Electro-pneumatic spring and service brake actuator
US5118165A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Jan 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/083
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electro-pneumatic braking system includes a tandem brake actuator including a service brake actuating section and an emergency/parking spring actuated section. Hold-off pressure is communicated to the emergency/parking section through a three-way solenoid valve from a pressure reservoir, and communication to the service actuator is controlled by an electro-pneumatic modulator. Service pressure is taken both from the branch of the conduit communicating with the air reservoir, and from the hold-off pressure in the emergency/parking reservoir. Accordingly, only a single line communicates fluid pressure from the reservoir to the brake, and service brake response time is improved because the hold-off pressure and the emergency/parking section of the actuator is used as a small reservoir immediately adjacent the service actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.