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. 06, 2013
Filed:
Aug. 12, 2009
Toshinori Yasutomi, Ibaraki, JP;
Shinki Ohtsu, Ibaraki, JP;
Junichi Kamimura, Ibaraki, JP;
Shigetoshi Ishida, Ibaraki, JP;
Toshinori Yasutomi, Ibaraki, JP;
Shinki Ohtsu, Ibaraki, JP;
Junichi Kamimura, Ibaraki, JP;
Shigetoshi Ishida, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
The invention provides a two cycle engine which effectively suppresses an intrusion of a combustion gas into a crank chamber. Further, the invention provides a two cycle engine tool provided with the two cycle engine mentioned above. An engine is provided with a cylinder having two scavenge air ports at different positions in a cylinder circumference direction, and scavenge air inflow ports communicating individually with these two scavenge air ports via a scavenge air passage, and a piston in which two scavenge air communication ports are formed at positions corresponding to the scavenge air inflow ports, and is structured to swirl the gas flowing into the piston from the cylinder through the scavenge air passage, in an upper portion of the internal space of the piston, and retains the gas in the upper portion of the internal space of the piston.