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. 22, 2003
Filed:
Apr. 23, 2002
Gerhard Osburg, Stetten, DE;
Wolfgang Luithardt, Waiblingen, DE;
Peter Schmidt, Waiblingen, DE;
Reinhard Gerhardy, Korb, DE;
Andreas Stihl AG & Co., Waiblingen, DE;
Abstract
A membrane carburetor for an internal combustion engine in a portable handheld work apparatus includes a control chamber ( ) delimited by a membrane ( ). The control chamber ( ) is connected via a feed line ( ) to a fuel tank ( ). The feed line ( ) is cleared via a valve body ( ) when there is a deflection of the membrane ( ) because of an underpressure in the control chamber ( ). The control chamber ( ) is connected to an air channel ( ) via at least one fuel nozzle ( ) and at least one ancillary chamber ( ). The air channel ( ) passes through the membrane carburetor ( ) and leads to the internal combustion engine. A purge pump ( ) is provided in a fuel line ( ) connecting the control chamber ( ) to the fuel tank ( ). The fuel path between the control chamber ( ) and the purge pump ( ) is guided through at least one ancillary chamber ( ).