Patent US3820525A successfully refreshed from Google Patents.
US3820525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation and convection heated oven
Assignee: Individual
•
Filing: 1973-08-10
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Granted: 1974-06-28
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Expires: 1993-08-10
Abstract
Abstract A radiation and convection heated oven in which infrared radiant heat is generated by one or more sets of coplanar positioned heaters, the radiation from each set of heaters being directed through a transparent reradiating panel, such as a fused quartz panel, forming a wall of an oven chamber. The oven chamber is provided with a plurality of shelves also transparent to the radiant heat and supporting heat absorbing containers. The radiation passing into the oven chamber being distributed in an essentially uniform pattern by reflecting surfaces for absorption by the containers as well as the exposed surfaces of food contained therein. Simultaneously, air is circulated past the set or sets of heaters and the transparent panels and around the food containers to control excess radiant temperatures and supplement the radiant heat applied to the food.
Inventors
- 👤 J Pond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:56
CPC Classifications
A; A21; A21B; A21B2/00; F; F24; F24C; F24C1/00; F24C1/08; F24C15/00; F24C15/32; F24C15/322; F24C3/00; F24C3/04; F24C3/047
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A radiation and convection heated oven, comprising: a. means defining an oven cavity having at least one radiant energy transmitting partition and a plurality of shelves for supporting food containers; b. a set of infrared radiant heaters arranged in rows and columns outwardly of said partition to produce a field of essentially uniformly distributed radiant energy for transmission through said partition wall into the oven chamber; c. means for circulating air past the radiant heaters and between the shelves whereby the food containers are subjected to radiant heat and convection heat; d. a first set of radiant energy deflecting surfaces disposed within the oven chamber adjacent the radiant energy transmitting partition; e. and a second set of deflecting surfaces disposed under selected shelves for directing radiant energy onto the contents of the container below.
Claim 2
Dependent Claim
134 words
A radiation and convection heated oven, comprising: a. means defining an oven cavity having at least one radiant energy transmitting partition and a plurality of shelves for supporting food containers; b. a set of infrared radiant heaters arranged in rows and columns outwardly of said partition to produce a field of essentially uniformly distributed radiant energy for transmission through said partition wall into the oven chamber; c. means for circulating air past the radiant heaters and between the shelves whereby the food containers are subjected to radiant heat and convection heat; d. a first set of radiant energy deflecting surfaces disposed within the oven chamber adjacent the radiant energy transmitting partition; e. and a second set of deflecting surfaces disposed under selected shelves for directing radiant energy onto the contents of the container below.
Claim 3
Dependent Claim
53 words
An oven as defined in claim 1, wherein: a. the containers have a radiant energy absorbing surface; b. the shelves are transparent to the radiant energy; c. and each of the second sets of deflecting surfaces is perforated to pass radiant energy for transmission through the corresponding shelf to the container supported thereon.
Claim 4
Dependent Claim
125 words
A radiation and convection heated oven, comprising: a. distributed infrared radiant heating means, forming opposed vertical walls; b. a partition confronting each of the radiant heating means in spaCed relation thereto, each partition being transparent, to the radiation therefrom; the partitions forming therebetween an oven chamber; c. a plurality of shelves disposed in the oven chamber between the partitions, the shelves also being transparent to radiation from the radiant heating means; d. a plurality of containers having radiant energy absorbing walls carried by the shelves; e. the oven chamber having end walls spaced from the partitions to form therewith passages for air circulation horizontally past the heater means and through the oven chamber between the shelves; f. and means for effecting said horizontal air circulation.
Claim 5
Dependent Claim
125 words
A radiation and convection heated oven, comprising: a. distributed infrared radiant heating means, forming opposed vertical walls; b. a partition confronting each of the radiant heating means in spaCed relation thereto, each partition being transparent, to the radiation therefrom; the partitions forming therebetween an oven chamber; c. a plurality of shelves disposed in the oven chamber between the partitions, the shelves also being transparent to radiation from the radiant heating means; d. a plurality of containers having radiant energy absorbing walls carried by the shelves; e. the oven chamber having end walls spaced from the partitions to form therewith passages for air circulation horizontally past the heater means and through the oven chamber between the shelves; f. and means for effecting said horizontal air circulation.
Claim 6
Dependent Claim
35 words
An oven as defined in claim 3, wherein: a. a panel is disposed in the oven chamber adjacent each partition and includes radiant energy deflecting vanes for controlling distribution of radiant energy to the containers.
Claim 7
Dependent Claim
32 words
An oven as defined in claim 3, wherein: a. radiant energy deflecting means is disposed under selected shelves for directing radiant energy onto the contents of containers disposed on the shelf below.
Claim 8
Dependent Claim
28 words
An oven as defined in claim 5, wherein: a. the deflecting means is slotted to pass a portion of the radiant energy for absorption by the container above.
Claim 9
Dependent Claim
110 words
A radiation and convection heated oven, comprising: a. means defining an oven cavity having at least one radiant energy transmitting partition and a plurality of shelves for supporting food containers; b. a set of infrared radiant heaters arranged in rows and columns outwardly of said partition to produce a field of essentially uniformly distributed radiant energy for transmission through said partition wall into the oven chamber; c. means for circulating air past the radiant heaters and between the shelves whereby the food containers are subjected to radiant heat and convection heat; d. and radiant energy deflecting vanes disposed adjacent the transmitting partition for directing the radiant energy against the containers.
Claim 10
Dependent Claim
110 words
A radiation and convection heated oven, comprising: a. means defining an oven cavity having at least one radiant energy transmitting partition and a plurality of shelves for supporting food containers; b. a set of infrared radiant heaters arranged in rows and columns outwardly of said partition to produce a field of essentially uniformly distributed radiant energy for transmission through said partition wall into the oven chamber; c. means for circulating air past the radiant heaters and between the shelves whereby the food containers are subjected to radiant heat and convection heat; d. and radiant energy deflecting vanes disposed adjacent the transmitting partition for directing the radiant energy against the containers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |