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:
Oct. 01, 1991
Filed:
Oct. 11, 1990
Applicant:
Inventors:
Masaharu Hama, Itami, JP;
Takaaki Fukumoto, Itami, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55270 ; 55309 ; 55316 ; 553852 ; 98 315 ;
Abstract
An air conditioning apparatus for a clean room has a filter for removing harmful chemicals provided in the return opening of an air-conditioner. In normal operation where there is no chemical leakage, circulating air in the clean room by-passes the filter. When chemicals and the like leak, the circulating air is caused to pass through the filter by operating shutters in order to remove the chemical mist and the like contained in the circulating air.