Motor-driven work apparatus

Details Motor-driven work apparatus Motor-driven work apparatus

1992-06-19

1992-12-08

Kamen, Noah P.

Internal-combustion engines

Cooling

With jacketed head and/or cylinder

123 4165, F01P 102

Patent

active

051688379

ABSTRACT:
The invention is directed to a work apparatus having a fan wheel driven by a motor mounted in a housing. A fan cover covers the fan wheel and defines a plurality of air-inlet openings arranged in a grid-like pattern forward of the fan wheel through which a first component flow of cooling air passes to the fan wheel. The fan cover has an inside wall surface and a collar formed on the inside wall surface. An air-conducting wall is mounted on the inside wall surface and defines cooling channels communicating with the space within the collar for conducting a second component flow of cooling air to the fan wheel. The fan cover and the collar together with the air-conducting wall conjointly define a single unitary piece devoid of any fasteners which are separate from the fan cover, collar and air-conducting wall.

REFERENCES:
patent: 4970993 (1990-11-01), Weiss et al.

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