(19)
(11) EP 1 477 752 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.06.2005 Bulletin 2005/23

(43) Date of publication A2:
17.11.2004 Bulletin 2004/47

(21) Application number: 04252790.3

(22) Date of filing: 13.05.2004
(51) International Patent Classification (IPC)7: F25D 23/06, F25D 3/10, F16L 59/06
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 14.05.2003 US 437655

(71) Applicant: Chart Inc.
Burnsville, MN 55306-3803 (US)

(72) Inventor:
  • Brooks, Jeff
    Burnsville, MN 55306-3803 (US)

(74) Representative: Parkinson, Neil Scott et al
Marks & Clerk, 83-85 Mosley Street, Sussex House
Manchester M2 3LG
Manchester M2 3LG (GB)

   


(54) Improved cryogenic freezer


(57) A rectangular double walled cryogenic freezer (10,110) has a vacuum space (16,116) filled with alternating layers of flexible insulating material (20,120) and a reflective material (18,118). A support structure (22,122) is also positioned in the vacuum space (16,116). The support structure (22,122) is open-celled and provides structural support for the freezer walls to prevent wall deformation when a vacuum is drawn. The support structure (22,122) may be open-cell rigid foam (122) or a support grid (22) sandwiched between two layers of rigid insulation material (26a,26b).






Search report