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Flap-type rotary abrasive device

  • US 4,258,509 A
  • Filed: 05/30/1978
  • Issued: 03/31/1981
  • Est. Priority Date: 05/30/1978
  • Status: Expired due to Term
First Claim
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1. An abrasive flap wheel comprising:

  • a plurality of abrasive leaves of a predetermined size having opposed faces and end edges, each leaf having abrasive particles bonded to at least one face, each of said leaves having opposed side edges, said end edges being parallel to each other and said side edges being parallel to each other, said plurality of leaves being formed into an annular array, having an inner surface formed by the end edges of said leaves facing radially inwardly;

    a first end cap centrally disposed about one side of said annular array and having an outer flange, the outer perimeter of the outer flange overlaps and is flush with one side of said side edges, said outer flange of said first end cap being continuous around the outer periphery of the flange and forming a groove facing said side edges, and said first end cap having an inner plug having an inner surface, said plug extending inwardly from said outer flange and forming a central aperture extending from said outer flange to said plug inner surface;

    a second end cap centrally disposed about the other side of said annular array and having an outer flange, the outer perimeter of the outer flange of said second end cap overlaps and is flush with the other side of said side edges, said outer flange of said second end cap being continuous around the outer periphery of the flange of said second end cap and forming a groove facing said other side edges, and said second end cap having an inner plug having an inner surface, said plug of said second end cap extending inwardly from said outer flange and forming a central aperture;

    said end caps and said inward end edges of said leaves defining a central cavity;

    a holding spindle, said spindle being aligned by and rigidly held secured within said first and second end cap central apertures;

    a solidified securing material, said material at least partially filling said cavity and completely filling said first and second end cap grooves and extending between each of the adjacent leaf side edges that abut said end cap grooves, said solidified securing material being the only means for bonding said leaves together and for maintaining the integrity of said flap wheel during rotation thereof while in use.

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