Abstract: A method for operating a machine tool, in particular an angle grinder, comprising a tool rotatably bringable into operative connection with a driven shaft, the machine tool having a drive device for actuating the driven shaft, a control device for actuating the drive device and at least one sensor device operatively connected to the control device. The method has the following steps: determining a speed value of the driven shaft; determining a speed value of the tool using the sensor device, which interacts with the tool, controlling an output device and/or controlling, in a predefined manner, the drive device via the control device when a difference between the determined speed value of the driven shaft and the determined speed value of the tool is greater than a defined limit value. A machine tool for carrying out a method of this kind is also described.

Abstract: A method for operating a machine tool (1), in particular an angle grinder, comprising a tool (3) that can be rotatably brought into operative connection with a driven shaft (7), the machine tool (1) having a drive device (4) for actuating the driven shaft (7), a control device (8) for actuating the drive device (4) and at least one sensor device (9, 10) operatively connected to the control device (8). The sensor device (9, 10) is used to determine whether a device (3, 11) is operatively connected in a defined manner to a defined region of the machine tool (1), the control device (8) enabling operation of the drive device (4) only if the query result is positive. A machine tool (1) for carrying out a method of this kind is also described.

Abstract: A method for operating a hand-held machine tool including a tool that can be brought into operative connection with a driven shaft, the machine tool having a drive device for actuating the driven shaft, a control device for actuating the drive device and at least one sensor device operatively connected to the control device. The method includes: determining a value of a feed rate of the machine tool using the at least one sensor device; determining a speed value of the driven shaft; determining an output value by means of the control device on the basis of the speed value of the driven shaft and the value of the feed rate; and controlling an output device in a predefined manner and/or controlling the drive device in a predefined manner by means of the control device on the basis of the determined output value. A machine tool is also described.

Abstract: Mechanotronic implant for use in the human body, with a first element, a second element, a drive unit, which is connected in fixed manner to the first element, wherein the drive unit contains an output unit which is connected to the second element in order to move the second element relative to the first element, an implantable energy receiver connected to the drive unit for wireless powering of the drive unit with energy, and a switch in order to switch the drive unit from a first operating direction to a second operating direction.

Abstract: Method for wirelessly transmitting energy from a primary device (1) to an implantable secondary device (2), wherein the primary device includes a primary coil (11) and the secondary device (2) includes a secondary coil (12) for electromagnetic interaction with the primary coil (11), with a control process which includes: measuring a primary current flowing through the primary coil (11) and a primary voltage applied to the primary coil, calculating a secondary current of the secondary coil (12) and a secondary voltage of the secondary coil (12) on the basis of the measured primary current and the measured primary voltage, comparing the calculated secondary current with a desired secondary current and/or the calculated secondary voltage with a desired secondary voltage, predefining a desired primary current and a desired primary voltage on the basis of the comparison, and operating the primary coil with the desired primary voltage and the desired primary current in order to transmit energy to the secondary coil

Abstract: Mechanotronic implant for use in the human body, with a first element, a second element, a drive unit, which is connected in fixed manner to the first element, wherein the drive unit contains an output unit which is connected to the second element in order to move the second element relative to the first element, an implantable energy receiver connected to the drive unit for wireless powering of the drive unit with energy, and a switch in order to switch the drive unit from a first operating direction to a second operating direction.

Abstract: Method for wirelessly transmitting energy, in which case energy is wirelessly transmitted from a primary device (1) to an implantable secondary device (2), and in which case the primary device comprises a primary coil (11) and the secondary device (2) comprises a secondary coil (12) for electromagnetic interaction with the primary coil (11), with a control process which comprises: measuring a primary current flowing through the primary coil (11) and a primary voltage applied to the primary coil, calculating a secondary current of the secondary coil (12) and a secondary voltage of the secondary coil (12) on the basis of the measured primary current and the measured primary voltage, comparing the calculated secondary current with a desired secondary current and/or the calculated secondary voltage with a desired secondary voltage, predefining a desired primary current and a desired primary voltage on the basis of the comparison, and operating the primary coil with the desired primary voltage and the desired prim

Abstract: A transportation system which is linked through a common single operating system, in the form of a vacuum tube-link network of transport tubes avoids the limitations of current transportation systems in terms of cost of construction, continuous rising costs of maintenance, limited speed capacity, limited volume capacity, insufficient safety, and vulnerability to environmental and climatic changes. The present invention offers year-round, uninterrupted operation while providing a safe haven at stations for the public during environmental or climatic conditions making sustaining life difficult or impossible. The transportation system of the present invention operates in a contained vacuum tube link environment within which a transport capsule is levitated. Levitation is provided by permanent magnets located in the interior of the transport tube and liquid-cooled super-conducting bulk elements located on the capsule. Cooling may be provided by a fluid such as nitrogen, helium, etc.

Abstract: A land-based transportation and infrastructure system that allows high-speed transport for passengers, freight transport, a power management and distribution system. The transport-web infrastructure network system (T.W.I.N.S.) design includes a containment tube-link network that contains within it a transport tube-link network and a utilities grid infrastructure. The transport tube-link network is a vacuum environment within which a transport capsule is levitated by permanent magnets located in the interior of the transport tube plus super-conducting bulk elements located on the capsule and thus combined with a liquid coolant, such as nitrogen or helium, allows for greater speed since no friction exists within such a vacuum environment. Typically, the containment tubes are designed to be sub-ground, even though above ground is also an option.

Abstract: An aqua-terra planetary transport system and development system utilizing a pneumatic and electromagnetic underwater tube link transportation system to move passengers and cargo rapidly between a network of interconnected land based terra station and ocean based aqua stations. The aqua stations are all self-sufficient and derive power from natural resources and have means for agriculture and manufacturing.

Abstract: An aqua-terra planetary transport system and development system utilizing a pneumatic and electromagnetic underwater tube link transportation system to move passengers and cargo rapidly between a network of interconnected land based terra station and ocean based aqua stations. The aqua stations are all self-sufficient and derive power from natural resources and have means for agriculture and manufacturing.