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. 22, 2002
Filed:
Oct. 20, 1999
Applicant:
Inventors:
Yasuhide Furusawa, Lebanon, KY (US);
Daiichiro Kawashima, Ichinomiya, JP;
Hiroshi Mukai, Hashima, JP;
Assignee:
Toyoda Gosei Co., Ltd., Aichi-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60H 1/24 ;
U.S. Cl.
CPC ...
B60H 1/24 ;
Abstract
An exhaust ventilator has a frame on which an opening is formed. The frame is composed of a main frame and a flange. Partitions divide the opening of the frame into a plurality of air vents in a matrix manner. Butterfly valves of plate shape have their upper end fixed to the partitions. Lower portions of the butterfly valves are able to open and close the air vents. The frame, partitions and butterfly valves are made of the same olefinic material. Thus, they can be recycled without disassembling.