A steering control system for a watercraft includes a device locking a steering tiller, which can be activated or deactivated for maintaining the tiller in, or moving it from, a predetermined angular position. The locking device includes a hydraulic cylinder having a rod fastened to the transom of the watercraft and a cylindrical body movable along the rod and connected to a steering arm of the motor or of the rudder member. A closed circuit, opened or closed by a valve, flows oil between the two chambers of the hydraulic cylinder and the locking device can be activated or deactivated by an actuator that opens or closes the valve. An interposition element between the steering tiller and a watercraft direction changing member is pivotably articulated to the tiller, and a member transforms the pivoting movement of the tiller relative to the interposition element into commands actuating the valve.

A steering system for a marine vessel comprises a helm, a control head, and a joystick. The helm and control head may respectively provide user inputted steering commands and user inputted shift and throttle commands on a first CAN network. The joystick and the control head may respectively provide user inputted steering commands and user inputted shift and throttle commands on a second CAN network. The helm may provide user inputted steering commands on the first CAN network. The control head may provide user inputted shift and throttle commands on the second CAN network. The joystick may provide user inputted steering commands and user inputted shift and throttle commands on either the first CAN network or the second CAN network.

A steering system for a marine vessel comprises a helm, a control head, and a joystick. The helm and control head may respectively provide user inputted steering commands and user inputted shift and throttle commands on a first CAN network. The joystick and the control head may respectively provide user inputted steering commands and user inputted shift and throttle commands on a second CAN network. The helm may provide user inputted steering commands on the first CAN network. The control head may provide user inputted shift and throttle commands on the second CAN network. The joystick may provide user inputted steering commands and user inputted shift and throttle commands on either the first CAN network or the second CAN network.

A rudder assembly, including a steering engine; an axial hollow rudder stock; a rudder blade; a gas release unit; and a tiller. The steering engine is disposed in a vessel stern. The tiller is connected to the steering engine. The axial hollow rudder stock includes a through hole. The through hole is small and disposed along the axis of the axial hollow rudder stock. The gas release unit is disposed in the vessel stern, and includes a control cabinet. The control cabinet includes a reagent storage tank, a reagent conveying hose connected to the reagent storage tank, a compressed air bottle, a pressure hose connected to the compressed air bottle, and a console. The pressure hose and the reagent conveying hose pass through the through hole of the axial hollow rudder stock, and then communicate with the cavity of the rudder blade.

A steering apparatus comprises a rotatable steering shaft and a sensor which senses angular movement of the steering shaft. An electromagnetic actuator actuates a stop mechanism to releasable engage the steering shaft. There is a microcontroller which causes the electromagnetic actuator to actuate the stop mechanism to fully engage the steering shaft and prevent rotation of the steering shaft in a first rotational direction, which corresponds to movement towards the hardstop position, while allowing rotational play between the steering shaft and the stop mechanism in a second direction, which corresponds to rotational movement away from the hardstop position, when the sensor senses that the steering shaft has reached a hardstop position. A driver applies a reverse polarity pulse to the electromagnetic actuator when the stop mechanism is fully engaged and the steering shaft is rotated, as permitted by the rotational play, in the second rotational direction.

A steering apparatus comprises a rotatable steering shaft and a sensor which senses angular movement of the steering shaft. An electromagnetic actuator actuates a stop mechanism to releasable engage the steering shaft. There is a microcontroller which causes the electromagnetic actuator to actuate the stop mechanism to fully engage the steering shaft and prevent rotation of the steering shaft in a first rotational direction, which corresponds to movement towards the hardstop position, while allowing rotational play between the steering shaft and the stop mechanism in a second direction, which corresponds to rotational movement away from the hardstop position, when the sensor senses that the steering shaft has reached a hardstop position. A driver applies a reverse polarity pulse to the electromagnetic actuator when the stop mechanism is fully engaged and the steering shaft is rotated, as permitted by the rotational play, in the second rotational direction.

A swimming pool cleaner is provided, which includes a housing, a travelling device and a filter screen, two groups of power components with opposite driving directions are provided inside the water outlet chamber, the power component includes an impeller and a water outlet channel, wherein the water outlet channel includes a spiral portion and a linear flowing portion which are sequentially communicated, the linear flowing portion is connected with the water outlet, and the linear flowing portion deflects to the outer side in the spiral direction of the spiral portion, a steering stressed portion is formed at the junction of the linear flowing portion and the spiral portion, and the water outlet is in communication with an outside of the housing and faces towards a direction that is opposite to the travelling direction of the travelling device.

A swimming pool cleaner is provided, which includes a housing, a travelling device and a filter screen, two groups of power components with opposite driving directions are provided inside the water outlet chamber, the power component includes an impeller and a water outlet channel, wherein the water outlet channel includes a spiral portion and a linear flowing portion which are sequentially communicated, the linear flowing portion is connected with the water outlet, and the linear flowing portion deflects to the outer side in the spiral direction of the spiral portion, a steering stressed portion is formed at the junction of the linear flowing portion and the spiral portion, and the water outlet is in communication with an outside of the housing and faces towards a direction that is opposite to the travelling direction of the travelling device.

A removable remotely controllable device for rotating a steering wheel having an outer edge includes a body, first and second wheels or similar rotating elements that are mounted to the body and that defines with the body hooks for mounting the body on the steering wheel via its outer edge, at least one of the two wheels being motorized. The body is configured to hang on the front of the steering wheel while the first and second wheels are operatively mounted onto the outer edge of the steering wheel for transmission of rotation of the motorized wheel thereto. The device further includes a controller mounted to the body and operatively coupled to the at least one motorized wheel for controlling the motorized wheel.

A removable remotely controllable device for rotating a steering wheel having an outer edge includes a body, first and second wheels or similar rotating elements that are mounted to the body and that defines with the body hooks for mounting the body on the steering wheel via its outer edge, at least one of the two wheels being motorized. The body is configured to hang on the front of the steering wheel while the first and second wheels are operatively mounted onto the outer edge of the steering wheel for transmission of rotation of the motorized wheel thereto. The device further includes a controller mounted to the body and operatively coupled to the at least one motorized wheel for controlling the motorized wheel.