Patent · US Expired

Hand-guided machine tool comprising a radial blower

US5315193A · kind A · utility

27Cited by

12References

17Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Martin E. Kummer · Auburn, US
Werner Rieker · Waldenbuch, DE
Eckerhard Strotgen · Waldenbuch, DE
Eberhard Prahst · Esslingen am Neckar, DE

Key dates

Filing date	Jul 15, 1992
Grant date	May 24, 1994
Priority date	—
Expiry date	Jul 15, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH02K9/06
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hand-guidable electric machine tool has a casing having an air guide duct, a tool part, a motor for driving the tool part, and a radial blower for cooling the motor, the radial blower having a fan wheel for forming a static pressure differential. The air guide duct has an inlet opening and an outlet opening and continuously widening in cross-section in a direction of the outlet opening. The cross-section measured in radial direction of the inlet opening of the air guide duct is smaller than the cross-section of the outlet opening.

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