Fan arrangement of a portable handheld work apparatus driven...

Details Fan arrangement of a portable handheld work apparatus driven... Fan arrangement of a portable handheld work apparatus driven...

2005-09-27

2005-09-27

Dolinar, Andrew M. (Department: 3747)

Internal-combustion engines

Cooling

Air-cooled

C123S041700, C055S437000

Reexamination Certificate

active

06948457

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).

REFERENCES:
patent: 5231956 (1993-08-01), Lux et al.
patent: 5367988 (1994-11-01), Collins

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