Abstract: A marine propulsion unit for a marine vessel has a power source for rotating a pitchable propeller around an axis. The pitchable propeller is connected with a first shaft and a second shaft, an adjustment device comprising a first part being connected with the first shaft, a second part being connected with the second shaft, and a movable part. The movable part is configured to be moved between a first position and a second position so as to turn the first part and/or the second part thereby providing a phase shift between the first shaft and the second shaft for pitching and/or folding the pitchable propeller.

Abstract: An electric machine for a marine vessel has a motor axle extending along a central axis of the electric machine. The motor axle has a first end and a second end, where the first end is arranged to drive a propeller of the marine vessel. An elongated rotationally symmetric hollow rotor is fixedly attached to the motor axle and radially external to the motor axle, such that a volume is formed between the motor axle and the hollow rotor. The electric machine further comprising an elongated rotationally symmetric hollow stator at least partly received in the volume formed between the motor axle and the hollow rotor. The motor axle and the hollow rotor comprise a plurality of permanent magnets arranged facing the inside and the outside of the hollow stator, respectively, and where the hollow stator comprises a plurality of coils arranged to be electrically connected to an external control unit, where each coil is arranged to generate a respective magnetic flux in the radial direction.

Abstract: A marine propulsion unit has at least one motor for rotating a pitchable propeller around an axis. The pitchable propeller is connected with a first shaft and a second shaft, the first shaft being rotated by a first power way, the second shaft being rotated by a second power way. The first power way and the second power way are controllable independently of each other so that a first rotation speed (rpm) of the first shaft and a second rotation speed (rpm) of the second shaft can vary.

Abstract: A marine propulsion unit has at least one motor for rotating a pitchable propeller around an axis. The pitchable propeller is connected with a first shaft and a second shaft, the first shaft being rotated by a first power way and the second shaft being rotated by a second power way. The first power way and the second power way are controllable independently of each other so that a first rotation speed (rpm) of the first shaft and a second rotation speed (rpm) of the second shaft can vary in relation to each other. A coupling is arranged between the first shaft, the second shaft and the pitchable propeller for changing a pitch angle of the pitchable propeller when the first rotation speed and/or second rotation speed vary in relation to the other.

Abstract: A computer-implemented method for maneuvering a boat provided with a single drive unit, includes: Obtaining net momentum direction data indicative of a target horizontal rotational movement of the hull, triggering a series of bursts of thrust by the drive unit, said series of bursts of thrust comprising a plurality of primary bursts and a plurality of secondary bursts directed differently than the primary bursts, The primary bursts and the secondary bursts are directed such that they provide a respective longitudinal thrust component parallel to a hull longitudinal axis. The primary bursts are directed such that the longitudinal thrust components of the primary bursts act in the opposite direction with respect to the direction of the longitudinal thrust components of the secondary bursts. The primary bursts and the secondary bursts are further directed such that they jointly provide a net momentum on the hull associated with said net momentum direction data.

Abstract: A marine propeller propulsion unit has a double-pinion planetary gear for driving a front and a rear propeller by means of an input shaft. A sun gear is adapted to be connected to the input shaft, a ring gear is adapted to be connected to the front propeller, and a planet carrier is adapted to be connected to the rear propeller.

Abstract: A marine propeller propulsion unit has a compound planetary gear for driving a propeller, a propulsion motor for driving the compound planetary gear, and a housing for enclosing the propulsion motor and the compound planetary gear. The compound planetary gear comprises a sun gear, a ring gear, a planet carrier, a first planet gear and a second planet gear. The radius of the second planet gear exceeds the radius of the first planet gear and the first and second planet gears are rotationally fixed to one another. The ring gear meshes with the first planet gear and the sun gear meshes with the second planet gear. The sun gear is adapted to be connected to the propulsion motor and the ring gear is adapted to be connected to the propeller.

Abstract: An electrical drive system for a marine vessel is provided. The system comprises an electric machine arranged below a water level, an inboard electrical energy storage system, wherein the electric machine is connected to the inboard electrical energy storage system via at least one electric cable, and at least one cable cutter arranged to cut the at least one electric cable in the event of impact.

Abstract: A safety system for a marine vessel, the safety system comprising a plurality of proximity sensors, each proximity sensor having a detection zone and configured to detect objects within the detection zone; and a computer system comprising processing circuitry configured to trigger an action to stop rotation of the propeller in response to information from at least one of the plurality of proximity sensors indicating detection of an object within the detection zone of at least one of the plurality of proximity sensors. The plurality of proximity sensors arranged such that the detection zones of the plurality of proximity sensors enclose the propeller in a plane parallel to the longitudinal direction and the transversal direction.

