US4926837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooking ovens
Assignee: New World Domestic Appliances Ltd
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Filing: 1989-06-27
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Granted: 1990-05-22
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Expires: 2009-06-27
Abstract
Abstract A cooking oven, preferably in the form of a gas combination microwave oven comprises a gas burner 8 affording a source of convected heat and an electrical heating element 10 both of which are used to reduce the initial warm-up time of the oven.
Inventors
- 👤 Christopher Parker
- 👤 Gordon T. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:52
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/647; H05B6/6473; F; F24; F24C; F24C1/00; F24C1/02; F24C1/04; F24C15/00; F24C15/32; F24C15/322; F24C15/325; F24C3/00; F24C3/12; F24C3/126; F24C3/128
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
205 words
A cooking oven comprising: (a) oven means including a back wall, a bottom wall and a top wall, (b) a second wall spaced from said back wall and extending from the bottom wall to the top wall of said oven means and forming with said back wall a heating compartment, (c) said heating compartment including an electric heating means and a gas heating means, (d) a fan means in said heating compartment, (e) an intake vent in said second wall in proximity to said fan means, (f) output vents in said wall spaced above and below said intake vent, (g) a baffle extending upwardly from the bottom wall of said oven means in said heating compartment and spaced between said back wall and said second wall and extending upwardly to said intake vent, (h) said gas heating means positioned between said baffle and said second wall adjacent said oven bottom wall, (i) said baffle including an inside facing said second wall and an outside facing said back wall, (j) said electric heating means positioned at the outside of said baffle, (k) said oven including microwave means, and (l) means for automatically controlling said electric heating means, said gas heating means and said microwave heating means.
Claim 2
Dependent Claim
205 words
A cooking oven comprising: (a) oven means including a back wall, a bottom wall and a top wall, (b) a second wall spaced from said back wall and extending from the bottom wall to the top wall of said oven means and forming with said back wall a heating compartment, (c) said heating compartment including an electric heating means and a gas heating means, (d) a fan means in said heating compartment, (e) an intake vent in said second wall in proximity to said fan means, (f) output vents in said wall spaced above and below said intake vent, (g) a baffle extending upwardly from the bottom wall of said oven means in said heating compartment and spaced between said back wall and said second wall and extending upwardly to said intake vent, (h) said gas heating means positioned between said baffle and said second wall adjacent said oven bottom wall, (i) said baffle including an inside facing said second wall and an outside facing said back wall, (j) said electric heating means positioned at the outside of said baffle, (k) said oven including microwave means, and (l) means for automatically controlling said electric heating means, said gas heating means and said microwave heating means.
Claim 3
Dependent Claim
29 words
The oven means of claim 1, further comprising: (a) temperature sensing control means for sequentially operating said gas heating means, and said electric heating means and said microwave means.
Claim 4
Dependent Claim
26 words
The oven means of claim 1, further comprising: (a) control means for simultaneously operating said gas heating means, said electric heating means and said microwave means.
Claim 5
Dependent Claim
48 words
The oven means of claim 1, wherein: (a) said electric heating means includes a plurality of coils, (b) said coils are disposed around said fan means in the path of air circulated by said fan, further comprising: air circulated by said fan means will flow between said coils.
Claim 6
Dependent Claim
54 words
The oven means of claim 1, further comprising: (a) temperature regulating means for regulating heat output of said oven compartment heating means according to temperature, and (b) said temperature regulating means including means for activating said microwave cooking means and simultaneously de-activating said electric heating means when a predetermined oven compartment temperature is reached.
Claim 7
Dependent Claim
102 words
A cooking oven comprising: (a) means forming an oven cavity, (b) said oven cavity including electric heating means for heating said oven cavity, (c) said oven cavity further including gas heating means for heating said oven cavity, (d) said oven cavity further including a source of microwave energy, (e) oven control means for effecting simultaneous energization of said electric heating means and said gas heating means during an initial warm-up period of said oven, and (f) temperature regulating means operable when said oven cavity has attained a pre-determined temperature for de-energizing said electric heating means and energizing said source of microwave energy.
Claim 8
Dependent Claim
102 words
A cooking oven comprising: (a) means forming an oven cavity, (b) said oven cavity including electric heating means for heating said oven cavity, (c) said oven cavity further including gas heating means for heating said oven cavity, (d) said oven cavity further including a source of microwave energy, (e) oven control means for effecting simultaneous energization of said electric heating means and said gas heating means during an initial warm-up period of said oven, and (f) temperature regulating means operable when said oven cavity has attained a pre-determined temperature for de-energizing said electric heating means and energizing said source of microwave energy.
Claim 9
Dependent Claim
19 words
A cooking oven as claimed in claim 6, comprising a fan for circulating hot air in said oven cavity.
Claim 10
Dependent Claim
54 words
A cooking oven as claimed in claim 7, in which said fan is disposed in a rear wall of said oven cavity, and is effective for withdrawing air directly from said oven cavity and is effective for re-introducing said air to said oven cavity via one or more air vents in said rear wall.
Claim 11
Dependent Claim
26 words
A cooking oven as claimed in claim 8, in which the gas burner is provided in a floor of an oven housing, adjacent said rear wall.
Claim 12
Dependent Claim
31 words
A cooking oven as claimed in claim 9, in which means forming a gas burner chimney is provided around said burner, to direct hot gases to the vicinity of said fan.
Claim 13
Dependent Claim
18 words
A cooking oven as claimed in claim 7, in which said electric heater is disposed around said fan.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |