Heavy gas-filled multilayer insulation panels
US4808457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1986 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Aug 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24661
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A self-contained thermal insulation panel, of generally flat rectangular form suitable for placement within the walls or doors or a refrigeration cabinet, consists of a hermetically sealed envelope surrounding an assembled framework defining a plurality of thin parallel internal cavities. The cavities are formed by a plurality of thin stretched-out sheets, each preferably with at least one reflective face, spaced-apart by thin interlocking peripheral gaskets between a top and a bottom frame member. A method of manufacturing an insulation panel according to this invention requires the initial assembly, on a first frame member, of an alternating array of thin sheets and gaskets, then a final sheet and a second frame member all brought firmly together and permanently affixed as a unified assembly. The assembled structure is then evacuated and refilled with a heavier-than-air gas or low thermal conductivity, e.g., a halogenated methane or ethane, and sealed into an outer envelope closely surrounding the frame structure which thereby defines the panel shape. In yet another embodiment, gas-filled bubbles formed on one side of each sheet space it from the adjacent sheet, without a framewo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.