Abstract: In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches.

Abstract: A gondola drive for a floating device has an underwater housing circulated around by water. The gondola drive contains a drive module which has a drive module housing and a shaft disposed therein, a transmission module with a transmission module housing and a transmission disposed therein and a propeller. The drive module and the transmission module are each configured as separate components connected to one another such that the drive module housing and the transmission module housing form at least a part of the underwater housing and that the shaft is coupled to the transmission for driving the propeller.

Abstract: At least one embodiment of the invention relates to supplying ships in a harbor with external energy in order to prevent the formation of soot and CO2. For this purpose it is already known to supply ships with power from the wharfage. One problem in such a power supply provided from the wharf is that differences in the harbor's water level must be balanced for the power supply of a ship in the harbor. Furthermore, the operational readiness of such a power supply on land may be adversely affected, such as in the case of high water. At least one embodiment of the invention proposes a buoyant harbor power supply, e.g. the components of the harbor power supply are disposed on or in a buoyant device, particularly a barge.

Abstract: In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches.

Abstract: A gondola drive for a floating device has an underwater housing circulated around by water. The gondola drive contains a drive module which has a drive module housing and a shaft disposed therein, a transmission module with a transmission module housing and a transmission disposed therein and a propeller. The drive module and the transmission module are each configured as separate components connected to one another such that the drive module housing and the transmission module housing form at least a part of the underwater housing and that the shaft is coupled to the transmission for driving the propeller.

Abstract: At least one embodiment of the invention relates to supplying ships in a harbor with external energy in order to prevent the formation of soot and CO2. For this purpose it is already known to supply ships with power from the wharfage. One problem in such a power supply provided from the wharf is that differences in the harbor's water level must be balanced for the power supply of a ship in the harbor. Furthermore, the operational readiness of such a power supply on land may be adversely affected, such as in the case of high water. At least one embodiment of the invention proposes a buoyant harbor power supply, e.g. the components of the harbor power supply are disposed on or in a buoyant device, particularly a barge.