A propulsive device for watercraft, for example an oar or a paddle, includes a handle 2 for pulling and pushing at least one blade, through water adjacent to the watercraft to create propulsive force. The device further comprises a blade 1 and an attachment means for attaching the blade to an end of the handle such that the blade is held at a predetermined angle of between 60 and 120 degrees relative to a reference line running through the long axis of the handle when measured in a vertical plane coincident with said reference line. The blade is additionally held orthogonal to the reference line when measured in a second plane coincident with said reference line and set at 90 degrees to said vertical plane. The device may comprise additional blades, vertical fins 3. The device may be disassembled, folded , have an adjustable length to enable storage. The device may have a cranked, or offset handle or incorporate additional buoyancy means.
Propulsive device for watercraft
2025-01-08
Patent
Electronic Resource
English
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |
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