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. 23, 1981
Filed:
Oct. 15, 1979
Otto W Neumann, Itasca, IL (US);
James A Henkel, Park Forest, IL (US);
AMSTED Industries Incorporated, Chicago, IL (US);
Abstract
A friction shoe particularly adapted for providing improved regulation of movement between a bolster and a side frame of a railroad car truck includes a central body portion and triangular-shaped wings formed on each side thereof. Pairs of these friction shoes are disposed in pockets formed at the ends of the bolster which in turn are resiliently carried in a window formed in each side frame. Each friction shoe wing has a downwardly and outwardly sloped wear surface to form a convex-like seating area. In turn, each bolster pocket has complementarily formed friction surfaces providing a concave-like receiving area. During operation of the truck, the shoe seating area interacts with the bolster pocket receiving area to produce a wedging action. This wedging action in turn insures improved frictional regulation of side frame-bolster movements and maintains such in an aligned relationship.