Emergency portion for brake control valve
US4045095A · kind A · utility
3Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1976 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jun 25, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/42
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An upgraded railway freight car brake control valve device comprises a novel emergency valve portion that embodies therein a plurality of simple and inexpensive poppet valves that replace yet perform the same functions heretofore performed by more expensive slide type valves which slide valves, and the flat seats upon which they slide as they are shifted from one position to another, in their manufacture require a considerable amount of accurate machining thus increasing the cost of the valve device of which they are an important part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.