Abstract: A drive assembly for a marine propeller drive unit has two concentric drive shafts for carrying a respective propeller. A space between the drive shafts is lubricated with liquid lubricant pumped into the space by a pump. The outermost drive shaft is provided with at least one protrusion protruding radially inwards from an inner surface of the outer drive shaft. The inlet of the secondary fluid channel is provided in said at least one protrusion at a first radial level offset radially inwards from the inner surface of the outer drive shaft such that liquid lubricant at said first radial level is able to lubricate bearings between the outermost drive shaft and the innermost drive shaft.

Abstract: A computer implemented diagnostics system for a marine propeller drive unit is provided. The diagnostics system comprising processing circuitry connected to a speed sensor system and to a control unit associated with the electric machine. The speed sensor system is arranged in connection to the differential arrangement to provide propeller speed data to the processing circuitry indicative of a speed of rotation of at least one of the propeller axles of the self-balancing propeller drive unit. The control unit is arranged to provide motor current data to the processing circuitry indicative of a motor current drawn by the electric machine. The processing circuitry is arranged to monitor the motor current data from the control unit, and the propeller speed data from the speed sensor system, and to classify a state of the self-balancing propeller drive unit into a pre-determined number of states comprising one or more fault states, based on the motor current data and on the propeller speed data.

Abstract: There is provided a method of controlling a mechanical ventilator. The method may include the steps of receiving a measurement of transthoracic impedance of a patient obtained during chest compressions, determining a timing for a mechanical ventilator to provide a ventilation based on the measurement of transthoracic impedance, and sending a signal to control the mechanical ventilator based on the determined timing. There is also provided an apparatus for performing the method.

Abstract: A chest compression device for cardiopulmonary resuscitation comprises a support structure 2 for placement about a patient's chest and for holding a chest compressor 6 above a patient's sternum; a chest compressor 6 mounted on the support structure 2; and lateral chest supports 14 attached to the support structure 2 at points laterally either side of the chest when the device is in use, such that the lateral chest supports 14 will apply lateral pressure to the sides of the chest synchronized with a chest compression by the chest compressor 6.

Abstract: A chest compression device for cardiopulmonary resuscitation comprises a support structure 2 for placement about a patient's chest and for holding a chest compressor 6 above a patient's sternum; a chest compressor 6 mounted on the support structure 2; and lateral chest supports 14 attached to the support structure 2 at points laterally either side of the chest when the device is in use, such that the lateral chest supports 14 will apply lateral pressure to the sides of the chest synchronized with a chest compression by the chest compressor 6.

Abstract: A chest compression device for cardiopulmonary resuscitation may include a support structure for placement about a patient's chest and for holding a chest compressor above a patient's sternum; a chest compressor mounted on the support structure; and lateral chest supports attached to the support structure at points laterally on either side of the chest when the device is in use, such that the lateral chest supports will apply lateral pressure to the sides of the chest synchronised with a chest compression by the chest compressor.

Abstract: The invention comprises an apparatus and a method for externally assessing and monitoring placement of an endo-tracheal tube for ventilation of patients based on thoracic impedance measurement.

Abstract: There is provided a method of controlling a mechanical ventilator. The method may include the steps of receiving a measurement of transthoracic impedance of a patient obtained during chest compressions, determining a timing for a mechanical ventilator to provide a ventilation based on the measurement of transthoracic impedance, and sending a signal to control the mechanical ventilator based on the determined timing. There is also provided an apparatus for performing the method.

Abstract: A chest compression device for cardiopulmonary resuscitation may include a support structure for placement about a patient's chest and for holding a chest compressor above a patient's sternum; a chest compressor mounted on the support structure; and lateral chest supports attached to the support structure at points laterally on either side of the chest when the device is in use, such that the lateral chest supports will apply lateral pressure to the sides of the chest synchronised with a chest compression by the chest compressor.

Abstract: The invention comprises an apparatus and a method for externally assessing and monitoring placement of an endo-tracheal tube for ventilation of patients based on thoracic impedance measurement.

Abstract: The invention comprises an apparatus and a method for externally assessing and monitoring placement of an endo-tracheal tube for ventilation of patients based on thoracic impedance measurement.