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:
Mar. 20, 2012
Filed:
Aug. 13, 2009
Giuseppe Sammartino, Mount Prospect, IL (US);
Giuseppe Sammartino, Mount Prospect, IL (US);
Wabtec Corporation, Wilmerding, PA (US);
Abstract
A single-piece friction wedge for use in damping relative movement between a bolster and a side frame of a railroad car truck includes a generally horizontal bottom surface, a generally vertical front surface, and a back surface oriented at an acute primary angle with respect to the front surface. The back surface has first and second sloped surfaces which are angled toward each other. A damping system employing such a friction wedge includes a bolster pocket insert. The bolster pocket insert is configured to be at least partially received within a pocket of the bolster and has an inner face configured to engage the pocket of the bolster and an outer face configured to engage at least one of the first and second sloped surfaces of the back surface of the friction wedge.