Patent ID: 7762167
Filing Date: 2010-07-27
Classification: B62D,Y10T

Abstract:
1. A method of enlarging a kingpin, the kingpin being installed in a floor of a trailer for a tractor trailer arrangement and having an upper portion secured in the trailer, and base, shank, and head portions extending outside the trailer, with the head portion including a radially extending flange, comprising the steps of: providing a collar having base, shank, and head portions, with the shank having a desired diameter; and the collar including an internal aperture having a first portion of a certain diameter and a second portion of lesser diameter; machining in situ kingpin material from the base portion down to a dimension substantially equal to the first portion, and from the shank and the head portions of the kingpin down to a dimension substantially equal to the second portion of the internal aperture of the collar, thereby forming a kingpin stub; and joining the kingpin stub and the collar, resulting in a new kingpin having the desired diameter.