Patent US4137442A successfully refreshed from Google Patents.
US4137442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency oven having a browning unit
Assignee: Sharp Corp
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Filing: 1977-09-15
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Granted: 1979-01-30
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Expires: 1997-09-15
Abstract
Abstract A browning unit is slidably provided in a high-frequency oven cavity. The browning unit is adjustable in location in the oven cavity with the use of a lever provided on an outside wall of the oven for controlling a browning or toasting condition of the exterior of foodstuffs. To prevent leakage of high-frequency energy, a choke mechanism is required at a point through which a lead wire and a supporter for the browning unit are provided.
Inventors
- 👤 Koichi Tateda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:58
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6408; H05B6/6411; H05B6/647; H05B6/6482; H05B6/76
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
A microwave cooking apparatus comprising: a. an oven cavity containing a means for supporting foodstuff, b. a magnetron operatively associated with said oven cavity for generating and introducing microwave energy into said oven cavity, c. a browning unit for browning foodstuffs contained in the oven cavity, d. a supporting member extending from the outside into the inside of said oven cavity for supporting the browning unit in said oven cavity, e. a shifting means operatively connected to said supporting member for shifting the position of the browning unit in the oven cavity relative to the means for supporting the foodstuff, f. a choke mechanism provided at the point of entry of said supporting member into the oven cavity, said supporting member passing through the choke mechanism, and g. an insulating member for slidably supporting the supporting member in the choke mechanism.
Claim 2
Dependent Claim
141 words
A microwave cooking apparatus comprising: a. an oven cavity containing a means for supporting foodstuff, b. a magnetron operatively associated with said oven cavity for generating and introducing microwave energy into said oven cavity, c. a browning unit for browning foodstuffs contained in the oven cavity, d. a supporting member extending from the outside into the inside of said oven cavity for supporting the browning unit in said oven cavity, e. a shifting means operatively connected to said supporting member for shifting the position of the browning unit in the oven cavity relative to the means for supporting the foodstuff, f. a choke mechanism provided at the point of entry of said supporting member into the oven cavity, said supporting member passing through the choke mechanism, and g. an insulating member for slidably supporting the supporting member in the choke mechanism.
Claim 3
Dependent Claim
68 words
The microwave cooking apparatus of claim 1, wherein a slidable lever is provided on an outside wall of the microwave cooking apparatus and is connected to said shifting means, said shifting means being adjusted in height in the microwave oven cavity in response to the operation of the slidable lever, and a coupling means for coupling the supporting member to the shifting means outside the microwave over cavity.
Claim 4
Dependent Claim
32 words
The microwave cooking apparatus of claim 1, further comprising an indent provided in the side wall of the oven cavity, at the point where the supporting member passes into the oven cavity.
Claim 5
Dependent Claim
62 words
The microwave cooking apparatus of claim 3 wherein the choke mechanism comprises: a. a metal block attached to the bottom wall of the indent, said metal block being adapted to receive said insulating member which in turn is adapted to slidably receive the supporting member, and b. a cylindrical channel provided within the metal block for preventing further leakage of microwave energy.
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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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |