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:
Jun. 24, 2003
Filed:
Jan. 29, 2002
Heinz Hettmann, Schorndorf, DE;
Andreas Stihl AG & Co., , DE;
Abstract
An internal combustion engine, especially a two-stroke engine in manually-guided implement, is provided. A piston that is disposed in a cylinder delimits a combustion chamber and by means of a connecting rod drives a crankshaft disposed in a crankcase. A fuel/air mixture is supplied to the engine via a diaphragm carburetor, the control chamber of which is delimited by a control diaphragm that controls a feed valve. Formed on the dry side of the diaphragm is a compensation chamber that communicates via a flow path with a source of pressure that pulsates as a function of engine speed. Disposed in the flow path is a check valve. The compensation chamber is to be relieved by a pressure-regulating valve disposed in a further flow path.