Railroad car hand brake signal device
US4296707A · kind A · utility
18Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1980 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Feb 13, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/228
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A railroad car hand brake signal device alerts a train crew when a rail car hand brake is set and air is supplied to the brake pipe during operation of the train. If a rail car hand brake remains applied when air is supplied to the train's brake pipe, a whistle is sounded to enable the crew to identify the car having a set hand brake and a leakage path is provided to cause the air pressure in the brake pipe to fall to alert the train crew in the locomotive that a hand brake is set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.