Hydraulic servo-assisted braking system for motor vehicles
US4203631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1979 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Jan 3, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/161
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic servo-assisted braking system for motor vehicles has a master cylinder controlling two independent braking circuits through respective auxiliary cylinders each having an auxiliary piston with a central bore and an associated servo-piston with a stem which closes the said bore upon displacement of the servo-piston by hydraulic fluid pressure of source circuit, separable from the master cylinder, applied to the servo-piston through a common interception valve which is opened to admit the source pressure to the servo-pistons upon movement of either or both of a pair of pistons in a modulator cylinder subjected to the respective hydraulic pressures in the two brake actuator circuits. Failure of one of the braking circuits allows the other to remain operative, while damage to the servo-cylinders allows braking to remain effective through the master cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.