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:
May. 22, 1979
Yuichi Tobita, Katsuta, JP;
Masamitsu Okumura, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel vapor trapping device for trapping the fuel vapors evaporated in a fuel feed system such as a float chamber of a carburetor and a fuel tank of an internal combustion engine, said device comprising a first canister whose one end is communicated with the float chamber and the high suction in the carburetor and whose the other end is communicated with the surrounding atmosphere and which is filled with a first absorbent capable of absorbing the vapors of hydrocarbons having carbon numbers up to and including seven (C.sub.7), and a second canister whose one end is communicated with the fuel tank and with the high suction in the carburetor and whose the other end is communicated with the surrounding atmosphere and which is filled with a second absorbent capable of absorbing the vapors of hydrocarbons having the carbon numbers up to and including four (C.sub.4). A single canister type is also disclosed wherein the first and second canisters are constructed as a unitary assembly.