Thermal insulation

DETAILED DESCRIPTION It is, therefore, an object of the invention to provide thermal insulation of the type mentioned at the outset which has a lower thermal conductivity than the insulations known to date, and the dimensions and structural volume of which are kept very small.
The thermal insulation should, furthermore, be designed so that support elements in the cavity of the insulation and additional stiffeners of the outer walls may be dispensed with.
With the foregoing and other objects in view, there is provided in accordance with the invention a thermal insulation comprising at least one closed-off cavity containing insulating material with said cavity having at most a residual pressure of 1 to 10 mbar and filled with at least one fine-grain powdered insulating material with high porosity.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in thermal insulation, it is nevertheless not intended to be limited to the details shown, since various modifications may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.