US3851133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oven with antenna chamber, antenna, and radiation slots
Assignee: Husqvarna Vapenfabriks AB
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Filing: 1974-02-20
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Granted: 1974-11-26
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Expires: 1994-02-20
Abstract
Abstract A microwave oven having symmetrical distribution of the microwave energy fed thereto. The oven comprises an ovenchamber and an antenna chamber which is provided with an antenna system fed with microwave energy. The antenna chamber is disposed adjacent to the oven chamber and microwave energy is transferred thereto through radiation slots disposed in that side of the oven chamber adjacent the antenna chamber. The dimensions of the radiation slots, the oven chamber and the antenna bear a direct relationship to the wavelength of the microwave energy employed.
Inventors
- 👤 H Dygve
- 👤 P Risman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:37
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/72; H05B6/725; H05B6/6426
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
A microwave oven for processing food with microwave radiation and comprising: an oven chamber, the top and bottom walls of which are spaced apart by substantially no more than one wavelength of said microwave radiation, said oven chamber having a door for access thereto and at least one side thereof having a plurality of radiation openings for the introduction of said microwave energy thereto; antenna chamber means disposed adjacent to said at least one side of said oven chamber so that said radiation openings radiatively communicate said antenna chamber means with said oven chamber; antenna means disposed in said antenna chamber, said antenna means having feeding means connnected thereto for receiving said microwave radiation located substantially in the center of said antenna chamber means and having structural distributing elements which lie in a plane substantially parallel to said radiation openings in said at least one side of said oven chamber.
Claim 2
Dependent Claim
150 words
A microwave oven for processing food with microwave radiation and comprising: an oven chamber, the top and bottom walls of which are spaced apart by substantially no more than one wavelength of said microwave radiation, said oven chamber having a door for access thereto and at least one side thereof having a plurality of radiation openings for the introduction of said microwave energy thereto; antenna chamber means disposed adjacent to said at least one side of said oven chamber so that said radiation openings radiatively communicate said antenna chamber means with said oven chamber; antenna means disposed in said antenna chamber, said antenna means having feeding means connnected thereto for receiving said microwave radiation located substantially in the center of said antenna chamber means and having structural distributing elements which lie in a plane substantially parallel to said radiation openings in said at least one side of said oven chamber.
Claim 3
Dependent Claim
26 words
An oven as claimed in claim 1 wherein said radiation openings are slot-shaped having a length substantially equal to half a wavelength of said microwave radiation.
Claim 4
Dependent Claim
22 words
An oven as claimed in claim 2 wherein said slot-shaped radiation openings are disposed in said bottom wall of said oven chamber.
Claim 5
Dependent Claim
74 words
An oven as claimed in claim 3 wherein said antenna chamber means is disposed adjacent to said bottom wall of said oven chamber and has a height of substantially no more than one half of a wavelength of said microwave energy, which height is measured between the top side of said antenna chamber means adjacent said bottom wall of said oven chamber, and the bottom side of said antenna chamber means substantially parallel thereto.
Claim 6
Dependent Claim
44 words
An oven as claimed in claim 4 wherein said antenna means receives microwave radiation at said feeding means by means of wave-guide transition, and said feeding means comprising a feeder line connected to said antenna means through a wall of said antenna chamber means.
Claim 7
Dependent Claim
44 words
An oven as claimed in claim 5 wherein said structural distributing elements of said antenna means comprise at least two metal rods disposed crosswise to one another so as to define an interconnecting point thereof which interconnecting points is joined to said feeder line.
Claim 8
Dependent Claim
27 words
An oven as claimed in claim 4 wherein a reactance stub is disposed in said antenna chamber means between said top side and said bottom side thereof.
Claim 9
Dependent Claim
27 words
An oven as claimed in claim 1 wherein said feeding means comprises rotatable means whereby said antenna means connected thereto is rotatable in said antenna chamber means.
References Cited (Backward Citations)
US3641301A
Cited
US3742177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |