Pressure control valve unit
US4230377A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Feb 14, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/361
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure control valve unit for an anti-locking apparatus in motor vehicle wheel brakes which is actuatable by a control pressure which controls the brake pressure in at least one wheel brake cylinder, the pressure control valve unit having a pressure exchange chamber, which alternatively has brake cylinder pressure and atmospheric pressure, defined by a switching diaphragm and the switching diaphragm comprising the switching member of a relay valve on one side and on the side--like the closing body of a rapid-release valve--is provided the monitor member of a brake cylinder line leading to the outside air so that the pressure control valve unit combines the advantages of relay and switching valves without their disadvantages and the valve unit can be utilized in other fields, which can be accomplished by simple additional switching arrangements and which extend beyond the normal anti-locking protection function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.