Microwave oven with turntable and weight sensor

Details Microwave oven with turntable and weight sensor Microwave oven with turntable and weight sensor

1994-01-28

1995-07-04

Leung, Philip H.

Electric heating

Microwave heating

With control system

219518, 177208, H05B 668

Patent

active

054302757

ABSTRACT:
A microwave oven is provided with a weighing device comprising a plate having a vertically movable shaft, and a fluid-containing bladder or a fluid-containing piston and cylinder assembly, and a pressure sensor for sensing the weight of a food product to be cooked in the oven. The problem residing in that the electronic components included in prior-art weighing devices are placed in an unsuitable environment under the cavity bottom of the oven is solved by placing the electronic components on a circuit board for the remaining control electronics in a space separate from the space under the cavity bottom. This solution means that the vertically movable shaft generates a pressure change in the bladder or the piston and cylinder assembly. This pressure change is transmitted to the pressure sensor, which generates a weight-indicating signal.

REFERENCES:
patent: 1232983 (1917-07-01), Schenk
patent: 4219090 (1980-08-01), Dayton
patent: 4615405 (1986-10-01), Morino et al.
patent: 4895067 (1990-01-01), Ohji et al.
patent: 5129472 (1992-07-01), Du et al.

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