Global Patent Index - EP 0561208 A3

EP 0561208 A3 19931013 - INDUCTION COOKING PLATE

Title (en)

INDUCTION COOKING PLATE

Publication

EP 0561208 A3 19931013 (DE)

Application

EP 93103274 A 19930302

Priority

DE 4208250 A 19920314

Abstract (en)

[origin: EP0561208A2] The inductive hot plate heater has an induction coil (30) which is supplied with radiofrequency. The thickness and wire thickness of the individual conductors are of the order of magnitude of 0.2 mm for a normal frequency between 20 and 30 kHz (25 kHz). This small wire thickness has been found to produce particularly low losses. The arrangement of the induction hot plate (10) consists of thermal insulation (32), which is arranged under a plate (12) which is suitable for cooking vessels (13) to be placed on, of a screen (33) having branched, earthed lead structures, and of an induction coil (30) which is in the form of a disc and is fed back to the underneath side by means of a ferrite feedback plate (31). <IMAGE>

IPC 1-7

H05B 6/12; H05B 6/06

IPC 8 full level

H05B 6/06 (2006.01); H05B 6/12 (2006.01)

CPC (source: EP US)

H05B 6/062 (2013.01 - EP US); H05B 6/1263 (2013.01 - EP US)

Citation (search report)

  • [Y] BE 507158 A
  • [Y] US 3996442 A 19761207 - MORELAND II WILLIAM C, et al
  • [Y] US 4467162 A 19840821 - KONDO SHIGEKI [JP], et al
  • [Y] US 4013859 A 19770322 - PETERS JR PHILIP H
  • [A] EP 0057252 A2 19820811 - GRUENZWEIG HARTMANN GLASFASER [DE]
  • [A] EP 0277075 A2 19880803 - CABLECO SA [FR]
  • [A] EP 0291093 A2 19881117 - MATSUSHITA ELECTRIC IND CO LTD [JP]
  • [A] US 4163139 A 19790731 - MALARKEY TERENCE D [US], et al
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 14, no. 168 (E-912)30. März 1990 & JP-A-02 024 991 ( MATSUSHITA ELECTRIC IND. CO. ) 26. Januar 1990
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 12, no. 481 (E-694)15. Dezember 1988 & JP-A-63 198 309 ( HITACHI LTD. ) 17. August 1988
  • [A] ELECTRONIC DESIGN Bd. 27, Nr. 3, 1. März 1979, USA Seiten 86 - 89 T.A.O. GROSS 'Multistrand Litz wire adds "skin" to cut AC losses in switching power supplies.'
  • [A] ELECTRONICS APPLICATIONS BULLETIN Bd. 35, Nr. 3, Mai 1978, NETHERLANDS Seiten 146 - 163 J. JONGSMA 'Minimum-loss transformer windings for ultrasonic frequencies.'

Designated contracting state (EPC)

CH DE ES FR GB IT LI SE

DOCDB simple family (publication)

EP 0561208 A2 19930922; EP 0561208 A3 19931013; EP 0561208 B1 19970528; DE 4208250 A1 19930916; DE 59306550 D1 19970703; ES 2101890 T3 19970716; US 5430273 A 19950704

DOCDB simple family (application)

EP 93103274 A 19930302; DE 4208250 A 19920314; DE 59306550 T 19930302; ES 93103274 T 19930302; US 3067793 A 19930312