(19)
(11) EP 2 938 882 A1

(12)

(43) Date of publication:
04.11.2015 Bulletin 2015/45

(21) Application number: 13866835.5

(22) Date of filing: 03.01.2013
(51) International Patent Classification (IPC): 
F04D 1/06(2006.01)
(86) International application number:
PCT/US2013/020065
(87) International publication number:
WO 2014/105099 (03.07.2014 Gazette 2014/27)
(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

(30) Priority: 27.12.2012 US 201213728250

(71) Applicant: Graf, Ronald E.
Greensboro, NC 27410 (US)

(72) Inventor:
  • Graf, Ronald E.
    Greensboro, NC 27410 (US)

(74) Representative: Tomkinson, Alexandra 
Bailey Walsh & Co LLP 1 York Place
Leeds, LS1 2DR
Leeds, LS1 2DR (GB)

   


(54) CENTRIFUGAL EXPANDERS AND COMPRESSORS EACH WITH BOTH FLOW FROM PERIPHERY TO CENTER AND FLOW FROM CENTER TO PERIPHERY IN BOTH EXTERNAL HEAT AND INTERNAL COMBUSTION