Patent · US Active

Hand-held power tool for percussively driven tool attachments

US8292002B2 · kind B2 · utility

14Cited by

11References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Otto Baumann · Echterdingen, DE
Hardy Schmid · Stuttgart, DE
Tobias Herr · Stuttgart, DE

Key dates

Filing date	Nov 18, 2008
Grant date	Oct 23, 2012
Priority date	—
Expiry date	Jun 27, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/175
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a hand-held power tool for predominantly percussively driven tool attachments, in particular hammer drills and/or a chisel-action hammers. The power tool has a percussion axis and an intermediate shaft that is parallel to the percussion axis and which has a first stroke generating device having a first stroke element for a percussion drive. Additionally, at least one additional second stroke generating device having at least one second stroke element is provided for driving a counter oscillator that is arranged on or about the intermediate shaft and can be driven by the intermediate shaft. A phase displacement that is different from zero and that is unequal to 180° takes place between a movement of the first stroke element and a movement of at least one second stroke element.

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