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:
Jul. 20, 1993
Filed:
Jul. 10, 1992
Robert D Woolston, Portland, OR (US);
Gunderson, Inc., Portland, OR (US);
Abstract
A low friction, high wear rail car center plate assembly of the type where a cylindrical center plate boss having a planar bottom surface and a perpendicular side wall rides rotationally in a mating bowl in a truck bolster, includes a boot which closely overlies the center plate boss, and axial and radial wear structures which fit within the bowl, so that the boot abuts the wear structures. The wear structures are preferentially formed of a composite bearing material, having an inner acetal resin surface, and the boot has a hard, highly polished surface. The boot includes an elastomeric or metallic seal ring cover that extends over the bowl and prevents foreign matter from getting between the bowl and the wear structures.