Patent US4167720A successfully refreshed from Google Patents.
US4084571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
See-through oven door with reticulated heat shield
Assignee: White Consolidated Industries Inc
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Filing: 1976-09-20
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Granted: 1978-04-18
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Expires: 1996-09-20
Abstract
Abstract An air cooled and insulated, see-through oven door for pyrolytic self-cleaning ovens including a reticulated metallic heat shield positioned between an inner glazed window pack assembly and an outer glass panel. Such reticulated heat shield has an inner reflective surface facing the oven cavity to assist in retaining heat and a black outer surface facing outwardly to reduce the reflection of outside light for improved viewing of the oven cavity through the door.
Inventors
- 👤 Robert Henry McFarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/02; F24C15/04; F24C15/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
In combination with a domestic range having an oven cavity capable of being cleaned by heat, a see-through oven door comprising an outer panel containing a glass window, an inner frame inwardly spaced from and attached to said outer panel and containing a window pack aligned with said window for viewing the oven cavity, said window pack being surrounded by insulation, a reticulated metallic heat shield fixedly secured in said space between said window and window pack to assist in retaining the heat in the oven cavity and thus correspondingly to decrease the surface temperature of the outer panel and glass window, and means for circulating cooling air upwardly through the space between said outer panel and inner frame and past the reticulated metallic heat shield to provide a cooling air wash therefor to assist in decreasing the surface temperature of the outer panel and glass window.
Claim 2
Dependent Claim
147 words
In combination with a domestic range having an oven cavity capable of being cleaned by heat, a see-through oven door comprising an outer panel containing a glass window, an inner frame inwardly spaced from and attached to said outer panel and containing a window pack aligned with said window for viewing the oven cavity, said window pack being surrounded by insulation, a reticulated metallic heat shield fixedly secured in said space between said window and window pack to assist in retaining the heat in the oven cavity and thus correspondingly to decrease the surface temperature of the outer panel and glass window, and means for circulating cooling air upwardly through the space between said outer panel and inner frame and past the reticulated metallic heat shield to provide a cooling air wash therefor to assist in decreasing the surface temperature of the outer panel and glass window.
Claim 3
Dependent Claim
32 words
The oven door defined in claim 1 wherein said reticulated metallic heat shield has a reflective inner surface facing said oven cavity to assist in retaining the heat within said oven cavity.
Claim 4
Dependent Claim
18 words
The oven door defined in claim 1 wherein said reticulated metallic heat shield is made of anodized aluminum.
Claim 5
Dependent Claim
46 words
The oven door defined in claim 3 wherein the inner surface of said anodized aluminum shield is untreated and the outer surface of said shield has a black coating thereon facing outwardly away from said oven cavity to decrease reflection of outside light for improved viewing.
Claim 6
Dependent Claim
24 words
The oven door defined in claim 1 wherein said reticulated metallic heat shield has a multitude of circular holes therein arranged in straight rows.
Claim 7
Dependent Claim
15 words
The oven door defined in claim 5 wherein approximatey 37% of said shield is open.
Claim 8
Dependent Claim
22 words
The oven door defined in claim 6 wherein there are approximately 225 holes per square inch of exposed surface of said shield.
Claim 9
Dependent Claim
37 words
The oven door defined in claim 1 wherein there are approximately 225 holes per square inch of exposed surface of said shield, each said hole being approximately 0.045 inch in diameter and located on 0.067 inch centers.
Claim 10
Dependent Claim
34 words
The oven door defined in claim 1 wherein there are at least two layers of insulation contained in said inner frame, including a first layer of high temperature insulation immediately adjacent the oven cavity.
Claim 11
Dependent Claim
50 words
The oven door defined in claim 9 wherein there are three layers of insulation contained in said inner liner, the second and third layers of insulation being of fiberglass-wool material located outwardly of said first layer of insulation and at least partially separated by a partition in said inner frame.
References Cited (Backward Citations)
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US3664326A
Cited
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Cited
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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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |