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US 4,434,738 AGranted
Rudder for watercraft
AssigneeJastram-Werke GmbH KG
InventorWolfgang K. W. Barkemeyer
Life of this patent
Estimating the term…
Abstract
The fin of a fin rudder can, as desired, be locked to the rudder (single-area rudder), to the ship (forced control of fin through movement of main rudder), or separately pivotable (independent fin movement), the locking or actuating device being positioned within the hull (FIG. 1).
Claims5
A rudder for a watercraft comprising a main rudder member;
- a hollow rudder shaft adapted to attach said main rudder member to a watercraft for pivotal movement of said main rudder member about a vertical axis with respect to the watercraft;
- a fin member;
- means for attaching said fin member to said main rudder member for pivotal movement of said fin member about a vertical axis with respect to said main rudder member;
- a pivotal yoke member attached to said hollow rudder shaft;
- means for pivoting said yoke member with respect to the watercraft;
- a torsion bar passing through said hollow rudder shaft and having a first end and a second end;
- means coupling said torsion bar first end to said fin member for pivoting of said fin member in response to twisting of said torsion bar;
- means coupled to said torsion bar second end for twisting said torsion bar;
- a first blocking member adapted for attachment to the watercraft;
- a second blocking member attached to said yoke member;
- and a locking member movable between a first locking position, in which said torsion bar is locked to said first blocking member permitting pivoting of said fin member with respect to said main rudder member, and a second locking position, in which said torsion bar is locked to said second blocking member preventing pivoting of said fin member with respect to said main rudder member.
8 more elements
Dependencies are inferred from the claim text.