Patent US4330698A successfully refreshed from Google Patents.
US4330698A
Expired / Lapsed
US
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Microwave melter
Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
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Filing: 1980-04-21
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Granted: 1982-05-18
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Expires: 2000-04-21
Abstract
Abstract A microwave melter in which a material charged in a crucible is heated and melted by irradiation of microwaves, the melter including a melting furnace having an upper furnace body fixedly mounted on a support structure and a lower furnace body detachably connectable with the upper furnace body, a waveguide for guiding microwaves from a microwave generator toward the furnace, a crucible received rotatably and in a suspended state in the lower furnace body, and a feed pipe for feeding untreated material to the crucible.
Inventors
- 👤 Yoshihisa Sawada
- 👤 Fumiaki Komatsu
- 👤 Kazuo Sanada
- 👤 Yorihisa Sakaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
F; F27; F27B; F27B14/00; F27B14/08; F27B14/14; F27B14/06; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; F27B14/04; F27B2014/0837; F27B2014/0887; F27D; F27D17/00; F27D17/30; F27D3/00; F27D2003/0034; F27D2003/0075; F27D2003/0085; F27D2003/0087; F27D99/00; F27D99/0001; F27D99/0006; F27D2099/0028; H05B2206/00; H05B2206/04; H05B2206/045
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A microwave melter of the type in which material charged in a crucible of a furnace is heated and melted by irradiation of microwaves from a microwave oscillator, said melter comprising: a waveguide connected to said microwave oscillator for guiding microwaves toward the furnace; an upper furnace body connected to said waveguide; a lower furnace body detachably connected to said upper furnace body; a rotatable container provided in said lower furnace body and adapted to rotate said crucible in a suspended state; a feed pipe for feeding untreated material to said crucible; and a tuner mounted on top of said upper furnace body for tuning said microwaves.
Claim 2
Dependent Claim
107 words
A microwave melter of the type in which material charged in a crucible of a furnace is heated and melted by irradiation of microwaves from a microwave oscillator, said melter comprising: a waveguide connected to said microwave oscillator for guiding microwaves toward the furnace; an upper furnace body connected to said waveguide; a lower furnace body detachably connected to said upper furnace body; a rotatable container provided in said lower furnace body and adapted to rotate said crucible in a suspended state; a feed pipe for feeding untreated material to said crucible; and a tuner mounted on top of said upper furnace body for tuning said microwaves.
Claim 3
Dependent Claim
55 words
A microwave melter of claim 1, said lower furnace body further comprising an inert gas feed pipe means to feed to a gap between the inner periphery of said lower furnace body and the outer periphery of said rotatable container an inert gas of a positive pressure relative to the internal pressure of said furnace.
Claim 4
Dependent Claim
24 words
A microwave melter of claim 1, said rotatable container further comprising a rotational shaft and a rotating mechanism disposed at the bottom portion thereof.
Claim 5
Dependent Claim
42 words
A microwave melter of claim 1, said waveguide further comprising a plurality of air-tight spacers at spaced positions along the length thereof for maintaining the space defined between said spacers at a positive pressure relative to the pressure of the furnace atmosphere.
Claim 6
Dependent Claim
79 words
A microwave melter of claim 1, said tuner further comprising a longitudinal bore extending along the entire length thereof from an upper to a lower end thereof, a net of conductive material located at the inner end of said longitudinal bore, a glass window member provided at the outer end of said longitudinal bore, inner gas feed pipe means for introducing an inert gas into said longitudinal bore, and cooling means for cooling a body portion of said tuner.
Claim 7
Dependent Claim
17 words
A microwave melter of claim 1, said rotatable container being detachably mounted on said lower furnace body.
References Cited (Backward Citations)
US2586754A
Cited
US3429359A
Cited
US3770870A
Cited
US3777106A
Cited
US4039797A
Cited
US4221680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |