Pneumatically operated graduated release valve for rail vehicles
US4775194A · kind A · utility
11Cited by
5References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1988 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Jan 15, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/54
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Passenger rail vehicle brake control valve apparatus includes, a control valve device of the type limited to direct release of the brakes, having service, emergency, and continuous quick service portions secured to a pipe bracket, and a graduated release valve portion governed jointly by brake cylinder pressure, brake cylinder exhaust passage pressure from the control valve device, and brake pipe pressure to at times modify output of the control valve device to provide for graduated control of the passenger rail vehicle brakes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.