Tool driving or impacting – Drive adjustable to completely change kind of drive – Adjustable to impacting device
Patent
1996-11-20
2000-08-29
Martin-Wallace, Valencia
Tool driving or impacting
Drive adjustable to completely change kind of drive
Adjustable to impacting device
E02D 702
Patent
active
061093645
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.
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Demuth Ulrich
Habedank Winrich
Black & Decker Inc.
Del Ponti John D.
Martin-Wallace Valencia
Paradiso John
Shapiro Bruce S.
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