Boost-failure responsive fluid tapping valve in tandem master cylinder with booster piston at pedal-remote end of master cylinder
US4891945A · kind A · utility
8Cited by
11References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1987 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Aug 5, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/145
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The brake pressure generator (1) includes a tandem master cylinder (2) actuable by two booster pistons (19, 32) to which a hydraulic auxiliary pressure is applied and by a pedal actuating mechanism (17,18). A control valve (14, 20) controls the auxiliary boost pressure. The control valve, through an actuator (16), cooperates with the pedal actuating mechanism (17,18). One booster piston (32) is disposed on the bottom of the tandem master cylinder (2) adjacent the push rod (22). Normally-open valve (37) closes when brake pressure exceeds boost pressure to trap fluid in chamber (34).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.