Front facing rowing apparatus
OwnerRonald R. Rantillainventor
Life of this patent
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Abstract
Apparatus for propelling a boat in the direction in which the oarsman is facing using oars which are connnected to a support (80) at their innermost ends (18) so that they are movable rotatably in a horizontal plane, rotatably in a vertical plane and linearly up and down, and which are suspended above the water by a downward force from a compression spring (66) applied at a point inboard of a fulcrum (74) which is attached to the oar connection joint clevis (46) and which is supported by a horizontal bearing surface (72) on which the fulcrum (74) slides as the oar is moved.
Claims6
A means for propelling a boat comprising, in combination:
- (a) an oar;
- (b) a support;
- (c) a means of connecting said oar to said support, permitting movement of said oar pivotally in a substantially horizontal plane;
- pivotally in a substantially vertical plane and linearly substantially upward and downward;
- (d) a fulcrum means located between the vertical pivot axis and the outboard end of said oar;
- (e) a substantially horizontal bearing surface which supports said fulcrum means;
- (f) a means of applying substantially downward force inboard of said fulcrum, causing lift on the outboard end of said oar.
An oar comprising:
- (a) a blade;
- (b) an outboard shaft;
- (c) a handle;
- (d) an inboard shaft;
- (e) a means of connection said inboard shaft to a support;
- wherein said outboard shaft and said inboard shaft are arranged to have their centerlines coaxial, and having said handle arranged between said outboard shaft and said inboard shaft and inclined away from said outboard shaft such that the centerline of said handle is offset from the centerline of said outboard shaft and forms an angle of approximately 30 degrees with the centerline of said outboard shaft, and having said blade at the outboard most end of said outboard shaft;
- whereby the torsion caused by said handle being off-center tends to rotate said oar in the correct direction for power stroke or feathering stroke.
Dependencies are inferred from the claim text.