Bolster beam of railcar bogie
US11479275B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2019 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Jan 24, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61F5/52
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bolster beam of a railcar bogie includes a bolster beam main body in which a pair of auxiliary air chambers respectively communicating with a pair of air springs are formed; and a stopper structure projecting upward from a car width direction middle portion of the bolster beam main body. An upper wall of the bolster beam main body includes a middle upper wall portion at which the stopper structure portion is provided; and a pair of outside upper wall portions adjacently located at both respective car width direction sides of the middle upper wall portion and joined to the middle upper wall portion. The pair of outside upper wall portions include respective upward bent portions that are located at a car width direction middle side and bent upward toward the stopper structure portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.