Abstract: The grills of the present disclosure provide several devices and methods for ensuring that cooking platens are level and provide the correct amount of pressure when cooking a food product. In contrast to currently available cooking devices, those of the present disclosure can be automatically leveled on set up, and adjust during or after operation, thus being able to withstand unpredicted events or normal use that may knock the grills out of level.

Abstract: In certain types of microwave ovens, e.g. ovens of the single-wall type, the manufacturing of the oven cavity (10) involves the forming of at least one groove-shaped recess (16) in at least one of the cavity walls (14). In order to substantially eliminate the disturbing effect of this recess (16) on the microwave field pattern in the oven cavity (10), a reflecting element in the shape of an elongated strip (18) of conductive material is provided in a position at the entrance opening of the recess (16), as seen from the oven cavity (10). The conductive strip (18) is preferably covered by dielectric material, e.g. in the shape of a dielectric plate (20) that also serves as support for the strip (18), and this strip (18) is so dimensioned and disposed at the opening of the recess (16) that it substantially reflects all incident microwave radiation coming from the oven cavity (10) at the operational frequency of the microwave oven.

Abstract: An arrangement for feeding microwave energy from a microwave source (14) to the oven cavity (10) of a microwave oven comprises an elongated groove-shaped recess (16) in one of the conductive cavity walls (17), into which recess (16) microwave energy is fed at a centrally located feeding point (15). At its open side the recess (16) is covered by a rotatable conductive plate (22) arranged very close to the cavity wall (17) so that the recess (16) together with the plate (22) will form a waveguide-like structure. The plate (22) is shaped so that during its rotation time-varying feeding passages between the recess (16) and the oven cavity (10) are formed at both opposite ends of the recess, the passages allowing the transfer of microwave energy from the recess (16) to the cavity (10). These measures result in a very simple and space-saving arrangement of the "dual feed" type.

Abstract: A microwave oven comprises an oven cavity (10) bounded by conductive walls (11-16) and a microwave source (17-19) situated such that microwave energy is fed from above into the oven cavity (10). A bottom plate (20) of a dielectric material is situated above the conductive bottom wall (16), on which plate (20) food to be heated (21) is placed. Two conductive ridges (24, 25) project from the conductive bottom wall (16), which ridges (24, 25) are situated adjacent and in parallel to the respective shorter conductive side walls (12, 14). The dielectric bottom plate (20) is placed and dimensioned such that a trapped TM resonant mode is generated in the space between the upper surface of the bottom plate (20) and the conductive bottom wall (16).