Abstract: Provided is a self-propelled surface cleaning machine including a front wheel device, a steering device associated therewith, a steering angle sensor device capable of detecting a steering angle at the front wheel device, a rear wheel device having a left rear wheel and a right rear wheel, an electromotive drive device associated with each of the left rear wheel and the right rear wheel, a cleaning liquid application device by which cleaning liquid is applicable to a floor/ground in an application area arranged between the front wheel device and the rear wheel device, and a control device operatively connected for signal communication with the steering angle sensor device and the electromotive drive devices, wherein each electromotive drive device is controllable individually depending on signals from the steering angle sensor device.

Abstract: A method is proposed for operating a cleaning appliance which comprises a control device as well as at least one cleaning element for cleaning a surface which has a memory element. The control device comprises a control memory member and the control device is connected to a reader for reading the memory element. In order to reduce the risk of the user unintentionally using an unsuitable cleaning element, it is suggested that characterizing data distinguishing the type of cleaning element be stored in the memory element, these data being read and evaluated in the period of time from the starting up of the cleaning appliance up to the beginning of the cleaning action of the cleaning element. In addition, a cleaning appliance for implementing the method is suggested.

Abstract: The invention relates to a cleaning apparatus, comprising an operating unit for operating the cleaning apparatus, at least one functional unit for carrying out an operating instruction, and a control unit for receiving operating instructions performed on the operating unit and controlling the at least one functional unit based on said operating instructions, wherein an access authorization stored on an authorization carrier is required in order to operate the cleaning apparatus. In order to provide such a cleaning apparatus with a more user-friendly access control, it is proposed that the cleaning apparatus have a detection unit operatively connected to the control unit and configured for contactless detection of the access authorization and transmission thereof to the control unit, and that the access authorization be verifiable for its validity by the control unit. The invention further relates to a method for controlling access to a cleaning apparatus.

Abstract: The invention relates to a cleaning tool for a cleaning device, the cleaning tool being subject to wear during operation. In order to make it easier to identify wear, the invention proposes that the cleaning tool comprise a sensor device with a sensor element which has a physical characteristic variable which changes as a function of the degree of wear of the cleaning tool. The invention also proposes a cleaning device having such a cleaning tool, the cleaning device having a detector device which is coupled to the sensor device for the purpose of sensing the change in the physical characteristic variable of the sensor element, and having an indicator device which is connected to the detector device.

Abstract: The invention relates to a floor cleaning appliance comprising a housing, on the underside of which is arranged at least one drivable cleaning tool for removing dirt from a surface to be cleaned, and further comprising a suction unit for vacuuming-off the dirt and a dirt container for receiving the vacuumed-off dirt. In order to so develop such a floor cleaning appliance that it is easier to service, it is proposed in accordance with the invention that the housing comprise a dirt container receptacle in which the dirt container is releasably positionable, and, in addition, at least one functional device receptacle for at least one functional device, the at least one functional device or a cover of the at least one functional device being freely accessible after removal of the dirt container from the dirt container receptacle.

Abstract: The invention relates to a cleaning tool for a cleaning device, the cleaning tool being subject to wear during operation. In order to make it easier to identify wear, the invention proposes that the cleaning tool comprise a sensor device with a sensor element which has a physical characteristic variable which changes as a function of the degree of wear of the cleaning tool. The invention also proposes a cleaning device having such a cleaning tool, the cleaning device having a detector device which is coupled to the sensor device for the purpose of sensing the change in the physical characteristic variable of the sensor element, and having an indicator device which is connected to the detector device.

Abstract: A machine-tool turret-type unit includes a turret disk that is free to rotate about a rotational axis, and a housing on which to mount the turret disk is provided. The housing includes at least one securing device to be secured to the securing section of the machine tool. The securing device includes at least one securing surface to rest against the securing section of the machine tool. The rotational axis lies within a first plane defined by the securing surface(s).

Abstract: The invention relates to a mobile floor-cleaning machine having a rotationally drivable, disk-like cleaning tool which is detachably held on a tool holder, the tool holder being connected to a drive shaft in a rotationally fixed manner. In order to develop the floor-cleaning machine in such a way that the cleaning tool can be easily replaced, the invention proposes that said cleaning tool is adapted to be detachably latched to the tool holder and to be disconnected from the tool holder in the axial direction by means of an unlatching mechanism which is adapted to be operated by the user.

