Drag chain

F - Mech Eng,Light,Heat,Weapons – 16 – G

Patent

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59/13

F16G 13/18 (2006.01)

Patent

CA 1068489

Abstract A chain particularly useful for draglines in various type strip mining operations is disclosed. The chain is made up of individual, separate- ly assembled links of generally a U-shape having spaced pin lugs at one end. The lugs have aligned pin eyes for holding a pin between them, which is received generally flush with the outside surfaces of the lugs. To prevent pin rotation and to prevent oblong wear in the pin eyes, the pin and the eyes have a flat surface on the side toward the open end of the U-shaped link. With the pin installed in the eyes, a roll pin is press fit through one lug and through that end of the pin to retain the link pin in place. Openings in the lug are oblong shaped, so that some forward and backward movement of the link pin is permitted and the roll pin is never put in a shear situation. The link units are assembled at 90° to one another, with a pin of one link passing through the next link. The body of the link may be of a more wear- resistant material than the pin so that the easily replaceable pin wears out first.

307408

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