Oscillating-foil type underwater propulsor with a joint

Details Oscillating-foil type underwater propulsor with a joint Oscillating-foil type underwater propulsor with a joint

2008-10-09

2010-06-29

Olson, Lars A (Department: 3617)

Marine propulsion

Oscillating propelling means

Fishtail motion propelling means

C440S021000

Reexamination Certificate

active

07744434

ABSTRACT:
An oscillating-foil type underwater propulsor with a joint provided in the invention, the propulsor including a streamline foil having a foil surface being parallel to a water surface and a span length of at least twice as long as an average chord length of the streamline foil, and a heaving mechanism undergoing heaving motion perpendicular to a propulsion direction of the propulsor and having a transmission section, wherein the transmission section is pivotally connected to the streamline foil to form a joint, the joint being provided at the middle of the span length and having a rotation center located within a circular area, which has a radius of one third of the average chord length and is centered at the point one third of the average chord length ahead of the lifting center of the streamline foil.

REFERENCES:
patent: 3833956 (1974-09-01), Meehan
patent: 4025977 (1977-05-01), Cronin
patent: 4102293 (1978-07-01), de la Roche Kerandraon
patent: 4767368 (1988-08-01), Ciccotelli
patent: 5401196 (1995-03-01), Triantafyllou et al.
patent: 7198529 (2007-04-01), Cleary

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