US3820524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooking ovens
Assignee: Individual
•
Filing: 1973-02-15
•
Granted: 1974-06-28
•
Expires: 1993-02-15
Abstract
Abstract This invention is an oven particularly for heating frozen foods quickly by means of a gaseous vapour at superatmospheric pressure. Preferably steam is raised within the oven by applying water to a heated body and the atmosphere in the oven is circulated by a fan in heat-exchange relationship with the heated body. The water is applied at the centre of the heated body so that it is flashed rapidly into steam and also any water condensing on the sides of the oven is arranged to run down and back to the heated body for reflashing.
Inventors
- 👤 R Buckell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/32; F24C15/322; F24C15/327; A; A47; A47J; A47J27/00; A47J27/08; A47J27/086
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
An oven comprising a cooking chamber, means for supporting food in the chamber, a heater body, ducts and a fan arranged to circulate the atmosphere within the chamber over the heater body in heat-exchange relationship therewith, and thereafter to leave the ducts to enter the atmosphere around the supporting means, the heater body comprising two closely spaced plates, and a jet for injecting water into the middle of the space between the plates.
Claim 2
Dependent Claim
73 words
An oven comprising a cooking chamber, means for supporting food in the chamber, a heater body, ducts and a fan arranged to circulate the atmosphere within the chamber over the heater body in heat-exchange relationship therewith, and thereafter to leave the ducts to enter the atmosphere around the supporting means, the heater body comprising two closely spaced plates, and a jet for injecting water into the middle of the space between the plates.
Claim 3
Dependent Claim
50 words
An oven as claimed in claim 1 in which the heater body is closely spaced from the bottom of the oven, and the bottom of the oven is inclined to cause water condensing on the oven walls to flow to the heater body where it can be raised into steam.
Claim 4
Dependent Claim
34 words
An oven as claimed in claim 2 includes a normally-open valve leading from the chamber and arranged to be closed automatically in response to the temperature in the oven rising to a predetermined temperature.
Claim 5
Dependent Claim
34 words
An oven as claimed in claim 1 includes a normally-open valve leading from the chamber and arranged to be closed automatically in response to the temperature in the oven rising to a predetermined temperature.
Claim 6
Dependent Claim
91 words
An oven comprising a cooking chamber, means for supporting food in the chamber, a heater body, ducts and a fan arranged to circulate the atmosphere within the chamber over the heater body in heat-exchange relationship therewith, and thereafter to leave the ducts to enter the atmosphere around the supporting means, the heater body being closely spaced from the bottom of the oven, and the bottom of the oven being inclined to cause water condensing on the oven walls to flow to the heater body where it can be raised into steam.
Claim 7
Dependent Claim
91 words
An oven comprising a cooking chamber, means for supporting food in the chamber, a heater body, ducts and a fan arranged to circulate the atmosphere within the chamber over the heater body in heat-exchange relationship therewith, and thereafter to leave the ducts to enter the atmosphere around the supporting means, the heater body being closely spaced from the bottom of the oven, and the bottom of the oven being inclined to cause water condensing on the oven walls to flow to the heater body where it can be raised into steam.
Claim 8
Dependent Claim
35 words
An oven as claimed in claim 5 including a normally open valve leading from the chamber and arranged to be closed automatically in response to the temperature in the oven rising to a predetermined temperature.
Claim 9
Dependent Claim
26 words
An oven as claimed in claim 1 including means for introducing heated gaseous fluid at a pressure above the pressure outside the oven into the chamber.
Claim 10
Dependent Claim
32 words
An oven as claimed in claim 5 in combination with an electric storage heater which has an outlet for air heated in the heater to flow into the interior of the chamber.
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 |