Pressure modulating valves for braking systems
US4299426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Nov 2, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/101
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A dual pressure modulating valve unit for a motor vehicle braking system has two identical valves arranged side-by-side in a common housing, each valve being for inclusion in separate sub-systems of a split braking system. The valves are of the pressure limiting or pressure reducing type wherein the pressure at which the valves start to reduce or limit the outlet pressure is determined by a biassing load on the valve plungers. The biassing loads are provided by a beam which normally divides the load of a single biassing spring equally between each plunger. In the event of a failure in one sub-system the plunger of the valve in the other sub-system receives the full load of the spring so that the pressure at which that valve starts to limit or reduce is substantially increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.