Abstract: An apparatus for a vacuum cleaner for compensating air pressure fluctuations includes a main body through which an air flow is flowable in a flow direction, where the main body contains a passage opening, and a separating element, where the passage opening is separated from ambient air by the separating element. The separating element is movable such that, as a result of a movement of the separating element in a radial direction, a reservoir which receives an air volume is produced between the main body and the separating element such that a vacuum produced in the main body by the air flow is at least partially maintained.

Abstract: An apparatus for receiving a functional unit for a power tool, wherein the receiving apparatus can be fastened to the power tool by way of a fastening mechanism. A second aspect of the invention relates to a method for fastening a receiving apparatus of this kind to a power tool. In the fastening mechanism, a rotatable insert part can be inserted into an opening of the receiving apparatus and can be moved from an unfastened to a fastened state by this rotational movement. In the fastened state, a hook of the power tool engages with a raised portion of the insert part.

Abstract: A ring saw blade includes a flat annular support which has a side face and an outer circumference. One or more cutting elements are disposed along the outer circumference. An annular groove is recessed into the side face and has a radially inner flank and a radially outer flank. The radially inner flank is conical and a first cone describing the radially inner flank has a half opening angle of between 10 degrees and 30 degrees.

Abstract: A handle for a power tool, wherein the handle has a safety switch and an operating switch. The handle is characterized in that the safety switch includes a switching region and a front region, wherein the front region is configured to interact with a mating contour of the operating switch such that unintentional switching on of the power tool is prevented. A power tool having a proposed handle is also provided. An improved locking possibility for an operating switch of a power tool can advantageously be provided.

Abstract: A power tool system and to a method for connecting a vacuuming device to a power tool. The system comprises a power tool having a tool, a vacuuming device for extracting dust that arises when working with the power tool, and a suction connection device, wherein the suction connection device is arranged between the tool of the power tool and the power tool and is connectable to the power tool in that a toothing of the power tool is able to be engaged with a mating toothing on the suction connection device. The present invention advantageously makes it possible for a suction hose that connects the vacuuming device and the suction connection device of the power tool system together to be able to be fixed relative to a handle of the power tool. Furthermore, an angle between the suction hose and the handle of the power tool can be set particularly easily.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roll is disposed in a hood that is pivotable relative to the cutting plane.

Abstract: A method for setting a gear in a transmission of a power tool, the power tool including an electric motor as well as a controller for setting the rotational speed of the electric motor. A transmission includes an operating device for selecting a gear in the transmission, a shift fork as well as an actuator, the operating device including a signal transmitter as well as a sensor for receiving a signal of the signal transmitter.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roll is disposed in a hood that is pivotable relative to the cutting plane.

Abstract: A ring saw blade includes a flat annular support which has a side face and an outer circumference. One or more cutting elements are disposed along the outer circumference. An annular groove is recessed into the side face and has a radially inner flank and a radially outer flank. The radially inner flank is conical and a first cone describing the radially inner flank has a half opening angle of between 10 degrees and 30 degrees.

Abstract: ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. The driving wheel is mounted in a bearing block so as to be rotatable about a drive axis perpendicular to the cutting plane. The bearing block is movable parallel to the cutting plane.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a receiving space in which the tool holder is disposed, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a side of the cutting plane where the ring saw blade is guidable by the guide roller from the side and where an outlet of a water flushing system is directed at the guide roller.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel that drives the ring saw blade in the cutting plane and that is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roller is mounted such that the guide roller is freely rotatable about an axis of rotation where the axis of rotation slopes by 50 degrees to 80 degrees relative to the cutting plane.

Abstract: An apparatus for a vacuum cleaner for compensating air pressure fluctuations includes a main body through which an air flow is flowable in a flow direction, where the main body contains a passage opening, and a separating element, where the passage opening is separated from ambient air by the separating element. The separating element is movable such that, as a result of a movement of the separating element in a radial direction, a reservoir which receives an air volume is produced between the main body and the separating element such that a vacuum produced in the main body by the air flow is at least partially maintained.

Abstract: A method for selecting a gear in the transmission of a power tool having an electric motor. The method includes the following steps of changing an operating device from a first position to a second position in order to select a gear in the transmission; detecting a signal via at least one sensor corresponding to the second position of the operating device; sending the signal to a controller; changing the rotational speed of the electric motor from a first value to a second value via the controller; changing the operating device from the second position to a third position; changing the stepping motor from a first position to a second position corresponding to the third position of the operating device; and changing a shift fork from a first position to a second position in order to change from a first gear to a second gear.

Abstract: An apparatus for receiving a functional unit for a power tool, wherein the receiving apparatus can be fastened to the power tool by way of a fastening mechanism. A second aspect of the invention relates to a method for fastening a receiving apparatus of this kind to a power tool. In the fastening mechanism, a rotatable insert part can be inserted into an opening of the receiving apparatus and can be moved from an unfastened to a fastened state by this rotational movement. In the fastened state, a hook of the power tool engages with a raised portion of the insert part.

Abstract: A hose coupling system including an inlet fitting, which is to be arranged or is arranged on a vacuum cleaner, and including a tubular connection piece, which is to be connected or is connected to a suction hose, wherein the connection piece is to be inserted into the inlet fitting in the coaxial direction, wherein the hose coupling system has an actuable latching element by means of which the connection piece can be held in the inlet fitting in a form-fitting manner and can be released again as required.

Abstract: A handheld core drilling device includes a tool receptacle where the tool receptacle has a receiving sleeve and a tool receiving piece disposed in the receiving sleeve. A compression spring arrangement is disposed within the receiving sleeve. Exactly three equally spaced retaining tabs are formed on the receiving sleeve along a circumferential direction and each retaining tab has a respective stop surface that faces the tool receiving piece. Exactly three equally spaced bearing surfaces are formed on the tool receiving piece along a circumference of the tool receiving piece and each bearing surface faces a respective stop surface. Each of the bearing surfaces includes a stud with a stud surface where the stud surfaces in a radial direction are at most half as wide as the bearing surfaces in the radial direction.

Abstract: A method for setting a gear in a transmission of a power tool, the power tool including an electric motor as well as a controller for setting the rotational speed of the electric motor. A transmission includes an operating device for selecting a gear in the transmission, a shift fork as well as an actuator, the operating device including a signal transmitter as well as a sensor for receiving a signal of the signal transmitter.

Abstract: A method for selecting a gear in the transmission of a power tool having an electric motor. The method includes the following steps of changing an operating device from a first position to a second position in order to select a gear in the transmission; detecting a signal via at least one sensor corresponding to the second position of the operating device; sending the signal to a controller; changing the rotational speed of the electric motor from a first value to a second value via the controller; changing the operating device from the second position to a third position; changing the stepping motor from a first position to a second position corresponding to the third position of the operating device; and changing a shift fork from a first position to a second position in order to change from a first gear to a second gear.

Abstract: A handheld core drilling device includes a tool receptacle where the tool receptacle has a receiving sleeve and a tool receiving piece disposed in the receiving sleeve. A compression spring arrangement is disposed within the receiving sleeve. Exactly three equally spaced retaining tabs are formed on the receiving sleeve along a circumferential direction and each retaining tab has a respective stop surface that faces the tool receiving piece. Exactly three equally spaced bearing surfaces are formed on the tool receiving piece along a circumference of the tool receiving piece and each bearing surface faces a respective stop surface. Each of the bearing surfaces includes a stud with a stud surface where the stud surfaces in a radial direction are at most half as wide as the bearing surfaces in the radial direction.