a high frequency microwave oven, an oven-defining structure comprising upper, lower, and side walls made of metal, means for supplying high-frequency energy to said structure through an opening provided in one of said walls, a casing spacedly provided within said structure for therein accommodating means for creating a forced circulation of air and a heating assembly accommodated within said casing and including a plurality of parallely juxtaposed heating elements supported by a plurality of heat insulating blocks provided within said casing.
Claim 3
Dependent Claim
52 words
The high frequency oven construction according to claim 1, wherein said means for creating a forced circulation of air comprises a fan adapted to be driven by means of an electric drive device for directing an air toward said heating assembly which is in turn directed to an object to be heated.
Claim 4
Dependent Claim
24 words
The high frequency oven construction according to claim 1, wherein said heating elements comprises a sheet of nickel chromium shaped into a zigzag configuration.
Claim 5
Dependent Claim
43 words
The high frequency oven construction according to claim 1, further comprising means for orienting hot air created by said heating element past said heating assembly, toward an object to be heated which has been placed on the lower wall of said oven-defining structure.
Claim 6
Dependent Claim
28 words
The high frequency oven construction according to claim 1, wherein said heating assembly is provided with means for exclusively downwardly reflecting heat energy created by said heating elements.
Claim 7
Dependent Claim
40 words
The high frequency oven construction according to claim 1, further comprising an enclosure for effecting a forced circulation of air in a regular manner without accompanying any noise in cooperation with said means for creating the forced circulation of air.
Claim 8
Dependent Claim
33 words
The high frequency oven construction according to claim 1, further comprising a metallic panel formed with a plurality of small holes for shielding the invasion of high frequency energy into said heating assembly.
Claim 9
Dependent Claim
38 words
The high frequency oven construction according to claim 1, wherein said heating assembly and said means for creating the forced circulation of air are adapted to be operated in synchronism with a magnetron for producing high frequency energy.
Claim 10
Dependent Claim
41 words
The high frequency oven construction according to claim 1, wherein said means for creating a forced circulation of air comprises a fan adapted to be driven by a power transmitted from an electric drive device adapted for operating a mode changer.
Claim 11
Dependent Claim
42 words
The high frequency oven construction according to claim 7, wherein said metallic panel is provided with a plurality of means for exclusively downwardly orienting toward an object to be heated hot air that has been created by a plurality of heating elements.
Claim 12
Dependent Claim
108 words
Oven apparatus for cooking a food substance disposed therein, said apparatus comprising: an outer casing comprising upper, lower, and side walls, said outer casing having an opening therein; means for supplying high frequency energy through said opening into said outer casing to produce standing electromagnetiC field waves within said outer casing; means for generating thermal energy disposed inside said outer casing; and means for providing and directing a circulation of air along a first path from said thermal means to the food substance to be cooked and along a second path disposed between said first path and said side walls from the food substance to said thermal means.
Claim 13
Dependent Claim
108 words
Oven apparatus for cooking a food substance disposed therein, said apparatus comprising: an outer casing comprising upper, lower, and side walls, said outer casing having an opening therein; means for supplying high frequency energy through said opening into said outer casing to produce standing electromagnetiC field waves within said outer casing; means for generating thermal energy disposed inside said outer casing; and means for providing and directing a circulation of air along a first path from said thermal means to the food substance to be cooked and along a second path disposed between said first path and said side walls from the food substance to said thermal means.
Claim 14
Dependent Claim
36 words
Oven apparatus as claimed in claim 11, wherein the air directed along said second path is cooler than that air directed along said first path to thereby provide a thermal insulation barrier for said outer casing.
Claim 15
Dependent Claim
79 words
Oven apparatus as claimed in claim 11, wherein there is included a second inner casing for supporting said heating means centrally thereof and for supporting said air circulation means so as to direct air along said first path past said thermal means and onto to the food substance, said second inner casing including a return passage for the circulation of air along said second path disposed between said thermal means and the side walls of said second inner casing.
Claim 16
Dependent Claim
28 words
Apparatus as claimed in claim 3, wherein said second inner casing includes louver means for directing the circulation of air along said first path onto the food substance.
Claim 17
Dependent Claim
41 words
Apparatus as claimed in claim 3, wherein said second inner casing includes thermal energy reflecting means disposed between said air circulation means and said thermal means, said reflecting means having openings therein for the passage of air along said first path.
References Cited (Backward Citations)
US2831952A
Cited
US3529582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |