Patent ID: 6106232
Filing Date: 2000-08-22
Classification: B63H,B64C

Abstract:
A propeller structure comprising:a hub defining a hub axis and a hub plane substantially perpendicular to said hub axis, said hub being configured for attachment to a propeller shaft for rotation about said hub axis;at least first and second planar blades attached to and extending substantially radially from said hub, said planar blades being inclined at an angle of A.degree. with respect to said hub plane;each of said planar blades defining a surface having a periphery including a substantially straight leading edge and a substantially straight trailing edge, said leading and trailing edges diverging with increasing radial distance from said hub axis and terminating in an arcuate outer edge; and whereinsaid blade trailing edges are positioned substantially coincident with said hub plane;said blade leading edges are oriented at said angle A.degree. with respect to said hub plane whereby points along said leading edges are axially displaced from said trailing edges to impart an axial component to fluid moving across said blade surfaces; and said blade leading edges are oriented so that a straight line extension thereof substantially intersect said hub axis.