Patent · US Expired

Motor cooling means for a vacuum/blower device

US6116864A · kind A · utility

11Cited by

3References

7Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Norbert Veser · Waiblingen, DE
Georg Becker · Schwaikheim, DE
Thomas Elsner · Düsseldorf, DE

Key dates

Filing date	Jan 15, 1998
Grant date	Sep 12, 2000
Priority date	—
Expiry date	Jan 15, 2018

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B2075/025
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.