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. 02, 1988
Filed:
Mar. 23, 1987
Keith L Jackson, Creve Coeur, MO (US);
Richard B Polley, St. Charles, MO (US);
Dallas L Schmitt, Fairview Heights, IL (US);
GSI Engineering, Inc., St. Louis, MO (US);
Abstract
A railway vehicle truck in which the framing consists of sideframes resiliently supported at their ends on the axle bearings and a main frame supported on the sideframes by flat elastomeric pad devices inclined longitudinally of the truck and located at a substantially higher level than the levels of the neutral axes of the sideframe center portions and of the effective lateral reaction points of the resilient supports of the sideframes on the axles, the position and inclination of the pad devices being such that the horizontal component of the resultant force developed by each pad device on the respective sideframe lies along the neutral axis of the sideframe center portion whereby to place the center portion of the sideframe in tension rather than bending and thereby permit use of sideframes of extremely light construction, and separating lateral thrust means between the sideframes and main frame from the vertical springing function of the inclined pad devices to permit optimum placement of the lateral thrust means, i.e., in the region of the effective level of resilient support of the sideframes on the axles, thereby eliminating substantial lateral overturning moments on the sideframes which would otherwise occur if all lateral thrust between the main frame and sideframes were applied at the level of the inclined pads.