Patent · US Active

Power tool

US9175594B2 · kind B2 · utility

0Cited by

18References

22Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Thorsten Schäffer · Pforzheim, DE
Wolfgang Layher · Besigheim, DE
Christopher Tost · Auenwald, DE
Arno Kinnen · Fellbach, DE
Igor Klaric · Bad Marienberg, DE

Key dates

Filing date	Dec 7, 2012
Grant date	Nov 3, 2015
Priority date	—
Expiry date	Dec 7, 2032

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B63/02
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A power tool has an internal combustion engine with a cylinder. An injection valve supplies fuel to the internal combustion engine. A fuel pump conveys fuel from a fuel tank to the injection valve. A fan wheel is provided that is driven by the internal combustion engine. The cylinder is arranged in a first cooling zone of the power tool and the fan wheel conveys cooling air through the first cooling zone. The fuel pump is arranged in a second cooling zone of the power tool. Between the first cooling zone and the second cooling zone a buffer zone is arranged. The buffer zone is separated by at least one first partition from the first cooling zone and by at least one second petition from the second cooling zone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.