Marine propulsion – Oar or paddle
Patent
1999-03-18
2000-03-28
Avila, Stephen
Marine propulsion
Oar or paddle
416 74, B63H 1604
Patent
active
060424389
ABSTRACT:
The invention is an ergonomic canoe paddle. The paddle includes a shaft having a shear side and an opposed drag side, a blade having a shear surface and an opposed drag surface, wherein the blade is secured to a bottom end of the shaft so that the shear surface of the blade is secured to the shear side of the shaft and the drag surface of the blade is secured to the drag side of the shaft, and a handle secured to a top end of the shaft. The handle includes a central grip bar secured to the top end of the shaft, a right grip stem and a left grip stem secured to opposed ends of the grip bar. The right and left grip stems extend away from the shaft in a direction that is both about twenty degrees from a plane perpendicular to a longitudinal axis of the shaft, and that is also away from the drag side of the shaft about sixty-five degrees from a plane roughly parallel to the shear surface of the blade. The right and left grip stems are dimensioned to receive a user's grip so that when a user wraps a hand around either right or left grip stem, the blade is disposed in an angular alignment that compensates for non-linear thrust of the paddle as the shear surface of the blade shears water to propel a canoe through the water.
REFERENCES:
patent: D343608 (1994-01-01), Nazara
patent: 1648354 (1927-11-01), Lied
patent: 2709493 (1955-05-01), Hupp
patent: 3324490 (1967-06-01), Jewett
patent: 3330245 (1967-07-01), Klabunde
patent: 3970032 (1976-07-01), Phillips
patent: 4133285 (1979-01-01), Phillips
patent: 4303402 (1981-12-01), Gooding
patent: 4664637 (1987-05-01), Loerch
patent: 4673361 (1987-06-01), Harvey
patent: 4701142 (1987-10-01), Merritt
Avila Stephen
Chisholm, Jr. Malcolm J.
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