Blades for paddles and oars

Details Blades for paddles and oars Blades for paddles and oars

1997-08-28

1998-12-08

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Operator supported manually actuated type

Fulcrum support type

B63H 1606

Patent

active

058460535

ABSTRACT:
A blade for a paddle or an oar having a shaft and a paddling surface provided at a foremost end of the shaft, for enhancing paddling efficiency. The blade includes locking means provided on the paddling surface for locking water when the paddle or oar is operated with the shaft, the locking means comprising a plurality of circular, elliptical or polygonal hollows formed and arranged on the paddling surface in rows or in a grid pattern, each of the hollows having an area of 1/100 to 1/50 of an area of the paddling surface.

REFERENCES:
patent: 923945 (1909-06-01), Chaussinand
patent: 1786451 (1930-12-01), Ribard

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