(19)
(11) EP 3 808 153 A1

(12)

(43) Date of publication:
21.04.2021 Bulletin 2021/16

(21) Application number: 19823176.3

(22) Date of filing: 07.05.2019
(51) International Patent Classification (IPC): 
H05B 6/02(2006.01)
H05B 6/06(2006.01)
 H05B 6/04(2006.01)
H05B 6/10(2006.01)
(86) International application number:
PCT/US2019/031128
(87) International publication number:
WO 2019/245663 (26.12.2019 Gazette 2019/52)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 18.06.2018 US 201816010877

(71) Applicant: Ultraflex International, Inc.
Ronkonkoma, NY 11779 (US)

(72) Inventors:
  • SCHMITT, Philip, Charles
    Columbus, OH 43235 (US)
  • METODIEV, Mario
    NY 11795 (US)
  • BONEV BONEV, Stanimir
    5300 Dimitrovgrad, Bulgaria (BG)

(74) Representative: V.O. 
P.O. Box 87930
2508 DH Den Haag
2508 DH Den Haag (NL)

   


(54) RADIO FREQUENCY HEATING APPARATUS USING DIRECT-DIGITAL RADIO FREQUENCY POWER CONTROL AND FINE-TUNE POWER CONTROL