Rectifier and oar

The oar's commutator design stabilizes water flow and reduces sinking and resistance by protruding from the blade with an inclined tip, improving oar operation in boat racing.

WO2026126500A1 Publication Date: 2026-06-18KUWANO BOATS CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
KUWANO BOATS CO LTD
Filing Date
2024-12-13
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Operating an oar in boat racing can be difficult due to the skill of the rower and the condition of the water surface, leading to challenges such as the blade sinking into the water and increased resistance.

⚗Method used

The oar is equipped with a commutator fixed to the blade that protrudes from the surface or back with an inclined tip, designed to stabilize water flow and reduce vortex generation, enhancing the oar's operation by minimizing sinking and resistance.

🎯Benefits of technology

The commutator configuration reduces the likelihood of the blade sinking and decreases water resistance, making it easier to operate the oar by generating lift forces and minimizing vortex formation.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided are: a rectifier that facilitates operation of an oar; and an oar that comprises the rectifier.　Provided are long and narrow rectifiers 1 that are fixed to a blade 100 of an oar 200 and rectify the flow of water, the rectifiers 1 being characterized by protruding from a front surface 101 of the blade 100 and being fixed so that the tip side thereof is inclined upward. Provided also are rectifiers 2 that are characterized by protruding from a rear surface 102 of the blade 100, and are fixed so that the tip side thereof is inclined downward. Furthermore, in a longitudinal cross section, the projection length L1 from the blade 100 most protrude on the lower side than the middle, and is greatest in the middle and gradually decreases toward both outer sides in the longitudinal direction. An upper surface 11 formed on the upper side is inclined with respect to the blade 100 and has an arch shape projecting upward as seen in the vertical direction of the blade 100.
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