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. 17, 2018
Filed:
Nov. 27, 2009
Karsten Schmidt, Fellbach, DE;
Andreas Hägele, Berglen, DE;
Karsten Schmidt, Fellbach, DE;
Andreas Hägele, Berglen, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
The invention relates to a fuel-metering arrangement for the mixture-forming unit () of an internal combustion engine () in a portable handheld work apparatus. The mixture-forming unit comprises a fuel store (), a switchable valve () and a fuel channel () which opens into an intake region of the engine (). The valve () has an inflow port () which is connected to the fuel store () and an outflow port () which is connected to the fuel channel (). A fuel column is mechanically moved by the switching of the valve. In order to compensate for this fuel column, the outflow port () is connected via a bypass channel () to the inflow port () and a flow valve () is mounted in the bypass channel (). The flow valve () opens in flow direction () from the outflow port () to the inflow port () and blocks in the direction opposite thereto.