Actuator for wheel anti-lock system
US4865398A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 25, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | May 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/42
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An actuator for a wheel anti-lock system, which comprises a first conduit connected to a brake master cylinder and a second conduit connected to a brake wheel cylinder. To the second conduit, there is connected a reservoir for reserving a predetermined amount of working liquid. Between the first conduit and the second conduit, there is interposed a feed change-over valve for opening or closing the communication between them. Between the second conduit and the reservoir, there is interposed a release change-over valve for opening or closing the communication between them. In the first conduit, there is disposed a normally open cut valve for closing the first conduit when in a skid control. To the first conduit, there is connected a pressure transducer in parallel with the cut valve. The pressure transducer includes: a body having a smaller bore connected to the brake master cylinder and a larger bore connected to the brake wheel cylinder; a stepped piston fitted in the two bores; and a spring for biasing the stepped piston toward the smaller portion thereof. When in the skid control, the pressure transducer feeds the second conduit with a pressure liquid, a predetermined amount larg…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.