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. 12, 2012
Filed:
Jul. 21, 2009
Richard A. Carlstedt, Wheaton, IL (US);
Rodney K. Chesley, North Aurora, IL (US);
Erik D. Jensen, Batavia, IL (US);
David M. Houck, Montgomery, IL (US);
Richard A. Carlstedt, Wheaton, IL (US);
Rodney K. Chesley, North Aurora, IL (US);
Erik D. Jensen, Batavia, IL (US);
David M. Houck, Montgomery, IL (US);
Miner Enterprises, Inc., Geneva, IL (US);
Abstract
A cold formed railcar spring including a spring pad formed from a perform of thermoplastic polyester elastomer having a durometer hardness ranging between about 40 and about 45 on the Shore D scale and sandwiched between a pair of metal plates. Each metal plate has a generally centralized bore extending therethrough and includes a plurality of radially spaced mechanical fasteners formed as an integral part of each plate. Each fastener has first and second generally parallel surfaces and a barb extending from a side of the fastener such that, upon axial compression of the preform, the fastener is pressed axially inward of one end of the perform such that the barb on the fastener mechanically interlocks with the spring pad whereby securing the plate to the spring pad.