Knuckle formed from pivot pin and kidney core and isolated finger core
US8646631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2012 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | May 8, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/103
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A railroad coupler knuckle includes a single, solid rib at a horizontal centerline of the knuckle that passes through a pivot pin hub thereof. The single, solid rib extends generally from a flag hole of a finger cavity of the knuckle to an opposite side of the knuckle from the flag hole. In another aspect, a railcar coupler knuckle includes a tail section, a hub section, and a nose section. The tail, hub, and nose sections define internal cavities including (i) a combined void that defines a pivot pin hub cavity and a kidney cavity and (ii) an isolated finger cavity. The combined void is formed using a first internal core during manufacturing of the coupler knuckle. The isolated finger cavity is formed using a second internal core during manufacturing of the coupler knuckle, such that molten alloy substantially separates the combined void and the isolated finger cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.