Abstract: A rotor hub of a wind turbine comprising a hub housing, which has a plurality of connecting flanges, which are each adapted for connection of a rotor blade, wherein each of the rotor blades is coupled to a pitch drive for rotating the rotor blade, wherein the pitch drive is connected to an arrangement of electrical control devices, which are adapted to control the pitch drive. The arrangement of the control devices is provided in a module as a structural unit, the module being connected as a whole to the hub housing.

Abstract: A rotor blade for a rotor of a wind power installation, to a rotor for a wind power installation, to a wind power installation having a rotor blade and/or having a rotor, and to a method for connection of a rotor blade at a hub of a rotor of a wind power installation. The rotor blade comprises a hub-side end for fastening the rotor blade to a movable part of a blade bearing, wherein a bearing cover is arranged on an outer circumferential surface of the hub-side end of the rotor blade, wherein a portion of the bearing cover that is close to the bearing is further away from the outer circumferential surface of the hub-side end of the rotor blade than a portion of the bearing cover that is remote from the bearing by a multiple.

Abstract: A rotor blade for a rotor of a wind power installation, to a rotor for a wind power installation, to a wind power installation having a rotor blade and/or having a rotor, and to a method for connection of a rotor blade at a hub of a rotor of a wind power installation. The rotor blade comprises a hub-side end for fastening the rotor blade to a movable part of a blade bearing, wherein a bearing cover is arranged on an outer circumferential surface of the hub-side end of the rotor blade, wherein a portion of the bearing cover that is close to the bearing is further away from the outer circumferential surface of the hub-side end of the rotor blade than a portion of the bearing cover that is remote from the bearing by a multiple.

Abstract: A rotor hub of a wind turbine comprising a hub housing, which has a plurality of connecting flanges, which are each adapted for connection of a rotor blade, wherein each of the rotor blades is coupled to a pitch drive for rotating the rotor blade, wherein the pitch drive is connected to an arrangement of electrical control devices, which are adapted to control the pitch drive. The arrangement of the control devices is provided in a module as a structural unit, the module being connected as a whole to the hub housing.

Abstract: A pump (10) for circulating a cryogenic coolant, comprising: a cylinder housing (14); a piston (16) received in said cylinder housing (14) for reciprocating in said cylinder housing (14) between a first death center position (18) and a second death center position (20), said first death center position (18) and said second death center position (20) defining a compression chamber (22) therebetween; an outlet (34) for said compression chamber (22); and an inlet (36) formed in a wall (24) of said cylinder housing (14) at a position between said first death center position (18) and said second death center position (20); wherein said inlet (36) is adapted to establish a fluid connection between said compression chamber (22) and a coolant reservoir (40; 76).

Abstract: A method and system for securely transferring a multiplicity of short messages using an unsecure connection begins by loading a secure domain component on a client device using a secure connection and then loading an unsecure domain component on the client device. Encrypted messages are sent from an unsecure server to the unsecure domain component. The client device transfers the received encrypted message from the unsecure domain to the secure domain, where the secure domain component decrypts the received encrypted messages. This method works repeatedly without reloading either the secure domain component or the unsecure domain component and by using the unsecure connection to transfer the encrypted messages.