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US 5,066,437 AGranted
Method for insulating thermal devices
OwnerRobert W. Barito, Mary O. Baritoinventors
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Abstract
A method for insulating thermal devices with a composite insulation system including an evacuated powder and a plastic foam. A formed plastic part divides the insulation space between the outer case and inner liner into sectors. Some sectors are filled with a finely divided powder, the remaining sectors are filled with foam, for example, polyurethane. A vacuum is applied to the powder filled sectors while the foam is expanding and curing.
Claims2
A method of insulating thermal devices with a composite insulation system bounded by spaced walls comprising the following steps:
- dividing the spaced walls of the thermal device into two sectors,
- filling one of the two sectors through a fill port with a powder,
- sealing the powder fill port,
- filling the other sector with a plastic foamable material,
- applying vacuum to the powder filled sector, through an evacuation port, while the plastic foamable material is expanding and curing, and
- sealing the evacuation port while maintaining the vacuum.
3 more elements
Dependencies are inferred from the claim text.