Railway vehicle brake system with four-way valve
US4428622A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Aug 25, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86871
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A railroad vehicle brake system in which a four-way valve is used to control air flow in brake pipe sections and to the control valve which controls the air supplied to a brake cylinder. The four-way valve includes a housing and a rotatable operating member in the form of a truncated bolt with air channels therein which member can be rotated so as to selectively interconnect or cut-off the brake pipe sections and the control valve. The member has operating shafts integral with the bolt which extend from opposite sides of the housing. Multi-part seals are disposed in openings in the housing to which the brake pipe sections and the control valve are connected and have portions urged into contact with the bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.