Coldworked joint held by seamless tubular member

Claim 1

A joint construction including: a plurality of work pieces defining holes therethrough generally axially aligned; and, a tubular member within said holes, said tubular member including a seamless cylindrical side wall defining a common central passage therethrough having a substantially constant diameter along its length, said side wall further comprising a major section and a minor section positioned end-to-end with said major section, said major section having a substantially constant major outside diameter along the length of said major section and said minor section having a substantially constant minor outside diameter along the length of said minor section, said minor diameter being a final prescribed amount smaller than said major diameter, said tubular member having less rebound upon enlargement than the material of said work pieces, and said side wall having been enlarged a substantially constant enlarged amount along its length to cause said major and minor sections to be enlarged into contact with said work pieces within said holes and enlarge said holes from an initial substantially constant hole diameter along the length of said holes to said major outside diameter and said minor outside diameter where said major section has been enlarged said prescribed enlarged amount from a first initial outside diameter smaller than said initial hole diameter to said major outside diameter and where said minor section has been enlarged said prescribed enlarged amount from a second initial outside diameter smaller than said first initial outside diameter of said major section by said final prescribed amount to said minor outside diameter larger than said initial hole diameter so that the portion of said holes aligned with said major section is enlarged more than the portion of the holes aligned with said minor section by said final prescribed amount.