Buffing ball made of compressible material

  • US 7,669,939 B2
  • Filed: 03/10/2005
  • Issued: 03/02/2010
  • Est. Priority Date: 12/03/2003
  • Status: Active Grant
First Claim
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1. A method of making a rotary driven surface finishing ball of compressible material, comprising the steps of:

  • forming a body of compressible material from multiple disk-like layers separated at least partially from an outside surface radially inwardly in planes generally perpendicular to a rotational axis, slitting said layers on circumferentially spaced planes extending generally radially from said outside surface of said layered body to define a plurality of fingers, and compressing and holding a center portion of said layered body in a direction along said axis such that the uncompressed outer ends of said fingers define a generally spherical ball,said compressing and holding step including;

    inserting a stud threaded along its full length and having a driving head on one end along said axis through the layered body from one outer surface,pressing a bearing head having a threaded connector along the rotational axis from an opposite outer surface toward the threaded stud, threadably engaging the stud to adjustably compress the layers between the driving head and the bearing head; and

    ,continuing the threadable engagement of the bearing head toward the driving head until a level of compression is attained that is sufficient to hold the layers in the compressed state as a generally spherical ball, transmit the necessary drive torque to the ball, and prevent movement between the layers or between a layer and one of the heads.

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