Railroad spring wing frog assembly
US6276642A · kind A · utility
7Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L5/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A railroad trackwork frog assembly is provided with a base plate, a spring wing rail supported by and movable laterally relative to the base plate, and a hold-down subassembly attached to the spring wing rail and to the base plate, the hold-down subassembly comprising, in combination with a horn housing, a horn element having a cross-section area moment of inertia about a transverse horizontal axis intersecting the cross-section area center of gravity that is smaller than the cross-section area moment of inertia about a transverse vertical axis intersecting the cross-section area center of gravity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.