Wheel lock-up prevention apparatus
US4196941A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1977 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Oct 31, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/343
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
There is provided a wheel lock-up prevention device for compressed air operated brakes of a motor vehicle which includes a common control of the pressure in the brakecylinders of a given wheel axle. The control is accomplished by means of multi-position main valves which include magnetic pre-control valves with identical control magnets and with armatures having integral closure bodies. Furthermore, the valve bodies of the multi-position valves are substantially identical at least on their pressure side. The use of such simple and identical valves provides a modular-like construction making possible a selective 2-point or 3-point operation as well as a single-duct or a multi-duct embodiment of the wheel lock-up prevention device. Thus, during a functional test at the beginning of a trip, a dangerous and hence undesired release of the brakes when parked on an incline is prevented by means of the actuation of all of the magnets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.