Patent · US Expired

Machine tool with a chamber for lubricant agent and a pressure equalization device for said chamber

US6722449B2 · kind B2 · utility

10Cited by

12References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Helmut Lebisch · Erlangen, DE
Otto Baumann · Echterdingen, DE
Rolf Mueller · Echterdingen, DE
Dietmar Saur · Lingen (Ems), DE

Key dates

Filing date	Jul 31, 2002
Grant date	Apr 20, 2004
Priority date	—
Expiry date	Oct 9, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/185
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A machine tool, in particular to a hand-operated hammer drill, having a compartment containing lubricant and a device for compensation of the pressure in the compartment in the area of a bearing of a component able to be driven so as to allow rotation. It is proposed that the bearing form at least a part of a lubricant seal of the pressure-compensation device via which a pressure in the compartment as able to be compensated.

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