Railcar primary suspension
US8297199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2011 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F1/38
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A railcar primary suspension is configured to couple an axle box to a truck frame by a coupling mechanism. The coupling mechanism includes: a radius arm including a tubular part which has openings at both sides thereof; a shaft inserted into the tubular part and provided with projecting portions formed at both side surfaces of the shaft; a pair of receiving seats including fitting grooves in which the respective projecting portions are fitted; cover members configured to support the respective projecting portions; and fastening members configured to fix the cover members to the respective receiving seats. A portion of each fitting groove and a portion of the corresponding projecting portion, the portions contacting each other, respectively have arc surfaces, and a portion of each projecting portion and a portion of the corresponding cover member, the portions contacting each other, respectively have flat surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.