Patent · US Expired

Portable hand-guided work apparatus

US6880515B2 · kind B2 · utility

3Cited by

6References

17Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Werner Geyer · Newton, US
Claus Fleig · Asperg, DE
Bernd Knodler · Winnenden, DE
Jorg Schlossarczyk · Winnenden, DE

Key dates

Filing date	Mar 12, 2003
Grant date	Apr 19, 2005
Priority date	—
Expiry date	Mar 12, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B2075/025
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A portable hand-guided work apparatus (1), such as a motor-driven chain saw, cutoff machine or the like, includes an internal combustion engine (2) and an air filter (10). At least one air channel (8) and an intake channel (7) are provided which fluidly connect the internal combustion engine (2) to the clean side of the air filter (10). The intake channel (7) is configured at least partially in a carburetor (9). The air channel (8) opens at an air channel opening (13, 13′, 13″) and the intake channel (7) opens at an intake opening (12) at the clean side of the air filter (10). Air channel opening (13, 13′, 13″) and intake opening (12) open spatially separate from each other at the clean side of the air filter (10). To prevent the entry of fuel into the air channel (8) from the intake channel (7), the intake opening (12) in the normal work position of the work apparatus (1), seen in the effective direction (17) of the gravity force, has an elevation offset (a, a′, a″) relative to the air channel opening (13, 13′, 13″).

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