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. 17, 1981
Filed:
Jul. 16, 1979
Applicant:
Inventors:
James M Kemper, Park Forest, IL (US);
Lynn K Tilly, West Chicago, IL (US);
Assignee:
AMSTED Industries Incorporated, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B61F / ; B61F / ; B61F / ;
U.S. Cl.
CPC ...
1051 / ; 267 / ;
Abstract
An improved railway truck friction shoe is provided. The contact point of the shoe slope face with the bolster and the spring center line of the shoe are substantially coincident; the contact point is substantially equidistant from the top and bottom edges of the shoe column face. The convex sloped surface of the shoe has a reduced crown radius, and the vertical face of the shoe has an increased length. The shoe is designed to provide a more even distribution of contact pressures across its column face. This results in a longer wear life for the shoe by providing for more uniform wear.