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:
Jul. 21, 1981
Filed:
Mar. 06, 1979
Yasuhiko Nakamura, Toyohashi, JP;
Yoshio Yamakawa, Toyota, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
Air cleaning means suitable for use with an internal combustion engine including a fuel vapor adsorbing filter element and a sucked air cleaning filter element arranged independently of and separately from each other. The fuel vapor adsorbing filter element includes a filter material layer containing fibers of active carbon for adsorbing fuel vapors thereon, and a metallic reinforcing member, while a sucked air cleaning filter element includes a filter material layer of the usual type for cleaning the air drawn by suction into a combustion chamber of the internal combustion engine. The fuel vapor adsorbing filter element may further include a plurality of reinforcing layers of nonwoven fabric each located on one of opposite sides of the filter material layer. The filter material layer and the reinforcing layers of nonwoven fabric may be formed with a plurality of apertures extending therethrough, and an additional layer of nonwoven fabric may be mounted between the metallic reinforcing member and one of the plurality of reinforcing members of nonwoven fabric which is located inside the filter material layer.