Sculling oar

Marine propulsion – Oar or paddle – Articulated sectional oar or paddle

Reexamination Certificate

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Reexamination Certificate

active

10538460

ABSTRACT:
An object is to provide a Ro-scull which can suppress a decrease in thrust force by water resistance generated during turn-over operation and can realize high-speed cruise of a boat. The Ro-scull has a Ro-arm1and a Ro-blade2having a flat part12perpendicular to the Ro-arm1. The Ro-arm1is attached to an upper end portion of the Ro-blade2from an obliquely lower side. Namely, the Ro-arm1and the Ro-blade2are joined to each other while the Ro-arm1“receives” the Ro-blade2. A Ro-handle3is arranged not on the upper surface side but on the lower surface side of the Ro-arm1.

REFERENCES:
patent: 2213538 (1940-09-01), Whitehead
patent: 2696797 (1954-12-01), Whidden
patent: 3086492 (1963-04-01), Holley
patent: 6938567 (2005-09-01), O'Donnell
patent: 4227198 (1994-02-01), None
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patent: 49-134096 (1974-12-01), None
patent: 62-141599 (1987-09-01), None
patent: 7-52883 (1995-02-01), None

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