Black Decker Inc.

Winrich Habedank

Klaus-Dieter Arich

Ulrich Demuth

A battery-powered hand-guided power tool is provided, such as a hammer, includes a tool housing that contains an electric motor M, a grip housing and a rail-and-channel structure for releasable mounting of a rechargeable battery pack . The battery pack is locked in an operative position on the housing in which electrical contacts ( ) of the battery pack and associated electrical contacts of the tool housing are electrically connected along a contact length extending in a longitudinal direction of the rail-and-channel arrangement. A latch structure located on the tool housing is movable between a latched position and a release position. When the latch structure is moved from the latched position into the release position, the battery pack can be moved in the direction of the longitudinal extent of the rail-and-channel structure out of the operative position and can be removed from the tool housing . Between the battery pack and the tool housing there is arranged a spring which loads the inserted battery pack in a direction of a displacement movement out of the operative position. The distance of travel of the spring is greater than the contact length of the contacts and the restoring force of the spring at the contact length is greater than the weight of the battery pack

Battery-powered hand-guided power tool

A battery-powered hand-guided power tool is provided, such as a hammer, includes a tool housing,that contains an electric motor M, a grip housing,and a rail-and-channel structure,for releasable mounting of a rechargeable battery pack,The battery pack,is locked in an operative position on the housing,in which electrical contacts (,) of the battery pack,and associated electrical contacts,of the tool housing are electrically connected along a contact length extending in a longitudinal direction of the rail-and-channel arrangement. A latch structure,located on the tool housing,is movable between a latched position and a release position. When the latch structure,is moved from the latched position into the release position, the battery pack,can be moved in the direction of the longitudinal extent of the rail-and-channel structure,out of the operative position and can be removed from the tool housing 3. Between the battery pack,and the tool housing,there is arranged a spring,which loads the inserted battery pack,in a direction of a displacement movement out of the operative position. The distance of travel of the spring,is greater than the contact length of the contacts,and the restoring force of the spring,at the contact length is greater than the weight of the battery pack

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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Diez, Germany

Winrich Habedank