The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1982
Filed:
Feb. 15, 1980
Suminobu Iwabuchi, Takatsuki, JP;
Kazumasa Matsui, Takatsuki, JP;
Yuasa Battery Company Limited, Osaka, JP;
Abstract
The invention relates to multilayer heat insulators wherein gas-impermeable layers each made of a metal foil of one member selected from the group consisting of aluminum, nickel and stainless steel and gas-containing layers each made of at least one member selected from the group consisting of glass fiber, asbestos fiber, mineral fiber, ceramic fiber, carbon fiber, silica powder, alumina powder and zirconia powder in the form of wool, paper or mat are laminated alternately so that the same layers do not contact each other. The thickness of the gas-impermeable layer is 10 to 20 .mu.m, the thickness of the gas-containing layer is 0.3 to 1.8 mm and its porosity is 0.98 to 0.95 to make the thermal conductivity of this laminated multilayer heat insulator about 0.02 kcal/mh.degree. C. (200.degree. C.) so that the behavior of the contained gas may be as small as possible, the thermal conduction may be prevented and the heat insulating performance may be improved.