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:
Aug. 01, 1978
Filed:
Nov. 26, 1976
James C Hammonds, St. Charles, MO (US);
Jan D Holt, St. Charles, MO (US);
ACF Industries, Incorporated, New York, NY (US);
Abstract
A railway car truck assembly having an integral H-frame includes longitudinally extending side frames integrally attached to a transverse member having a center bearing. The side frames are resiliently mounted for rocking movement on truck journal boxes. The side frames each include a constant contact side bearing adapted to take the weight of the car body. Each side bearing has an upper surface made of a first low friction material. A car body located above the truck pivots about the center bearing and includes laterally spaced depending portions having a lower surface made of a second low friction material supported on the side bearings. One of the first and second low friction materials includes filled nylon and the other low friction material includes filled polytetrafluoroethylene. The coefficient of friction between the first and second low friction materials is sufficiently low to allow relative rotation between the truck and car body.