Title: Steering arrangement at inboard-outboard drive unit

What I claim is:

1. An assembly for steering a boat equipped with a propulsion device in the form of an inboard-outboard drive (10), to which the propulsive power from the engine is transmitted by a universal joint (16) to the gearbox (22) of the inboard-outboard drive and from there to an underwater housing (26), to which the propeller (34) is attached, and where the gearbox (22) and underwater housing (26) can be tilted vertically in relation to the stern (12) of the boat, and the gearbox (22) is arranged as not to be horizontally pivotal relative to the stern (12) of the boat, while the underwater housing (26) is horizontally pivotal relative to the gearbox (22) by means of a steering gear (44-56) acting between the gearbox (22) and the underwater housing (26), characterized in that the steering gear comprises a first actuated gear (50) meshing with two outer gears (52, 54), one on each side of said first gear (50), said first gear and two outer gears being located in the gearbox (22), and that at least one of said outer gears (52, 54) meshes with a toothed circular segment (56) having a length which covers an angle of about 90° so as to allow a steering deflection of about 180°, the toothed segment (56) being located in the underwater housing (26).

2. The assembly as defined in claim 1, wherein said first gear (50) is located on the same shaft (48) as a worm gear (46), driven by a worm screw (44) operated by a hydraulic motor (42).

3. The assembly as defined in claim 1 or 2, wherein the toothed segment (56) meshes with both the outer gears (52, 54) when the steering gear is in a straight-ahead position.


Other info:


Inventors: Johansson, Donald (Alta, SE)

Application Number: 06/345730
Filing Date: 1982-02-04
Publication_date: 1984-02-21
Assignee: LINDQVIST VERKSTADS AB (SE)

Primary Class(es): 440/60 440/58
Other Classes: B63H5/13
US Patent Ref:

1339454	May, 1920	Hall	74/498	Gear reduction and lock for steering apparatus
1689962	October, 1928	Peck	440/55	Propelling mechanism for boats
2114633	April, 1938	Hedges	440/55	Motor boat drive and steering mechanism
2912955	November, 1959	Leipert	440/55	Combined cavitation plate and trim tab assembly
3946698	March, 1976	LaFollette et al.	440/61	Inboard-outboard drive for marine vessel

Other Refs: GB1424of

December, 1861

440/59

Primary Examiner: Blix, Trygve M.
Assistant Examiner: Corl, Rodney
Attorney: