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:
Jun. 24, 2008
Filed:
Aug. 12, 2005
John W. Rudibaugh, West Chester, PA (US);
Charles L. Van Auken, Carlisle, PA (US);
John W. Rudibaugh, West Chester, PA (US);
Charles L. Van Auken, Carlisle, PA (US);
ASF-Keystone, Inc., Granite City, IL (US);
Abstract
Split wedges biased against sloped upper surfaces and the side walls of pockets in the ends of the bolster of a rail car truck are provided with non-metallic wear plates which interface with pocket side walls to reduce or eliminate pocket side wall wear. The wear plates are typically cast polymeric pads selected from the group comprising nylon, Delrin, UHMW and urethane, have a hardness in the range of between about 700° and 900° and a sliding coefficient of friction of about 0.10 to about 0.30. The pads are mounted in recesses within the sidewalls of the wedges and are held in place by means such as threaded fasteners for ease of replacement.