Seal assembly manufacturing methods

  • US 7,267,602 B2
  • Filed: 04/18/2005
  • Issued: 09/11/2007
  • Est. Priority Date: 03/29/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method comprising steps of:

  • providing a piston ring, which is severed forming an end gap;

    providing a lapper having a top plate and an opposing bottom plate having a central rotated shaft and an outer perimeter edge;

    providing a carrier disposed on the bottom plate meshingly interacting with the outer perimeter edge and the central shaft of the bottom plate, the carrier supporting a spacer;

    disposing the piston ring into the carrier locating the spacer at the end gap;

    bringing the top plate into a working relationship with the bottom plate sandwiching the carrier and the piston ring therebetween; and

    rotating the top plate, in which rotation of the top plate imparts rotation to the carrier and orbital movement of the carrier over the bottom plate about the rotated shaft and the spacer located at the end gap prevents the piston ring from rotating relative to the carrier.

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