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:
Feb. 20, 1990
Filed:
Dec. 01, 1988
Applicant:
Inventors:
Eugene T Fehrenbach, Matteson, IL (US);
Joseph W Lam, Chicago, IL (US);
Assignee:
Thrall Car Manufacturing Company, Chicago Heights, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61F / ; B60P / ;
U.S. Cl.
CPC ...
105183 ; 410 45 ; 105228 ;
Abstract
A span bolster, for carrying a heavy load of a railroad car body and distributing the load to two four wheel two axle railroad bogies or trucks, is fabricated from steel plate and has top and bottom cover plates, top and bottom reinforcement doubler plates, longitudinal spaced apart webs separating the cover plates, body bolsters at each end and a central truck bolster, all formed of metal plate joined together by welding with all critical welds being full penetration welds, and with the span bolster being stress relieved after fabrication.