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. 07, 1992
Filed:
Aug. 30, 1990
Applicant:
Inventors:
Hiroaki Fujimoto, Hamamatsu, JP;
Seiji Inoue, Hamamatsu, JP;
Assignee:
Sanshin Kogyo Kabushiki Kaisha, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
123 / ; 60312 ;
Abstract
An exhaust silencing system for a two-cycle ported engine including an expansion chamber that communicates with the cylinder through a communication port that is opened before the exhaust port of the engine is opened so as to permit the exhaust gases to expand and reduce the noise of the engine. The communication port is either fully opened before the exhaust port is initially opened so as to achieve maximum silencing and/or is fully closed before the exhaust port is fully closed so as to avoid loss of effective compression pressure.