Patent · US Expired

Power-driven hand tool

US4456076A · kind A · utility

20Cited by

14References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Schmid · Regensburg, DE
Karl Wanner · Echterdingen, DE
Jorg Falchle · Neckartenzlingen, DE
Manfred Bleicher
Frank Müller · Birkenfeld, DE

Key dates

Filing date	Jun 30, 1981
Grant date	Jun 26, 1984
Priority date	—
Expiry date	Jun 30, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/18336
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hammer drill has a housing provided with a tool chuck in which a tool is to be mounted. A drive is provided which is capable of rotating and/or axially impacting the tool chuck. This drive includes a piston reciprocable in axial direction of the tool chuck, a drum rotating on a shaft extending parallel to the direction of reciprocation of the piston and provided with a circumferentially extending cam track, and a transmitting arrangement which travels in part in engagement with the cam track and which has another part connected with the piston to reciprocate the same.

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