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. 09, 2002
Filed:
Mar. 01, 2001
Heiko Rosskamp, Adelberg, DE;
Axel Klimmek, Schwaikheim, DE;
Peter Linsbauer, Remshalden, DE;
Lars Bergmann, Welzheim, DE;
Andreas Stihl AG & Co., Waiblingen, DE;
Abstract
A two-stroke engine for a portable two-stroke engine in a portable handheld work apparatus includes a combustion chamber ( ) formed in a cylinder ( ). The combustion chamber ( ) is delimited by the piston ( ) which drives the crankshaft ( ) via a connecting rod ( ). The two-stroke engine includes several transfer channels ( ), which, referred to a symmetry plane ( ), lie on opposite sides ( ) with the plane partitioning approximately the outlet ( ). The transfer channels ( ) connect the crankcase ( ) to the combustion chamber ( ). A first end ( ) of each transfer channel ( ) opens via an entry window ( ) into the combustion chamber ( ) and the second end ( ) of each transfer channel opens to the crankcase ( ). Each transfer channel ( ) is connected, between its ends ( ), to an air channel ( ) via a membrane valve ( ). Air is supplied by the air channel ( ) via an adjustable throttle ( ).