Ab Volvo Penta

Other

Lennart H Brandt

Heinz Pichl

Kjell I Borgersen

Staffan T Mansson

Kjell-Idar Borgersen

Carl U Soderbaum

Lars H Petersson

Ingvar O Hultmark

Propulsion arrangement for a marine vessel

The invention relates to an arrangement in propeller installations including means for supplying motor exhaust gases to the vicinity of the propeller (7). The invention is characterized in that a gas outlet (4) is located immediately forwards of the propeller and directs the gas flow towards the sweep of the blade tips of the propeller.

Arrangement in boat propeller installations

A double-propeller drive unit for boats, in which the under-water housing of the drive unit is designed so that the pressure center for the transverse force on the drive housing caused by water flow is located in front of the steering axis of the drive unit.

Propeller drive for boats

The invention relates to a rotor system, particularly a boat propeller system, which consists of a main propeller and a turbo unit in the form of a fore-propeller and a turbine mechanically coupled thereto, the turbo unit being freely rotatably journalled.

Rotor system, particularly a boat propeller system

The invention relates to a boat propeller unit with double, counter-rotating propellers. The forward propeller is designed to function without cavitation, while the after-propeller is optimally cavitating by being made cupped and with a blade width of between 60% and 75% of the blade width of the forward propeller.

Propeller combination for a boat propeller unit

A boat propeller drive with double, counter-rotating propellers is distinguished by the after propeller having one more blade than the fore propeller as well as a smaller diameter than the fore propeller.

Double propeller drive for boats

The invention relates to a rotor device, preferably a boat propeller device. The propeller shaft drives, via a planetary gear system, two propellers in the rotational direction of the shaft and one propeller counter to the rotational direction of the shaft. The propellers are dimensioned so that they absorb approximately equal torques.

Rotor device

An inboard outboard drive is at the housing portion passing through the hull provided for sealing and damped support, with a resilient element with a non-collapsible cross-sectional shape which is subject to a constantly acting compressing force, conveniently generated by the weight of the engine. When cracks occur in the resilient element, the edges of the cracks are pressed together by this compressing force, whereby penetration of water into the hull is prevented or at least rendered more difficult. The invention is suited for application in inboard outboard drives of the S-type as well as of the Z-type.

Inboard outboard drive and mounting therefor

A double propeller drive unit for boats having an inclined steering axis and a trim fin arrangement which is fixed to the cavitation plate of the drive unit, is disposed in the boundary region between the propellers, and is designed to balance torques acting on the drive unit.

Propeller drive unit for boats

An inboard outboard drive for boats, particularly planing boats, of the S-type comprising an inboard engine and a vertical propeller leg having an upper inboard end and extending through an opening in the hull to an outboard propeller carrying portion. The engine has a horizontal output shaft with a universal joint driving shafting extending through the propeller leg to drive the propeller. The propeller leg for side steering is pivotally mounted in a watertight bearing which is located inboard and is inclined so that the bearing axis, defining the side steering axis, passes through the universal joint. The drive is supported near its forward end on two vibration damping supports mounted in the hull and supporting the engine, and on a resilient damping member mounted in the hull and supporting the projecting portion of a bracket which supports the propeller leg to reduce the lever arm of the propeller thrust. The propeller leg is assembled from an inboard module and an outboard module each having power transmission shafting and having attachment member for securing the modules together and sealing the opening in the hull.

Inboard outboard drive

Transmission for boats

Combined transmission and propeller assembly for boats

An inboard outboard drive having a structural part which passes through an opening in the hull of a boat. A mounting shield for supporting the structural part is at its inner portion provided with symmetrical receiver grooves into which the support flanges on the structural part may be selectively inserted in either one of two reversed positions and has in an outer portion an asymmetrically located flange for securing to the hull. The shield may according to need be put on the inner or outer side of the hull, depending on which of them is more even than the other.

Growing community of inventors

Fjaras, Sweden

Lennart H Brandt