Apparatus for railway freight car coupler knuckle
US7497345B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2006 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Apr 7, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61G3/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In combination with a railway freight car coupler. A coupler has a knuckle side, and includes a knuckle, knuckle pin, and an apparatus for automatically pivoting and maintaining the knuckle full open position. The improvement comprises a coiled torsion spring which is capable of continuously exerting a predetermined force. A sleeve in combination with a flange is secured to the bottom end of the knuckle pin for attaching the torsion spring onto the coupler head. A support member is attached to the knuckle and cages one arm of the torsion spring which exerts a continuous force on the knuckle to rotate and maintain the knuckle full open position. A compression spring may be employed in place of the torsion spring in combination with a locking mechanism which, rigidly secures the knuckle and knuckle pin therebetween to prevent independent movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.