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(11)    Patent No :    AP 2686   
(21)    Application No :    AP/P/2009/004745   
(22)    Filing Date :    17.07.2007   
(24)    Date of Grant &    27.06.2013   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
FR    0606647    21.07.2006

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
(73) Applicant(s)
MDI - MOTOR DEVELOPMENT INTERNATIONAL S.A., 23 rue Beaumont, L -1219,
Luxembourg
(72) Inventors

NEGRE Guy, France

NEGRE Cyril, France

(74) Representative

HONEY & BLANCKENBERG

(51)  International  Classification   F01B 17/02 (2006.01)    F02G 1/04 (2006.01)
F01K 25/08 (2006.01)   
(54)    Title

Ambient temperature thermal energy and constant pressure cryogenic engine

(57)    Abstract

Ambient temperature thermal energy cryogenic engine with constant pressure

with continuous "cold" combustion at constant pressure and with an active chamber operating with a cryogenic fluid (A2) stored in its liquid phase, and used as a work gas in it s gaseous phase and operating in a closed cycle with return to its liquid phase. The initially liquid cryogenic fluid is vaporized in

the

gaseous phase at very low temperatures and supplies the inlet (A4) of a gas compression device (B), which then discharges this compressed work gas, still at low temperature, and through a heat exchanger with the ambient temperature (C), into work tank or external expansion chamber (19) fitted or

not fitted with a heating device, where its temperature and its volu me will considerably increase in order to then be preferably let into a relief device

(D)

(56)    Documents Cited :    FR-2814530 A    EP -1271075 A    FR-2862349  A1

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