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US3867607A Expired / Lapsed US ⏱️ 0.0 years remaining

Hybrid microwave heating apparatus

Assignee: New Nippon Electric Co Ltd
•
Filing: 1973-12-03
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Granted: 1975-02-18
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Expires: 1993-12-03
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Abstract

Abstract An apparatus for the treatment of materials by the application of heat for rapid drying, cooking, curing or the like of the materials, including an enclosure having microwave generators both of the magnetron type device and the solid state type oscillators. The magnetron device supplies a relatively large power constantly and each of the solid state oscillators supplies a small power, so that the combination of these different types of power generators in the microwave region provides the heating performance of continuously the output of the microwave power by selective operation of the solid state oscillators, or on-off operation of the magnetron device. For easy and continuous adjustment of the output microwave power in the apparatus, a plurality of solid state oscillators are arranged on several walls of the oven or are placed removably within the oven by means of a tray assembly. The apparatus is also provided with duct means for the solid state oscillators in order to maintain the high efficiency as well as to obtain a uniform heating effect.

Inventors

  • 👤 Tetsuro Ohtani

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 01:11
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/70; H05B6/705; H05B2206/00; H05B2206/04; H05B2206/044; Y; Y02; Y02B; Y02B40/00

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 51 words
A microwave heating apparatus comprising an enclosure, a magnetron mounted on said enclosure for directing microwave energy into said enclosure, and a plurality of solid state oscillators mounted to direct microwave energy into said enclosure, whereby the microwave power and the distribution of temperature in said apparatus may be readily controlled.
Claim 2
Dependent Claim 51 words
A microwave heating apparatus comprising an enclosure, a magnetron mounted on said enclosure for directing microwave energy into said enclosure, and a plurality of solid state oscillators mounted to direct microwave energy into said enclosure, whereby the microwave power and the distribution of temperature in said apparatus may be readily controlled.
Claim 3
Dependent Claim 53 words
The apparatus of claim 1, wherein said solid state oscillators are mounted on at least one wall of said apparatus, further comprising air duct means externally covering said oscillators, and means directing cooling air through said air duct means for cooling said oscillators, whereby the efficiency of operation of said oscillators is increased.
Claim 4
Dependent Claim 31 words
The apparatus of claim 1, further comprising support means within said enclosure, said solid state oscillators being mounted on said supporting means, said supporting means being movably mounted within said enclosure.
Claim 5
Dependent Claim 49 words
The microwave heating apparatus of claim 1, further comprising a rotatable support mounted within said enclosure, said solid state oscillators being mounted on said rotatable support, wherein said rotatable support comprises a hemispherical body so as to distribute microwave enerby uniformly by using reflection from walls of the enclosure.
Claim 6
Dependent Claim 56 words
The microwave heating apparatus of claim 1, further comprising a rotatable support mounted within the central portion partitioning said enclosure, said solid-state oscillator being mounted on said rotatable support, wherein said rotatable support comprises a tubular member mounted for rotation about its axis so as to distribute microwave energy uniformly within each partition of the enclosure.
Claim 7
Dependent Claim 60 words
The microwave heating apparatus of claim 1, further comprising a movable tray freely hung within said apparatus, said solid state oscillators being mounted on said tray, and means fixed on the outside of said enclosure for moving said tray, wherein said tray is so shaken in at least one direction tHat the microwave energy is distributed uniformly in said apparatus.

References Cited (Backward Citations)

US3494723A Cited
US3557333A Cited
US3691338A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-02-17 1978-08-19 1979-02-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-02-17 1982-08-19 1983-02-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-02-17 1986-08-19 1987-02-18 $7700.00 Window Closed / Lapsed

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