Method and apparatus for making galvanized upper coupler assembly

摘要

A method of making a galvanized upper coupler assembly for use in a trailer and the corresponding upper coupler assembly apparatus is disclosed. The method comprises the steps of providing a frame, covering at least one area of the frame with a mask, galvanizing the portions of the frame that are not covered, removing the mask, providing a kingpin, and attaching the kingpin to the frame. After attachment of the kingpin to the frame, the combined assembly can be coated with a rust resistant coating if desired, a cover plate can be attached to the frame, over the kingpin.

主权项

1. An upper coupler assembly of a semi-trailer for use with a lower coupler assembly of a tractor, comprising:
a frame including a wall having an upper surface, a lower surface, and an aperture extending therethrough; and a kingpin received in the aperture and extending beyond the lower s ace of the wall, wherein the lower surface of the wall is substantially covered with a galvanizing coating, leaving a lower surface area of the lower surface uncovered by the galvanizing coating, wherein the lower surface area extends radially outward from the aperture so that the lower surface area has substantially the same dimensions as a top surface of the lower coupler assembly of the tractor, and wherein the lower surface area is coated with a rust preventative coating.