US3893442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oven door with air cooling system
Assignee: General Electric Co
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Filing: 1974-10-03
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Granted: 1975-07-08
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Expires: 1994-10-03
Abstract
Abstract A door construction having a transparent sealed window for use with a high temperature self-cleaning baking and broiling oven. The innermost half of the door when viewed in cross-section is well insulated thermally, while the outermost half of the door is provided with an intermediate door panel that establishes two vertical cooling air channels. The intermediate door panel has rearwardly turned peripheral flanges that thermally shield the outer door panel from the innermost half of the door.
Inventors
- 👤 James J Nuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:58
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/02; F24C15/04; F24C15/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
207 words
A windowed oven door comprising an outer door panel, intermediate door panel positioned behind and spaced from the outer door panel, an inner door liner and an inner panel carried by the inner door liner, a multiple pane window module supported within the inner panel and the inner door liner, at least one window pane supported by the outer door panel, thermal insulation means combined within the inner panel and inner door liner in the area surrounding the said window module, the said intermediate door panel having a window opening substantially coinciding with the said window panes for allowing viewing, the intermediate door panel having a rearwardly facing peripheral flange at least along the two sides and the top edge of the door, the outer door panel having a rearwardly facing peripheral flange at least along the two sides of the door which overlies the adjacent flange of the intermediate door panel, and air entrance openings arranged along the bottom edge of the door and air outlet openings arranged in the top portion of the peripheral flange of the intermediate door panel, whereby room air may pass up through the door passing both sides of the intermediate door panel before exiting from the top of the door.
Claim 2
Dependent Claim
207 words
A windowed oven door comprising an outer door panel, intermediate door panel positioned behind and spaced from the outer door panel, an inner door liner and an inner panel carried by the inner door liner, a multiple pane window module supported within the inner panel and the inner door liner, at least one window pane supported by the outer door panel, thermal insulation means combined within the inner panel and inner door liner in the area surrounding the said window module, the said intermediate door panel having a window opening substantially coinciding with the said window panes for allowing viewing, the intermediate door panel having a rearwardly facing peripheral flange at least along the two sides and the top edge of the door, the outer door panel having a rearwardly facing peripheral flange at least along the two sides of the door which overlies the adjacent flange of the intermediate door panel, and air entrance openings arranged along the bottom edge of the door and air outlet openings arranged in the top portion of the peripheral flange of the intermediate door panel, whereby room air may pass up through the door passing both sides of the intermediate door panel before exiting from the top of the door.
Claim 3
Dependent Claim
69 words
A windowed oven door as recited in claim 1 wherein the said outer door panel has a shortened rearwardly turned peripheral flange along the top edge of the door which is not exposed to the flow from the air outlet openings in the flange of the intermediate door panel and forms an additional air outlet means between the flange of the outer door panel and the intermediate door panel.
Claim 4
Dependent Claim
127 words
A windowed overn door as recited in claim 2 wherein the upward air flow behind the intermediate door panel is relatively hot while the upward air flow in front of the intermediate door panel is relatively cool, the said window opening in the intermediate door panel being closely positioned with respect to the window pane of the outer door panel to separate the hot air flow behind the intermediate door panel from the cool air flow in front of the intermediate door panel, and an air gap formed between the intermediate door panel and the lower edge of the window pane of the outer door panel so as to bleed off some of the cool air to flow up the inner surface of the said window pane.
Claim 5
Dependent Claim
69 words
A windowed oven door as recited in claim 3 wherein the said inner door liner has forwardly facing peripheral flange that telescopes within the peripheral flange of the intermediate door panel, and means for spacing apart the peripheral flanges of the outer door panel, the intermediate door panel and the inner door liner to form thermal breaks therebetween and restrict the maximum temperature of the said outer door panel.
Claim 6
Dependent Claim
70 words
A windowed oven door as recited in claim 1 wherein the said inner door liner has a forwardly facing peripheral flange that telescopes within the peripheral flange of the intermediate door panel, and means for spacing apart the peripheral flanges of the outer door panel, the intermediate door panel and the inner door liner to form thermAl breaks therebetween and restrict the maximum temperature of the said outer door panel.
Claim 7
Dependent Claim
46 words
A windowed oven door as recited in claim 2 wherein the said window opening of the intermediate door panel is substantially sealed with respect to the said outer window pane so as to separate the air flows in front of and behind the intermediate door panel.
Claim 8
Dependent Claim
65 words
A windowed oven door as recited in claim 6 with secondary air inlet openings in the outer door panel adjacent the upper edge of the outer window pane for introducing additional room air into the air channel in front of the intermediate door panel in the area above the window so as to reduce the temperature of the upper section of the outer door panel.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |