Knuckle formed from pivot pin and kidney core and isolated finger core
US8201613B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2009 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Aug 31, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/103
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing a railcar coupler knuckle includes providing cope and drag mold portions having internal walls defining at least in part perimeter boundaries of a knuckle mold cavity; positioning a first internal core within either the cope mold or the drag mold portions, the first internal core configured to define a kidney cavity and a pivot pin hub as a single void within the knuckle; positioning a second internal core within either the cope mold portion and the drag mold portion, the second internal core configured to define a finger cavity; closing the cope and drag mold portions with the two internal cores therebetween; and at least partially filling the mold cavity with a molten alloy, the molten alloy solidifying after filling to form the knuckle, wherein the first internal core defines the kidney cavity and the pivot pin hub of the coupler knuckle, and wherein the second internal core defines the finger cavity of the knuckle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.