Patent US4780596A successfully refreshed from Google Patents.
US4780596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air circulation cooking oven
Assignee: Toshiba Corp
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Filing: 1987-03-17
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Granted: 1988-10-25
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Expires: 2007-03-17
Abstract
Abstract A cooking oven includes a box-like casing defining a heating chamber wherein food in placed. A rear plate of the casing has a recess projecting outward, a number of suction holes cut in the bottom of the recess, and a number of discharge holes cut in sections located above and below the recess. A cover is fixed to the outer surface of the rear plate to define a storing chamber. In the storing chamber are arranged a fan for drawing air in the heating chamber into the storing chamber and discharging the air into the heating chamber, and a heater for heating the sucked air. The cover has a first air-directing section for directing part of the hot air from the fan in a direction parallel to the top plate of the casing, and a second air-directing section for directing part of the hot air in a direction different from the direction of the hot air directed by the first air-directing section.
Inventors
- 👤 Kazufumi Matsushima
- 👤 Yoshinari Arabori
- 👤 Kazuo Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:55
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/32; F24C15/322; F24C15/325
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
273 words
A hot air circulating cooker comprising: a box-like casing having top and bottom plates and a plurality of side plates which define a heating chamber, one of said side plates of said casing including a plurality of horizontally extending suction holes arranged between a plurality of horizontally extending upper and lower discharge holes; a cover fixed to the outer surface of said one side plate, said cover and said one side plate defining a storage chamber which communicates with said suction holes and said upper and lower discharge holes, said cover further including: a pair of a first air directing means located opposite said upper and lower discharge holes, respectively, and inclined at a first predetermined angle for directing part of said hot air in a direction substantially parallel to said top plate, and a pair of second air directing means located opposite said upper and lower discharge holes, respectively, and inclined at a second predetermined angle different from said first predetermined angle for directing part of said hot air in a direction different than the hot air directed by said first air directing means; a rotatable fan arranged in said storing chamber and facing said suction holes for drawing air from said heating chamber into said storing chamber through said suction holes and discharging said air toward said first and second air directing means so that it passes into said heating chamber through said discharge holes; a heater arranged in said storing chamber and extending along a periphery of said fan for heating said air drawn into said storing chamber to obtain said hot air; and drive means for rotating said fan.
Claim 2
Dependent Claim
273 words
A hot air circulating cooker comprising: a box-like casing having top and bottom plates and a plurality of side plates which define a heating chamber, one of said side plates of said casing including a plurality of horizontally extending suction holes arranged between a plurality of horizontally extending upper and lower discharge holes; a cover fixed to the outer surface of said one side plate, said cover and said one side plate defining a storage chamber which communicates with said suction holes and said upper and lower discharge holes, said cover further including: a pair of a first air directing means located opposite said upper and lower discharge holes, respectively, and inclined at a first predetermined angle for directing part of said hot air in a direction substantially parallel to said top plate, and a pair of second air directing means located opposite said upper and lower discharge holes, respectively, and inclined at a second predetermined angle different from said first predetermined angle for directing part of said hot air in a direction different than the hot air directed by said first air directing means; a rotatable fan arranged in said storing chamber and facing said suction holes for drawing air from said heating chamber into said storing chamber through said suction holes and discharging said air toward said first and second air directing means so that it passes into said heating chamber through said discharge holes; a heater arranged in said storing chamber and extending along a periphery of said fan for heating said air drawn into said storing chamber to obtain said hot air; and drive means for rotating said fan.
Claim 3
Dependent Claim
126 words
A cooking oven according to claim 1, wherein said second air directing means are inclined at an angle relative to said top plate so that said hot air from said fan is directed to an area within said heating chamber which is in a neighborhood of said discharge holes and further including upper and lower cooking trays arranged in said heating chamber, parallel to said top plate of said casing and spaced from each other, so that said suction holes are located in the space between said cooking trays, said upper discharge holes are located in the space between said top plate and said upper cooking tray and said lower discharge holes are located in the space between said bottom plate and said lower cooking tray.
Claim 4
Dependent Claim
45 words
A cooking oven according to claim 2, wherein said one side plate of said casing includes a recess projecting outward and located in the space between said upper and lower cooking trays, and wherein said suction holes are formed in the bottom of said recess.
Claim 5
Dependent Claim
73 words
A cooking oven according to claim 1, wherein said cover includes: a bottom substantially parallel to said one side plate of said casing; an upper plate and a lower plate inclined toward said upper and lower discharge holes, respectively, which constitutes said first air directing means; and an upper air directing plate and a lower air directing plate extending from said bottom toward said discharge holes which constitute said second air directing means.
Claim 6
Dependent Claim
33 words
A cooking oven according to claim 4, wherein said upper and lower air directing plates have a plurality of small holes for further guiding said hot air which is discharged from said fan.
Claim 7
Dependent Claim
75 words
A cooking oven according to claim 5, further including upper and lower cooking trays arranged in said heating chamber substantially parallel to said top plate of said casing and spaced from each other so that said suction holes are located between said cooking trays, said upper discharge holes are located between said top plate and said upper cooking tray and said lower discharge holes are located between said bottom plate and said lower cooking tray.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |