Ab Volvo Penta

Staffan T Mansson

Lennart H Brandt

Lennart Arvidsson

Oddbjorn Hallenstvedt

Oddbjörn Hallenstvedt

An outboard drive for boats, having a steerable underwater housing () which has a wing-profiled portion (). Projecting at an approximately 90 degree angle from the aft part of one side face () of the wing profile is a face portion (), the lateral extent of which amounts to about 1&#x2013;2% of its distance to the steering shaft () of the wing profile. As a result of this construction, a lifting force will be generated during forward travel in the water. The face portion is configured on that side of the profile which produces a lifting force counter-directional to a steering force, deriving from the motor torque, upon the wing profile.

Outboard drive for boats

A rotatable propeller drive () for a boat, where the propeller drive () includes an upper fixing plate () adapted for rotationally fixed attachment to the hull bottom () of the boat. A lower underwater housing () is provided on which at least one propeller () is mounted, which underwater housing () is mounted rotatably in the fixing plate () about an essentially vertical axis of rotation (). An exhaust duct () is provided with an exhaust exit () located in the underwater housing (). The exhaust duct () has an upper duct section () which extends through the fixing plate () and has an outlet opening () located in proximity to an opposite inlet opening () in a lower duct section () which extends through the underwater housing (). One of the outlet opening () and inlet opening () overlaps the other at least within a limited first rotation angle range for the propeller drive (). A sliding seal arrangement () is adapted for sealing between the upper () and lower () duct sections, where the sliding seal arrangement () includes a sealing element () accommodated in a seat () around one of the outlet opening () and inlet opening (). The sealing element () has a contact surface () for sliding contact with an opposite sliding seal surface () around the other of the outlet opening () and inlet opening ().

Turning propeller drive for a boat

A pulling marine propeller () including multiple propeller blades () attached to a propeller hub (). The propeller hub () is attachable to a propeller shaft () extending from a drive housing () located downstream of the propeller (). The invention is especially characterized by the fact that the propeller hub () is provided with an annular, radially outwardly flared peripheral portion () at an aft end () thereof. The flared portion () is arranged to axially overlap a front end shoulder portion () of the drive housing ().

Pulling marine propeller

Boat propeller transmission with a horizontal input shaft, a bevel gear set, a vertical intermediate shaft, an additional bevel gear set, and at least one horizontal propeller shaft. Between the bevel gear sets, a two-speed planetary gear set is engaged, to provide two gear speeds in the same direction between the input shaft and the propeller shaft. A control unit controls the shifting between the low and high gear speed. A sensor senses the position of a gear selector. When the gear selector is in the reverse position, the control unit locks the planetary gear set in the high speed position, regardless of the engine speed.

Boat propeller transmission

Boat propeller transmission with a horizontal input shaft, a bevel gear set, a vertical intermediate shaft, an additional bevel gear set, and at least one horizontal propeller shaft. Between the bevel gear sets, a two-speed planetary gear set is coupled, to provide two gear speeds in the same direction between the input shaft and the propeller shaft. The planetary gear set has a sun gear which can be locked against the housing of the planetary gear set with the aid of a one-way clutch.

A drive assembly in boats is disclosed, comprising a drive assembly with motor and an inboard-outboard drive coupled to the motor, and a motor bed, which has a passage, through which the assembly extends and which is aligned with a hole in the bottom of the boat, through which the assembly extends. The assembly has an elastic sealing ring which is held pressed between the wall of the passage and the outer surface of the assembly.

Drive installation in boats

The invention relates to a boat propeller having rotatably journalled blades in its hub to enable shifting between forward and reverse without reversing the direction of rotation. The hub is rotatably journalled on the propeller shaft and contains a transmission between the shaft and the blades. The transmission can be coupled between positions for forward, reverse and neutral. The invention uses the torque of the motor and the reaction moment of the water against the blades to achieve a relative rotation between the shaft and the hub, whereby the transmission turns the blades to one of two stops, which define the positions for forward or reverse.

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Hjalteby, Sweden

Staffan T Mansson