Abstract: The invention relates to a mobile floor-cleaning machine having a rotationally drivable, disk-like cleaning tool which is detachably held on a tool holder, the tool holder being connected to a drive shaft in a rotationally fixed manner. In order to develop the floor-cleaning machine in such a way that the cleaning tool can be easily replaced, the invention proposes that said cleaning tool is adapted to be detachably latched to the tool holder and to be disconnected from the tool holder in the axial direction by means of an unlatching mechanism which is adapted to be operated by the user.

Abstract: A grab picks up a hollow workpiece and displaces it to a machining station where, while the workpiece is held in the grab, a tool is engaged from outside with a first surface of the workpiece to finish the first surface. Then the workpiece is reoriented by the grab and engaged by a tool with a second surface of the workpiece to finish the second surface. Another tool is fitted through a large-diameter hole of the workpiece and positioned inside the workpiece adjacent a small-diameter hole and a drive spindle is coupled through the small-diameter hole to the other tool to machine an inner surface of the workpiece adjacent the small-diameter hole. These steps are then repeated to finish another interior surface of the workpiece adjacent another small-diameter hole. Finally the workpiece is displaced from the machining station and released from the grab.

Abstract: An inductive measurement is carried out of the distance between a workpiece (3) and a working head (1), which bears an induction coil (8), through which an alternating current flows and which is part of a resonance circuit whose oscillation frequency is monitored for changes which occur as a consequence of changes in the distance between the workpiece (3) and working head (1). In this case, the working head (1) acts on the workpiece (3) with a material (2) having a dielectric constant greater than 1. The frequency of the alternating current is in the megahertz region or just therebelow. Last but not least, the induction coil is screened from external electric fields in order to avoid the influence of parasitic capacitances.

Abstract: In a method of machining a first and a second surface recess in a workpiece, the workpiece has a longitudinal axis and a first local Cartesian coordinate system. The machine tool has a longitudinal axis and a second local Cartesian coordinate system, the first and second surface recess are associated with a first and second recess longitudinal axis and a non-circular cross-section. The recesses are separated on the surface of the workpiece such that they are mirror images of each other about a plane along the longitudinal workpiece axis. A skew angle is defined between the first recess longitudinal axis and the workpiece axis in the first plane.

Abstract: Method and apparatus providing a tool turret for a machine tool with at least one motor-driven tool that is suitable for machining of wavy or tubular workpieces. The transport of the workpieces from one machining station to the next is effected in a simpler, more reliable, and less expensive fashion, because the machine tool has a tool turret that includes a gripping element for taking hold of, transporting, and positioning workpieces, rather than using an additional tool.

Abstract: Method and apparatus providing a tool turret for a machine tool with at least one motor-driven tool that is suitable for machining of wavy or tubular workpieces. The transport of the workpieces from one machining station to the next is effected in a simpler, more reliable, and less expensive fashion, because the machine tool has a tool turret that includes a gripping element for taking hold of, transporting, and positioning workpieces, rather than using an additional tool.

Abstract: An inductive measurement is carried out of the distance between a workpiece (3) and a working head (1), which bears an induction coil (8), through which an alternating current flows and which is part of a resonance circuit whose oscillation frequency is monitored for changes which occur as a consequence of changes in the distance between the workpiece (3) and working head (1). In this case, the working head (1) acts on the workpiece (3) with a material (2) having a dielectric constant greater than 1. The frequency of the alternating current is in the megahertz region or just therebelow. Last but not least, the induction coil is screened from external electric fields in order to avoid the influence of parasitic capacitances.

Abstract: In order to simplify the construction of the mounting arrangement in a sweeping machine including a rotatably driven brushing roller which is rotatably mounted at each end in a frame and is driven at one end by a gear wheel which forms the mounting for the brushing roller at this end and the teeth of which engage in driver recesses in the brushing roller, it is proposed that the brushing roller be displaceable in an axial direction against the effect of a spring towards the gear wheel to such an extent that the mounting of the brushing roller at the end thereof remote from the gear wheel will disengage, and that the teeth of the gear wheel should engage in the driver recesses with so much play that the thus axially displaced brushing roller can be pivoted out from the region of the mounting by at least the radius of the brushing roller at said end remote from the gear wheel.