Patent ID: 8356556
Filing Date: 2013-01-22
Classification: B21L

Abstract:
1. Cart drive dog chain apparatus comprising universal inside attachment links having relatively thick portions and relatively thin portions, filler attachments for connecting to the thin portions of some of the universal inside attachment links, and pusher attachments for connecting to the thin portions of other of the universal inside attachment links, wherein the universal inside attachment links comprise generally rectangular blocks having center sections of reduced height between two end sections, wherein the filler attachments comprise a generally rectangular blocks for fitting in the central sections of the universal inside attachment links and connecting therein with upper surfaces of the filler attachments level with upper surfaces of the end sections of the universal inside attachment links, wherein the central sections have spaced bored and tapped holes and the filler attachments have complementary bored and counterbored holes aligned with the tapped holes in the central sections and further comprising machine screws inserted through the counterbored holes in the filler attachments and threaded in the tapped holes in the central sections of the universal inside attachment links and holding the filler attachments in the central sections.