Black & Decker Corporation

Balck & Decker Inc.

Michael Stirm

Norbert Hahn

Heinz-Werner Faatz

Reimund Becht

Achim Buchholz

Ernst Staas

Ralf Bernhart

Robert Bradus

Robert Alan Usselman

Stefan D Gensmann

Michael G Kunz

Horst Grossmann

Tobias Heep

Rainer Herting

Frantisek Harcar

Martin Lauterwald

Ralf Seebauer

Bruno Meinholf Ruethers

Achim Jung

Daniel Craven

Alfred Fordon

A mounting assembly for moveably mounting a handle of a power tool to a housing of the power tool is disclosed. The mounting assembly has a metal bar () mounted to a housing () of the power tool and a vibration damper () mounted to a handle () of the power tool and slidably mounted to the metal bar. The vibration damper includes a vibration damping member () for damping vibrations tending to cause the vibration damper to pivot relative to the metal bar about an axis substantially parallel to the longitudinal axis of the metal bar.

Mounting assembly for handle for power tool

A switch assembly for a power tool including a switch member and a fixing part. The switch member including a finger grip part, a retaining part for retaining the switch member on a power tool, and an opening extending at least partially through the switch member, the retaining part arranged to project laterally with respect to an axis of the opening. The fixing part is arranged to be located in the opening. The switch assembly is arranged such that when the fixing part is at a first location in the opening, the retaining part adopts a retention configuration in which it projects laterally to a predetermined extent. When the fixing part is removed or at a second location in the opening, the retaining part adopts an insertion configuration in which it does not project laterally or projects less than the predetermined extent.

Switch assembly for a power tool

A hammer drill having an outer housing defining a handle is disclosed. The tool includes transmission housing including a drive mechanism and a motor, wherein the transmission housing is moveably mounted in the outer housing by arms for movement relative to the outer housing along a non-linear path between a first position, corresponding to no force being applied by a user to the outer housing of the tool, and a second position, corresponding to the user applying a force to the outer housing when the working member of the tool engages a workpiece. Springs bias the transmission housing towards the first position. The direction of travel of the drive mechanism relative to the outer housing at a particular point on the non-linear path is arranged to coincide with the direction of the dominant vibration occurring in the drive mechanism relative to the outer housing when a particular force is applied to the outer housing to move the drive mechanism relative to the outer housing to that point on the non-linear path against the biasing force of the biasing member.

Hammer drill

Hammer

The disclosure describes a handle assembly for a power tool that includes attachment means for attaching the assembly to a housing of a power tool. The handle means is adapted to be held by a user of the power tool and the handle means is mounted to the attachment means and is capable of limited movement relative to the housing of the power tool. The vibration damping means acts between said housing and said handle means. The vibration damping means can also comprise elastomeric material. The attachment means can be mounted in use to the housing via a bolt on one of the attachment means and the housing passing through a respective aperture in the other of said attachment means and the housing. At least some of the elastomeric material is arranged in use between at least one said bolt and a corresponding said aperture. The handle means can be pivotable and/or slidable relative to said attachment means. The vibration damping means can comprise at least one spring (e.g., compression/spring or torsion spring).

Vibration reduction apparatus for power tool and power tool incorporating such apparatus

A power tool has a handle capable of limited movement mounted to its housing. An axle is rotatably connected to the housing and is movable between a first and second positions and is spring biased towards the first position. Arms are connected to and rotate with the axle. Connectors are slidably mounted within guides and are connected at one end to the arms and at the other end to the handle. Vibrations in the body of the power tool cause movement of one end of the handle, which causes movement of a connector and in turn movement of an arm. Movement of the arm causes rotation of the axle which therefore causes movement of the other arm. This in turn causes the related connector to slide within its guide and move the other end of handle. Thus, movement of one end of the handle is coupled to the other end.

Drill

A vibration reduction apparatus for use with a hammer tool having a hammer piston is disclosed. The hammer piston is caused to reciprocate in the cylinder by rotation of a gear wheel and crank drive. A cam is mounted around the gear wheel, a counterweight surrounds the piston cylinder, and a cam follower is provided on the counterweight. The cam follower on the counterweight is urged into contact with the cam by a biasing element. The external profile of the cam is such that rotation of the gear wheel causes oscillation of the counterweight in antiphase to motion of the hammer piston to counteract vibrations produced by operation of the hammer action of the tool. A mechanism is provided to deactivate the vibration reduction apparatus when the hammer action of the tool is deactivated.

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Oberursel, Germany

Michael Stirm