US4350874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot air supply type electric oven
Assignee: IMANISHI FLEXIBLE TUBE Mfg CO Ltd
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Filing: 1980-08-14
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Granted: 1982-09-21
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Expires: 2000-08-14
Abstract
Abstract An electric oven comprises a base made of a heat-resisting material and provided with a meat support member, an outer case removably rested on a stepped portion of the peripheral wall of the base, a reflector disposed within the outer case in the neighborhood of a ceiling thereof to define an upper radiating chamber and a lower heating chamber, a heat generator provided within the heating chamber, and a hot air fan also provided within the heating chamber and serving to transfer heat generated from the heat generator as hot air into a roasting chamber defined within the outer case. The hot air fan is driven from a drive motor, which also drives a cooling fan disposed within the radiating chamber. The outer case is provided with a switch means for closing and opening an electric circuit connecting a power source to the heat generator and motor for driving the hot air fan and cooling fan such that the electric circuit is closed when the outer case is placed on the base and opened when the outer case is raised.
Inventors
- 👤 Hideo Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:46
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/01; A47J37/015; F; F24; F24C; F24C15/00; F24C15/32; F24C15/322
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
175 words
An electric oven of hot air supply type comprising a base made of a heat-resistant material, a meat support member mounted to said base, said base including a planar portion and a peripheral wall portion extending transversely therefrom, said peripheral wall portion having a stepped surface at its upper end, a case member removably mounted on a stepped surface of said peripheral wall portion of said base to define a roasting chamber within said case member and base member, a reflector mounted within said case member adjacent the upper end thereof and defining a heating chamber and a radiating chamber, a heat generator mounted within said heating chamber, a hot air fan mounted within said heating chamber for transferring heat generated by said heat generator as hot air to said roasting chamber, a cooling fan provided within said radiating chamber adjacent to said heating chamber, and a motor provided atop said case member and coupled to said cooling fan and said hot air fan for simultaneously driving said cooling fan and said hot air fan.
Claim 2
Dependent Claim
175 words
An electric oven of hot air supply type comprising a base made of a heat-resistant material, a meat support member mounted to said base, said base including a planar portion and a peripheral wall portion extending transversely therefrom, said peripheral wall portion having a stepped surface at its upper end, a case member removably mounted on a stepped surface of said peripheral wall portion of said base to define a roasting chamber within said case member and base member, a reflector mounted within said case member adjacent the upper end thereof and defining a heating chamber and a radiating chamber, a heat generator mounted within said heating chamber, a hot air fan mounted within said heating chamber for transferring heat generated by said heat generator as hot air to said roasting chamber, a cooling fan provided within said radiating chamber adjacent to said heating chamber, and a motor provided atop said case member and coupled to said cooling fan and said hot air fan for simultaneously driving said cooling fan and said hot air fan.
Claim 3
Dependent Claim
93 words
An electric oven according to claim 1, comprising an electric circuit connectable to a power source to energize said heat generator and also to said motor, switch means on said case member for opening and closing said electric circuit, said switch means including a switch rod adapted to be raised relative to said case member to close said electric circuit when said case member is placed on said base and lowered relative to said case member by the weight of said rod to open said electric circuit when said case member is raised.
Claim 4
Dependent Claim
38 words
An electric oven according to claim 1, further comprising an automatic temperature controller within said radiating chamber operative to control said electric circuit for said heat generator responsive to the temperature of the inside of said heating chamber.
Claim 5
Dependent Claim
29 words
An electric oven according to claim 1, further comprising support legs depending from said case member on its end rested on said stepped surface of said peripheral wall portion.
Claim 6
Dependent Claim
24 words
An electric oven according to claim 1, wherein said hot air fan is a turbo-fan and wherein said cooling fan is a Silocco fan.
Claim 7
Dependent Claim
38 words
An electric oven according to claim 2, further comprising an automatic temperature controller within said radiating chamber operative to control said electric circuit for said heat generator responsive to the temperature of the inside of said heating chamber.
Claim 8
Dependent Claim
29 words
An electric oven according to claim 6, further comprising support legs depending from said case member on its end rested on said stepped surface of said peripheral wall portion.
Claim 9
Dependent Claim
24 words
An electric oven according to claim 7, wherein said hot air fan is a turbo-fan and wherein said cooling fan is a Silocco fan.
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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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |