Title (en)

METHOD AND DEVICE TO HOMOGENIZE THE HEATING OF FOOD IN A COOKING OVEN HEATED BY MICROWAVES

Publication

EP 0277342 A3 19880831 (DE)

Application

EP 87118985 A 19871221

Priority

DE 3703133 A 19870203

Abstract (en)

[origin: EP0277342A2] The known methods for homogenising the field distribution in a cooking space heated by microwaves, such as rotating antennas, rotating plates and wave stirrers, are relatively expensive. The characteristic impedance is periodically changed by means of a rotating element (5) arranged in the waveguide (3) between the magnetron (1) and the injection aperture (6) into the cooking space (2). In this way, the output frequency of the magnetron is also changed, resulting in homogenisation of the field. <IMAGE>

IPC 1-7

H05B 6/70

IPC 8 full level

H05B 6/70 (2006.01)

CPC (source: EP)

H05B 6/707 (2013.01); H05B 6/745 (2013.01)

Citation (search report)

• [X] US 4301347 A 19811117 - QUINE JOHN P
• [A] FR 1112162 A 19560309 - RAYTHEON MFG CO
• [A] DE 1907166 A1 19690911 - VARIAN ASSOCIATES
• [A] US 2761942 A 19560904 - HALL WILLIAM M
• [A] FR 1208182 A 19600222 - MIWAG MIKROWELLEN A G
• [A] FR 1341837 A 19631102 - PATENTVERWERTUNGS & ELEKTRO HO
• [A] FR 2119479 A5 19720804 - PHILIPS NV
• [A] US 4336434 A 19820622 - MILLER MATTHEW S

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI NL

DOCDB simple family (publication)

EP 0277342 A2 19880810; EP 0277342 A3 19880831; EP 0277342 B1 19930707; AT E91375 T1 19930715; DE 3703133 A1 19880811; DE 3786451 D1 19930812

DOCDB simple family (application)

EP 87118985 A 19871221; AT 87118985 T 19871221; DE 3703133 A 19870203; DE 3786451 T 19871221