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:
Aug. 25, 1981
Filed:
Jul. 27, 1979
Applicant:
Inventor:
Toshimitsu Iio, Hamamatsu, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123323 ; 123 / ; 123 / ; 123 / ; 188273 ;
Abstract
Two stroke engine having an exhaust port provided with a rotary type timing control valve at the upper portion thereof. The control valve is connected with a centrifugal actuator which is responsive to the engine speed so that the exhaust port is wide open under a high speed engine operation but covered at the upper portion by said control valve under a low speed operation to change the exhaust port timing.