Paddle blade end with sidewalls form eccentric shaft

Details Paddle blade end with sidewalls form eccentric shaft Paddle blade end with sidewalls form eccentric shaft

2007-12-18

2007-12-18

Swinehart, Ed (Department: 3617)

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

Reexamination Certificate

active

11603468

ABSTRACT:
A foldable paddle blade and shaft comprises a planar elongate polymer plastic substrate with two angularly directioned weakened hinge lines (71) which extend inwardly and angularly from a location at or near one elongate end of the substrate's lateral edges to form a blade with sidewalls (46) and a free terminal end (30). Paralleling weakened hinge lines (72) parallel and traverse the at least three faceted tubular shaft (50),(51). In an alternative embodiment, additional paralleling weakened hinge lines (72),(73) and tabular projections (42) may form a four faceted or square shape tubular shaft (52). The paddle blade's three faceted or more eccentric tubular shaft's shape may be in a triangular, a square, or an open sided c-channel shape. A difference in axis between the paddle blade's planar axis and the shaft's elongate axis further strengthens the overall structure in at least one direction. The improvement is a flat substrate which can be easily and more conveniently stored within small areas of most any water craft before being foldingly assembled.

REFERENCES:
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patent: 1499490 (1924-07-01), Weil
patent: 1789749 (1931-01-01), Herring
patent: 2343726 (1944-03-01), Witt
patent: 3186714 (1965-06-01), Berendt et al.
patent: 4303402 (1981-12-01), Gooding
patent: 4622017 (1986-11-01), McGraw
patent: 4842482 (1989-06-01), Beckerer, Jr.
patent: D335274 (1993-05-01), Beckerer, Jr.
patent: 5830024 (1998-11-01), Killen
Disclosure Doc. # 603281.

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