Patent · US Active

Machine tool having an electric drive motor

US8584771B2 · kind B2 · utility

2Cited by

38References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rainer Vollmer · Bad Liebenzell, DE
Marcus Schuller · Waldenbuch, DE

Key dates

Filing date	Mar 13, 2009
Grant date	Nov 19, 2013
Priority date	—
Expiry date	Mar 13, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25F5/008
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A machine tool, in particular a powered hand tool, has an electric drive motor to which pole shoes are assigned in order to conduct a magnetic field. Furthermore, a fan wheel is provided in order to produce a stream of cooling air. In the housing, an air-guiding element forms a portion of the flow path for the stream of cooling air. According to the invention, the air-guiding element at least partially covers the pole shoes.

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