Magnetron for microwave ovens

Details Magnetron for microwave ovens Magnetron for microwave ovens

2005-03-15

2005-03-15

Van, Quang T. (Department: 3742)

Electric heating

Microwave heating

Enclosed cavity structure

C219S761000, C315S039510

Reexamination Certificate

active

06867405

ABSTRACT:
A magnetron includes a positive polar cylinder, a plurality of vanes, a filament, upper and lower shields, and upper and lower pole pieces. The vanes are disposed in the positive polar cylinder to constitute a positive polar section. The filament is disposed on an axis of the positive polar cylinder to define an activating space. The upper and lower shields cover a top and bottom of the filament, respectively. The upper and lower pole pieces are disposed to induce magnetic flux into the activating space. The upper shield preferably has a diameter ranging from 6.95 mm to 7.10 mm. Additionally, the lower shield preferably has a diameter ranging from 6.95 mm to 7.10 mm.

REFERENCES:
patent: 4558250 (1985-12-01), Tsuzurabara
patent: 5049782 (1991-09-01), Aiga et al.
patent: 5635797 (1997-06-01), Kitakaze et al.
patent: 5861716 (1999-01-01), Ogura
patent: 06-290712 (1994-10-01), None
patent: 0124402 (1997-09-01), None
patent: 20-0152111 (1999-07-01), None

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