Valve devices for use in liquid pressure braking systems of vehicles
US4072361A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1975 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Nov 10, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A valve device for use in split liquid pressure vehicle braking systems to control rear brake pressure comprises a plunger assembly in a cavity in a housing, the cavity being closed at one end. The plunger assembly has a central land between two smaller end lands. The central land slides within a central portion of the cavity which is between two smaller portions of that cavity. The central portion and the closed end portion of the cavity are formed in a main valve body and the other cavity portion is formed in another body which is carried by the main valve body. The plunger assembly carries a bar which co-operates with the shoulder between the central portion and the closed end portion of the cavity and with a valve unseating pin to unseat a ball in a passage through the central land. A biasing spring urges the plunger assembly towards the closed end of the cavity against the action upon the plunger assembly of front brake pressure which acts between the plunger assembly and the closed end of the cavity. Liquid pressure is transmitted from the master cylinder to the rear brake operating motor cylinders through those parts of the central cavity portion on either side of the centra…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.