Fan arrangement

Details Fan arrangement Fan arrangement

2005-03-22

2005-03-22

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

C055S438000, C055S473000, C055SDIG001, C055SDIG002

Reexamination Certificate

active

06868821

ABSTRACT:
A fan arrangement of an internal combustion engine, especially of a portable handheld work apparatus, includes a fan wheel (5) and a spirally-shaped fan housing at least partially enclosing the fan wheel. A take-out opening (13) is provided in the fan arrangement at the region of the moved air flow for diverting a combustion air flow for the engine. The combustion air flow is branched-off from the air flow. The take-out opening (13) is arranged in radial direction directly outside of the fan wheel (5) and is so configured that the take-out opening (13) defines a window (14) which, referred to the flow direction (S), has a small width at a forward edge and that the width as well as the depth of the window (14) increases to a rearward edge.

REFERENCES:
patent: 5438965 (1995-08-01), Aronsson et al.
patent: 5720243 (1998-02-01), Stegemyr et al.
patent: 36 04 166 (1986-03-01), None

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