Fan arrangement of a portable handheld work apparatus driven by an internal combustion engine
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;
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;
an aerodynamically formed guide ramp disposed outside of said fan wheel in radial direction;
said guide ramp rising in axial direction; and
, said take-out opening being disposed downstream of said guide ramp.
1 Assignment
0 Petitions
Accused Products
Abstract
A fan arrangement of a portable handheld work apparatus is driven by an internal combustion engine and includes a radial fan (1) which includes a fan wheel (5) and a spirally-shaped fan housing (6) which encloses the fan wheel (5) at least partially. A take-out opening (3) is provided in the radial fan (1) in the region of the moved air flow (2) for diverting a combustion air flow (4) for the engine. The combustion air flow (4) is branched off from the air flow (2). In the radial direction outside of the fan wheel (5), there is an aerodynamically formed guide ramp (7) provided in the air flow (2) which rises in the axial direction. The take-out opening (3) is arranged downstream of the guide ramp (7).
4 Citations
14 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;
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;
an aerodynamically formed guide ramp disposed outside of said fan wheel in radial direction;
said guide ramp rising in axial direction; and
,said take-out opening being disposed downstream of said guide ramp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification