Motor cooling means for a vacuum/blower device

Details Motor cooling means for a vacuum/blower device Motor cooling means for a vacuum/blower device

1998-01-15

2000-09-12

Freay, Charles G.

Pumps

Motor driven

Internal-combustion engine

417366, 417368, F04B 1700

Patent

active

061168645

ABSTRACT:
A hand-held vacuum/blower device has a housing with an interior and a drive motor arranged in the interior. The drive motor has a drive shaft. A blower spiral is connected to the housing. The blower spiral has a first and a second radial end faces and each one of the radial end faces has at least one air inlet opening. A blower wheel is arranged in the blower spiral and coupled to the drive shaft. A venting wheel is coupled to the drive shaft for conveying cooling air from the exterior of the housing to the drive motor in the interior of the housing. The blower wheel has a hub and a wall connected to the hub and extending to the periphery of the blower wheel. The wall has a first end face facing the first radial end face and a second end face facing the second radial end face. The blower wheel includes first and second vanes wherein the first vanes are connected to the first end face of the wall and the second vanes are connected to the second end face of the wall. The first radial end face is part of the housing and the air inlet opening of the first radial end face connects the interior of the housing to the suction area of the blower wheel.

REFERENCES:
patent: 4527960 (1985-07-01), DeSisto
patent: 4918781 (1990-04-01), Sovis et al.
patent: 5269665 (1993-12-01), Sadler et al.

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