US4598689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven systems
Assignee: Microwave Ovens Ltd
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Filing: 1985-01-28
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Granted: 1986-07-08
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Expires: 2005-01-28
Abstract
Abstract An oven system comprises a grill unit and a microwave oven unit built into a standard kitchen unit framework or other structure for receiving same with the grill unit surmounting the microwave oven unit. A duct extends from the rear of the microwave oven unit, upwardly past the rear of the grill unit, over the top of the grill unit to a front exit. The rear wall of the cavity of the microwave oven unit has a vent communicating with the duct, and the rear wall of the cavity of the grill unit has a vent communicating with the duct. The microwave oven unit has a magnetron cooled by a blower which directs a flow of air through the duct, this flow being capable of venting both cavities.
Inventors
- 👤 Kenneth I. Eke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:28
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/642; F; F24; F24C; F24C15/00; F24C15/006; H05B6/6408; H05B6/6411
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
240 words
An oven system comprising a microwave oven unit having a first cavity, a microwave generator for supplying microwave power to said first cavity and thermal heating means for supplying thermal power to said first cavity, and a grill unit having a second cavity and a grill element for supplying thermal power to said second cavity, said microwave oven unit having a blower or fan capable of venting the first cavity, and duct means leading from said microwave oven unit, communicating with said second cavity and exiting to the surroundings, whereby said blower or fan causes air to flow from said microwave oven unit and along said duct means so as to entrain air from said second cavity and thereby vent the latter, means for activating the oven system which activates said blower or fan to generate a flow of air through said duct means, said first cavity being provided with a movable shutter which is movable between an open position in which the air from said blower or fan is blown into said first cavity and thence through a vent in a rear wall of said first cavity into said duct means, and a closed position in which air from said blower or fan is prevented from reaching said first cavity, said shutter being in the open position whenever the oven system is activated except when the thermal heating means are energized when said shutter is in its closed position.
Claim 2
Dependent Claim
240 words
An oven system comprising a microwave oven unit having a first cavity, a microwave generator for supplying microwave power to said first cavity and thermal heating means for supplying thermal power to said first cavity, and a grill unit having a second cavity and a grill element for supplying thermal power to said second cavity, said microwave oven unit having a blower or fan capable of venting the first cavity, and duct means leading from said microwave oven unit, communicating with said second cavity and exiting to the surroundings, whereby said blower or fan causes air to flow from said microwave oven unit and along said duct means so as to entrain air from said second cavity and thereby vent the latter, means for activating the oven system which activates said blower or fan to generate a flow of air through said duct means, said first cavity being provided with a movable shutter which is movable between an open position in which the air from said blower or fan is blown into said first cavity and thence through a vent in a rear wall of said first cavity into said duct means, and a closed position in which air from said blower or fan is prevented from reaching said first cavity, said shutter being in the open position whenever the oven system is activated except when the thermal heating means are energized when said shutter is in its closed position.
Claim 3
Dependent Claim
16 words
An oven system according to claim 1, wherein said grill unit surmounts said microwave oven unit.
Claim 4
Dependent Claim
53 words
An oven system according to claim 2, wherein said duct means lead from the back of said microwave oven unit, upwardly past the back of said grill unit, where said duct means communicate with said second cavity, over the top of said grill unit to a front exit disposed above said grill unit.
Claim 5
Dependent Claim
24 words
An oven system according to claim 1, wherein said blower or fan communicates with said microwave generator via air passage means for cooling same.
Claim 6
Dependent Claim
41 words
An oven system according to claim 1, wherein a by-pass duct extends from adjacent the magnetron to said duct means to provide a path for air from said magnetron to said duct means when said shutter is in its closed position.
Claim 7
Dependent Claim
46 words
An oven system according to claim 5, wherein said by-pass duct is open at all times so that when said shutter is in its open position a proportion of air blown over said magnetron by said blower motor reaches said duct means through said by-pass duct.
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) | 1989-07-07 | 1990-01-06 | 1990-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-07 | 1994-01-06 | 1994-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-07 | 1998-01-06 | 1998-07-08 | $7700.00 | Window Closed / Lapsed |