US Patent 8683842 Railroad spikes and methods of making the same

Patent 8683842 was granted and assigned to Norfolk Southern Corporation on April, 2014 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Norfolk Southern Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

8683842

Patent Inventor Names

Hayden W. Newell0

Date of Patent

April 1, 2014

Patent Application Number

13069883

Date Filed

March 23, 2011

Patent Primary Examiner

‌

Shelley Self

Patent abstract

Embodiments of the present invention are directed to improved designs of railroad spikes and improved methods of manufacturing the same. According to one exemplary embodiment, a method for manufacturing a railroad spike may comprise the steps of: preparing a metal blank having a substantially circular cross-section; subjecting the metal blank to at least one cold heading process and at least one cold extrusion process to form a railroad spike having (a) a circular head with a fillet at its bottom side that is angled to engage a railroad tie plate or rail base and (b) a non-threaded shank with a substantially square cross-section and a chiseled tip; and coating the railroad spike with an anti-corrosion material.