The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 2000
Filed:
Nov. 20, 1996
Ulrich Demuth, Erbach-Ernsbach, DE;
Winrich Habedank, Diez, DE;
Black & Decker Inc., Newark, DE (US);
Abstract
A rotary hammer with a tool holder and a hammer mechanism for the transmission of impact energy onto the drilling and/or chiselling bit in the tool holder has a switching device which with a single actuator makes it possible to switch between pure drilling operation, rotary hammering operation and pure hammering operation. The switching device acts on a coupling with which the hammer mechanism is couplable with a rotatingly driven intermediate shaft, and has a slide part for shifting a toothed wheel between a first position for the rotary driving of the tool holder and a second position in which no rotary driving of the tool holder takes place. The coupling for the hammer mechanism can be separated by a cam part coupled in untwistable manner with the actuator. The actuator extends through an opening of the recess in the slide part and has a cam section which, in one position, keeps the slide part in the second position, while, in the other positions of the actuator, the slide part is located in the first position. The cam part is provided at the section of the actuator projecting inwardly over the slide part.