Direct support frog assembly
US5653408A · kind A · utility
3Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1996 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Apr 18, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B7/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A direct support type of rigid railbound railroad trackwork frog assembly is provided with a core frog casting, a pair of compliant, non-metallic spacer elements contacting laterally opposed sides of the core frog casting, a pair of wing rails respectively contacting the compliant, non-metallic spacer elements, and a threaded bolt and nut fastener joining the casting, spacer elements, and wing rails into a rigid unitary structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.