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US 4,284,025 AGranted
Rudder arrangement for ships
AssigneeHowaldtswerke-Deutsche Werft Aktiengesellschaft Hamburg und Kiel
InventorKlaus Eckhard
Life of this patent
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Abstract
A rudder arrangement for ships comprises a rudder blade having a horizontal ivision to form an upper and a lower rudder blade. Each rudder blade is controllable as a separate rudder blade via a rudder shaft and an associated rudder machine.
Claims5
A ship comprising:
- (a) a hull including a stationary rudder horn extending downwardly, said horn having a substantially horizontal bottom edge, a substantially vertical rear edge and a portion extending rearwardly adjacent said bottom edge of said horn;
- (b) an upper rudder blade extending rearwardly from said rudder horn, the forward end thereof being positioned between said hull and said rearwardly extending portion;
- (c) first means mounting said upper rudder blade for pivotal movement about an axis extending between said hull and said rearwardly extending portion;
- (d) a lower rudder blade positioned below said rudder horn;
- (e) second means mounting said lower rudder blade for pivotal movement about an axis passing through said horn;
- (f) said axes being non-coincident;
- and
- (g) first and second drive means for pivoting said upper and lower rudder blades respectively independently of each other;
- (h) whereby the steering capability of said ship is maintained in the event one of said mounting means is inoperable.
6 more elements
Dependencies are inferred from the claim text.