The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1996
Filed:
Feb. 02, 1994
Richard L Jones, Bloomingdale, IL (US);
William K Doyle, Coshocton, OH (US);
Gerald L Farrell, Coshocton, OH (US);
Frank R Hueske, Coshocton, OH (US);
Standard Car Truck Company, Park Ridge, IL (US);
Abstract
A process for making steel wear plates for use as railroad car truck side frame/bolster damping components utilizes the sequential steps of heating, pressing, quenching and then tempering. The heating process includes bringing the wear plate to a temperature of approximately 1750.degree. F. so that the plate is essentially 100 percent austenite. Generally uniform pressure is applied to the plate while heated to bring the plate to a desired flatness. Quenching fluid is thereafter applied to the flattened plate, while maintaining pressure thereon, to bring the plate to a predetermined brinnell hardness, a predetermined temperature, and a metallurgical characteristic of at least 90 percent martensite. The plate is thereafter tempered at a temperature of from 910.degree.-940.degree. F. for a period of time sufficient to bring the plate to a brinnell hardness less than the hardness after quenching.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile