Abstract: 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 (324) mounted to a housing (290) of the power tool and a vibration damper (332) mounted to a handle (294) of the power tool and slidably mounted to the metal bar. The vibration damper includes a vibration damping member (344) 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.

Abstract: 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.

Abstract: 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.

Abstract: 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).

Abstract: A switch assembly for a power tool comprises a switch member and a fixing part. The switch member comprises 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.

Abstract: 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.

Abstract: 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 means of 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.

Abstract: 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 (324) mounted to a housing (290) of the power tool and a vibration damper (332) mounted to a handle (294) of the power tool and slidably mounted to the metal bar. The vibration damper includes a vibration damping member (344) 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.

Abstract: 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.

Abstract: 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.

Abstract: A hammer includes a housing; a motor mounted within the housing; and a tool holder rotatably mounted on the house for holding a cutting tool. A striker is mounted in a freely slideable manner within the housing, for repetitively striking an end of a cutting tool when a cutting tool is held by the tool holder. The striker is reciprocatingly driven by the motor, when the motor is activated, via a drive mechanism. The drive mechanism comprises: a pivoting drive arm pivotally mounted within the housing at one end and which is drivingly connected to the striker; a pivotal drive mechanism connected to the pivoting drive arm and which converts a rotary movement generated by the motor into an oscillating pivotal movement of the pivoting drive arm; and the amplitude of the oscillations of the pivoting drive arm can be adjusted.

Abstract: A hand held motor driven electrically powered tool, in particular a rotary hammer, comprising a spindle (40) for rotatingly driving a tool or bit (68), a spindle rotary drive train (14, 5, 10) for rotatingly driving the spindle (40) and an arrangement for detecting blocking events (16, 17). Blocking events occur when the tool or bit of the tool become rotationally fixed in the material being bored in which case the rotary drive on the spindle from the motor causes the tool housing to rotate in a user's grip.