US4144434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave heating devices
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
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Filing: 1976-06-14
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Granted: 1979-03-13
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Expires: 1996-06-14
Abstract
Abstract In a microwave cylindrical heating TM 010 cavity for continuous heating of rods, wires, etc. . . focussing means are provided surrounding the entry and or the exit to locally concentrate the microwave energy on the object to be heated. Said means consists in 45° annular wedge. As variants focussing is achieved by ferromagnetic annulus.
Inventors
- 👤 Bernard Chiron
- 👤 Michel DE Vecchis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:56
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/788; H01; H01P; H01P7/00; H01P7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
In a cylindrical microwave cavity of the type having entrance and exit apertures in opposite end walls and aligned on the longitudinal axis of the cavity and in which the cavity is excited in the TM 010 mode for the heating of thin thread-like objects fed continuously through the cavity along the longitudinal axis thereof, a hollow plunger positioned in said entrance aperture and having a cylindrical passageway coaxial with the longitudinal axis of the cavity, the inner end of said passageway being conically flared at an angle of 45° to said axis, said plunger being a focusing means for concentrating the energy at a point on said axis near said entrance aperture without disturbing the mode distribution therein.
Claim 2
Dependent Claim
119 words
In a cylindrical microwave cavity of the type having entrance and exit apertures in opposite end walls and aligned on the longitudinal axis of the cavity and in which the cavity is excited in the TM 010 mode for the heating of thin thread-like objects fed continuously through the cavity along the longitudinal axis thereof, a hollow plunger positioned in said entrance aperture and having a cylindrical passageway coaxial with the longitudinal axis of the cavity, the inner end of said passageway being conically flared at an angle of 45° to said axis, said plunger being a focusing means for concentrating the energy at a point on said axis near said entrance aperture without disturbing the mode distribution therein.
References Cited (Backward Citations)
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US2600186A
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US3376524A
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US3461261A
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US3590202A
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DE2417577A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |