Handbrake operating linkage for multi-unit rail cars
US4905795A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1989 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jan 25, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20486
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved single manual brake operating system for connecting the brake equipment of a plurality of wheeled railroad freight car trucks. The system provides for initial rapid takeup of slack in the linkages interconnecting the braking mechanisms for several trucks and thereafter supplies force with a greater mechanical advantage as the brake shoes are forced against the wheels of the railway car. This variably applied take-up force is accomplished using a system of noncircular sheaves to which flexible portions of the handbrake operating linkage are attached in such a manner that initial rotation of the take-up sheave provides a relatively long effective lever arm to take up slack in the interconnecting linkages, and thereafter provides a shorter effective lever arm for application of tension through the interconnecting linkages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.