Patent · US Expired

Multi-speed transmission for electrical power tools

US6093130A · kind A · utility

15Cited by

10References

17Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Manfred Buck · Jeffery Road, DE
Siegfried Fehrle · Echterdingen, DE
Juergen Schmidt · Rottenburg am Neckar, DE

Key dates

Filing date	Apr 21, 1998
Grant date	Jul 25, 2000
Priority date	—
Expiry date	Apr 21, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/65
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A multi-speed transmission for electrical power tools with a rotatable tool has a machine housing, a working spindle supported in the housing for rotating the tool, an electric motor, a gear reducer shaft which is driven by the electric motor, a planetary transmission arranged between the working spindle and the gear reducer shaft, the planetary transmission including a sun gear, planetary gears and a planetary gear carrier, the planetary gear carrier being coupled with the gear reducer shaft, the sun gear being formed switchably so that it is coupled for joint rotation with the machine housing for a slower speed and with the working spindle for a faster speed.

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