Fan arrangement
First Claim
1. A fan arrangement of an internal combustion engine including an engine of a portable handheld work apparatus, the fan arrangement comprising:
- a fan wheel for acting on air to move said air in an air flow defining a flow direction (S);
a fan housing at least partially surrounding said fan wheel;
a take-out opening disposed in the region of said air flow to branch off a component of said air flow as a combustion air flow for said internal combustion engine;
said take-out opening being disposed outside of said fan wheel in radial direction;
said take-out opening being configured as a window having a forward edge viewed in said flow direction (S) and said forward edge having a small width (b); and
, said window having a rearward edge and said window having a width and a depth which both increase toward said rearward edge.
1 Assignment
0 Petitions
Accused Products
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.
12 Citations
16 Claims
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1. A fan arrangement of an internal combustion engine including an engine of a portable handheld work apparatus, the fan arrangement comprising:
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a fan wheel for acting on air to move said air in an air flow defining a flow direction (S);
a fan housing at least partially surrounding said fan wheel;
a take-out opening disposed in the region of said air flow to branch off a component of said air flow as a combustion air flow for said internal combustion engine;
said take-out opening being disposed outside of said fan wheel in radial direction;
said take-out opening being configured as a window having a forward edge viewed in said flow direction (S) and said forward edge having a small width (b); and
,said window having a rearward edge and said window having a width and a depth which both increase toward said rearward edge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification