Abstract: A guide device for hand-held power tools has a guide part which is configured to be placed onto an upper side of a workpiece to be machined. A roller arrangement is held on the guide part and is configured to roll on the workpiece upper side. The roller arrangement has at least one roller which is mounted rotationally on the guide part.

Abstract: The invention relates to a power tool having a machine housing and a ventilation unit which is provided for cooling a motor unit and/or an electronics unit encased by the machine housing, the cooling being accomplished by means of suctioning a cooling air flow, and which has a deflection unit. The invention provides that the deflection unit has at least one deflection channel that is provided for separating contaminant particles and air of the cooling air flow by means of a deflecting of the cooling air flow.

Abstract: The invention relates to a fan, particularly a radial fan, having a fan hub with a rotational axis. A plurality of fan blades is disposed about the rotational axis for deflecting an air flow. The invention provides that an adjustment device is provided at the fan blades for the rotational speed-dependant adjustment of an air flow.

Abstract: Known devices for separating liquids using parallel-connected cyclones, when gas flows are fluctuating, have a poor separating action. In the device of the invention, the separating action is conversely improved by providing that the number of separator elements through which the gas flow flows is adapted in each case to the gas flow. When the gas flow is high, there is a flow through more separator elements than when the gas flow is low. In this way, the separator elements are operated closer to the optimal operating point than in the prior art. According to the invention, it is proposed that a closing body (11) of a distributor valve (13) be disposed movably in a distributor conduit (10) and either automatically or by means of a drive mechanism adjusts the optimal number of separator elements (16) through which there is a flow.

Abstract: Known devices for separating liquids using parallel-connected cyclones, when gas flows are fluctuating, have a poor separating action.