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Gliding ring

  • US 4,560,358 A
  • Filed: 05/10/1984
  • Issued: 12/24/1985
  • Est. Priority Date: 05/10/1984
  • Status: Expired due to Term
First Claim
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1. A gliding ring comprising;

  • a closed-figure airfoil having a planform comprising;

    an upper and lower surface,a central opening,an inner perimeter encompassing said central opening,an outer perimeter encompassing said inner perimeter,an axis of revolution which is substantially normal to the planes described by said inner and outer perimeters,said airfoil having a cross-section comprising;

    a line defining said lower surface,a convex line defining said upper surface, said convex line reaching a zenith which is the highest point on the airfoil section of said ring,a separator lip on said upper surface and located on or near said outer perimeter,said separator lip extending to a narrow peak which is higher than the immediately adjacent portion of said upper surface.

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