Patent ID: 8455803

Claim:
A wave choke device for an oven door of a microwave oven, comprising: a front shielding comprising at least one conductive material, wherein the front shielding extends across an opening in the microwave oven; a wave trap forming a channel with one at least partially open side, which wave trap is arranged on at least one outer portion of the front shielding and comprises at least one conductive material; and a plurality of lamellae arranged, in particular uniformly, in the at least partially open side of the wave trap, which lamellae comprise at least one conductive material, wherein: the wave choke device comprises one single piece made of a material that is generally uniformly perforated throughout, wherein the generally uniform perforations in the material are smaller than the wavelengths of the microwaves produced by the microwave oven such that the microwaves cannot pass the wave choke; and said one single piece includes at least the front shielding and the wave trap, wherein the generally uniform perforations in the one single piece make the front shielding optically transparent to enable visual inspection through the oven door while stilling holding back microwaves.