Tractor air brake system and control valve means therefor
US4455052A · kind A · utility
10Cited by
3References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1981 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Aug 7, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/263
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A tractor air brake system including front wheel brake actuators, rear wheel brake actuators, and control valve structure for controlling the service air pressure delivered to the front wheel brake actuators. When a tractor is equipped with this brake system, the control valve structure operates to vary the service air pressure delivered to the front wheel brake actuators relative to that delivered to the rear wheel brake actuators in order to minimize tractor front wheel lock and loss of steering control when operating a tractor-trailer combination and to provide safe stopping when operating the tractor only.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.