Abstract: A method for rotating a hub of a wind turbine in an inching operation to rotate the hub includes reconfiguring the generator from normal operation by coupling a first string of a first electrical phase of the stator in series with a second string of a second electrical phase of the stator, the first and second strings comprising one or more coils coupled in series. Current is provided from a power converter to the first and second strings o rotate the hub. The generator includes a first and a second winding system, each including a plurality of electrical phases in the normal operation. The first string of the first electrical phase is part of the first winding system in normal operation, and the second string of the second electrical phase is part of the second winding system in the normal operation.

Abstract: A tool tip (10) for a tool being intended for a dental treatment, in particular for a piezoelectric scaler, comprising—a first section (11) extending in a first direction (D1) and—a second section (12) extending in a second direction (D2), the second direction (D2) being inclined relative to the first direction (D1), wherein the first section (11) has at least partially a flat basic body (5).

Abstract: A dispensing device for dispensing a powder preferably from a closed container, the device including a first side, a second side, a powder passage extending through the device and being configured to transfer powder from the first side to the second side, and a ventilation passage extending through the device and being configured to transfer ambient air from the second side to the first side, where the ventilation passage has a first passage length from the surface of the second side up to its ventilation opening and, the powder passage has a second passage length from the surface of the second side up to its powder opening, where the first passage length is larger than the second passage length.

Abstract: The present disclosure relates to methods for rotating a hub of a wind turbine. The method comprises coupling a first string of a first electrical phase of the stator in series with a second string. Further, the method comprises providing current from a power converter to the first and second strings of the stator to rotate the hub. Besides, the second string is configured to be part of a second electrical phase during normal operation of the wind turbine. Wind turbine generators configured to switch between an inching mode and an operation mode are also disclosed.

Abstract: A nozzle element (1) for a dental treatment device, in particular for a dental treatment device intended for a subgingival cleaning of at least a part of a surface of a root of a tooth (3), comprising: a basic body (2) being elongated in a longitudinal direction (L) and configured to be introduced at least partially into a periodontal pocket (7) a first feed channel (10) for transporting a powder-gas-mixture (12), wherein said first feed channel (10) is incorporated inside the basic body (2), a first outlet opening (11) of said first feed channel (10) in an end region (E) of the elongated basic body (2) for ejecting the powder-gas-mixture (12), wherein said first outlet opening (11) is preferably configured for a lateral ejection of the powder-gas-mixture (12) in a first ejection (E1) direction being slanted relative to the longitudinal direction (L), wherein the nozzle element (1) is configured for providing at least a part of at least one pressure relief channel at the end region (E) of the basic body (2).

Abstract: Torque wrench for connecting a replaceable instrument tip to a hand piece that carries the replaceable instrument tip in operation, a base element having a receiving region for placing the instrument tip inside the receiving region at least during connecting the instrument tip to the hand piece, a torque wrench mechanism for applying a certain torque when connecting the instrument tip to the hand piece and a housing surrounding the instrument tip being arranged in the receiving region, the housing being preferably transparent, wherein the torque wrench has a guiding structure for aligning the torque wrench relative to the hand piece during arranging the torque wrench on the hand piece, in particular in an interface region of the hand piece, and/or where the housing has an inner surface and an outer surface being concentric to each other over a complete primary region extending at least from the base element to the end of the instrument tip, when the torque wrench is equipped with the instrument tip.

Abstract: Nozzle system for a powder blasting device including a first nozzle element for transporting a powder-gas mixture stream along a transporting direction and a second nozzle element, where the second nozzle element surrounds the first nozzle element such that at least one channel is formed between the first nozzle element and the second nozzle element, where the channel is provided for transporting a liquid stream, where the first nozzle element and the second nozzle element are arranged such that in operation the powder-gas-mixture stream ejected by the first nozzle element is encased by the liquid stream ejected by the channel for forming an output stream of the nozzle system, where the first nozzle element has an acceleration part having a first cross section and a spreading part having a second cross section, where the spreading part is arranged downstream of the acceleration part.