Microwave oven having an orthogonal electromagnetic seal

Details Microwave oven having an orthogonal electromagnetic seal Microwave oven having an orthogonal electromagnetic seal

1997-09-08

1999-09-28

Walberg, Teresa

Electric heating

Microwave heating

Radiation protection

B65D 2500

Patent

active

059582782

ABSTRACT:
An orthogonal electromagnetic seal for an oven that heats items through the use of microwave energy is set forth. The oven has a cavity in which the items are to be placed, an opening to the cavity, and peripheral surfaces that surround the opening to the cavity. One of the peripheral surfaces is orthogonal to the other peripheral surfaces. The electromagnetic seal includes a choke panel, a plurality of tabs, and a choke ring. The choke panel is aligned with and has generally the same shape as the opening. The plurality of tabs extend from a periphery of the choke panel. A first set of the plurality of tabs is generally parallel to the orthogonal peripheral surface. The remaining tabs are parallel with the other peripheral surfaces. Each of the plurality of tabs is positioned between the associated peripheral surface and the choke ring. A choke cavity adjacent to each peripheral surface is defined by the choke ring, the choke panel, and the adjacent peripheral surface. The choke cavity reflects energy propagating in a direction parallel to the adjacent one of the peripheral surface and suppressing energy propagating in a direction transverse to the adjacent one of the peripheral surfaces.

REFERENCES:
patent: 3666904 (1972-05-01), Krajewski et al.
patent: 3767884 (1973-10-01), Osepchuk et al.
patent: 4137441 (1979-01-01), Bucksbaum et al.
patent: 4176268 (1979-11-01), Gerling
patent: 4421968 (1983-12-01), Osepchuk
patent: 4709129 (1987-11-01), Osepchuk
patent: 5789724 (1998-08-01), Lerssen et al.
VanKoughnett, A. L., et al., "Doubly Corrugated Chokes For Microwave Heating Systems," Journal Of Microwave Power, 8(1), 1973, pp. 101-110.

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