US4761529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grilling or browning apparatus suitable for use in a microwave or convection oven
Assignee: QED Intellectual Property Ltd
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Filing: 1987-06-19
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Granted: 1988-08-02
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Expires: 2007-06-19
Abstract
Abstract A grilling compartment (1) includes two tungsten-halogen lamps (9,10) emissive of infra-red radiation and separated from a grilling area (5) by a ceramic protective screen (16). Infra-red radiation emitted by the lamps (9,10) passes through the protective screen (16) to irradiate the grilling area (5) to grill food placed therein. A metallic mesh screen (18) is also provided between the lamps (9,10) and the grilling area (5), only in close proximity to the lamps (9,10) and configured to provide a substantially uniform distribution of intensity of infra-red radiation over substantially the whole of the grilling area (5).
Inventors
- 👤 Michael N. Tsisios
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/0623; A47J37/0629; A47J37/0635; A47J37/08; A47J37/0807; F; F24; F24C; F24C7/00; F24C7/04; F24C7/046; H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; H05B3/744
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
172 words
An apparatus for grilling or browning food, the apparatus comprising a compartment having a region in which food to be grilled or browned can be placed; at least one infra-red emissive lamp having a longitudinal axis and being positioned to heat said region and screening means located between said lamp and said region and being effective to provide a substantially uniform distribution of heat in said region, wherein the screening means comprises a first sheet of a metallic mesh material arranged lengthwise with respect to the lamp and a second sheet of a metallic mesh material adjacent to said first sheet of a metallic mesh material, the second sheet being shorter than, and arranged centrally with respect to the ends of, said first sheet, the screening means being located in sufficiently close proximity to said at least one lamp as to absorb radiation produced by the lamp and re-radiate said radiation at a wavelength which is greater than that produced by the lamp and is more conducive to browning or grilling food.
Claim 2
Independent Claim
172 words
An apparatus for grilling or browning food, the apparatus comprising a compartment having a region in which food to be grilled or browned can be placed; at least one infra-red emissive lamp having a longitudinal axis and being positioned to heat said region and screening means located between said lamp and said region and being effective to provide a substantially uniform distribution of heat in said region, wherein the screening means comprises a first sheet of a metallic mesh material arranged lengthwise with respect to the lamp and a second sheet of a metallic mesh material adjacent to said first sheet of a metallic mesh material, the second sheet being shorter than, and arranged centrally with respect to the ends of, said first sheet, the screening means being located in sufficiently close proximity to said at least one lamp as to absorb radiation produced by the lamp and re-radiate said radiation at a wavelength which is greater than that produced by the lamp and is more conducive to browning or grilling food.
Claim 3
Dependent Claim
26 words
An apparatus according to claim 1 wherein said second sheet of a metallic mesh material is wider than said first sheet of a metallic mesh material.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 1 or claim 2 including a sheet of an infra-red transmissive material positioned between said lamp and said region.
Claim 5
Dependent Claim
31 words
An apparatus for grilling or browning food according to claim 3, further including an electrical resistance heating element to effect convection cooking of food placed in said region of said compartment.
Claim 6
Dependent Claim
33 words
An apparatus for grilling or browning food according to claim 3, further including a source of microwave energy and means for directing microwave energy from the source into said region of said compartment.
Claim 7
Independent Claim
154 words
An apparatus for grilling or browning food, the apparatus comprising a compartment having a region in which food to be grilled or browned can be placed; at least one infra-red emissive lamp having a longitudinal axis and being positioned to heat said region and screening means located between said lamp and said region and being effective to provide a substantially uniform distribution of heat in said region, wherein the screening means comprises a sheet of a metallic material having a plurality of apertures, the apertures having progressively different sizes and or spacings depending on the relative transverse distances of the apertures from the longitudinal axis of the lamp, and the screening means being located in sufficiently close proximity to said lamp as to absorb radiation produced by the lamp and re-radiate said radiation at a wavelength which is greater than that produced by the lamp and is more conductive to browning or grilling food.
Claim 8
Independent Claim
154 words
An apparatus for grilling or browning food, the apparatus comprising a compartment having a region in which food to be grilled or browned can be placed; at least one infra-red emissive lamp having a longitudinal axis and being positioned to heat said region and screening means located between said lamp and said region and being effective to provide a substantially uniform distribution of heat in said region, wherein the screening means comprises a sheet of a metallic material having a plurality of apertures, the apertures having progressively different sizes and or spacings depending on the relative transverse distances of the apertures from the longitudinal axis of the lamp, and the screening means being located in sufficiently close proximity to said lamp as to absorb radiation produced by the lamp and re-radiate said radiation at a wavelength which is greater than that produced by the lamp and is more conductive to browning or grilling food.
Claim 9
Dependent Claim
24 words
An apparatus according to claim 6 further including a sheet of a ceramic material positioned between said at least one lamp and said region.
Claim 10
Dependent Claim
28 words
An apparatus according to claim 7 wherein said sheet of a metallic material is formed by screen printing on a surface of said sheet of a ceramic material.
Claim 11
Independent Claim
37 words
An apparatus for grilling or browning food according to any one of claims 1, 2 and 6-8, further including an electrical resistance heating element to effect convection cooking of food placed in said region of said compartment.
Claim 12
Independent Claim
39 words
An apparatus for grilling or browning food according to any one of claims 1, 2 and 6-8, further including a source of microwave energy and means for directing microwave energy from the source into said region of said compartment.
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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) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |