Oar with pivotal blades

Details Oar with pivotal blades Oar with pivotal blades

2011-04-12

2011-04-12

Olson, Lars A (Department: 3617)

Marine propulsion

Oscillating propelling means

Having nonpropelling cycle segment

Reexamination Certificate

active

07922549

ABSTRACT:
An oar or paddle for moving forward and backward any kind of vessel through the water comprising two parallel lattices fixed at a given distance from each other and a frame moving between lattices. The frame has a multitude of parallel grooves of circular cross-section which pivotally support a multitude of plates. The plates are located axially of the grooves by the portion of the plates disposed within the groove. The grooves have a peripheral extent which permits the plates to rotate. The frame is connected with vessel's mode of movement backward or forward controller. Lattices are connected with vessel's engine.

REFERENCES:
patent: 9366 (1852-11-01), Kellsey
patent: 80960 (1868-08-01), Hunter
patent: 233209 (1880-10-01), Coulter
patent: 461067 (1891-10-01), Ainslie
patent: 791852 (1905-06-01), Worcester
patent: 1208063 (1916-12-01), White
patent: 1828983 (1931-10-01), Rawlings
patent: 2507205 (1950-05-01), Griffin
patent: 2873713 (1959-02-01), Baastrup
patent: 3122122 (1964-02-01), Jenkins
patent: 7520788 (2009-04-01), Gonzalez

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