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. 16, 1991
Filed:
Oct. 11, 1989
Applicant:
Inventor:
Kei Mori, Kaminoge, Setagaya-ku, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F17C / ;
U.S. Cl.
CPC ...
62 531 ; 521696 ; 109 / ; 62260 ; 165 45 ;
Abstract
A disaster prevention system for underground spaces has a compressed air supply system and an independent power generator installed in an underground space. In the event of a disaster, the compressed air supply system discharges compressed air into an underground space in order to maintain the air pressure therein at a higher level than that of the external atmosphere. The independent power generator generates electrical energy which provides the necessary lighting for the underground space.