Fail safe indicator for skid control system
US3936095A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1973 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Aug 24, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/4225
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicular skid control system for relieving the brake pressure when an incipient skid condition is sensed. The system includes a combined check and bleed valve that controls the flow of hydraulic actuating fluid from a master cylinder to the wheel brakes. An expansion chamber is positioned in the fluid circuit between the check and bleed valve and the wheel brakes. An ancillary source of fluid pressure, such as a power steering pump, normally holds the expansion chamber at a minimum volume condition and holds the check and bleed valve open for normal brake operation. When an incipient skid condition is sensed, the expansion chamber is permitted to increase in volume and the combination check and bleed valve is closed. Closure of the check and bleed valve isolates the master cylinder from the wheel brakes and prevents the application of further pressure to the wheel brakes. Expansion of the expansion chamber relieves the existing pressure in the wheel brakes to prevent skidding. A regulator is provided in the circuit connecting the source of ancillary fluid with the expansion chamber for maintaining at least a predetermined pressure in the circuit. The pressure maintained by the r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.